18 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 20:07
  FFMPEG audio upsampling/resampling to 48000 Hz causes sound wheeze/noises/dissortions - okarpov Newest 'ffmpeg' Questions - Stack Overflow
  I'm using the following example http://svn.gnumonks.org/tags/21c3-video/upstream/ffmpeg-0.4.9-pre1/output_example.c to make videos. If I use 44100 Hz for the output audio format it seems that all is fine, but if I use 48000 Hz any audio gets wheeze. Any suggestion, please. Here are input audio and encoded video with that audio but in 48 kHz that has wheezing audio: http://www.unsode.com/test.zip -- http://svn.gnumonks.org/tags/21c3-video/upstream/ffmpeg-0.4.9-pre1/output_example.c, http://www.unsode.com/test.zip
• 17:36
  Converting RGB images into lossless video with avconv / ffmpeg - despens Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert a series of PNG24 images containing a screen animation to a lossless video, so that every pixel is reproduced exactly as it was in the original. But avconv (and ffmpeg) both produce the same, unsatisfying results, which seem to stem from a colospace conversion going wrong. This is the version of avconv I am using: avconv version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Apr 2 2013 17:02:36 with gcc 4.6.3 Each of the images is 1280×800 pixels in size. They do not contain any photographic motives, but specially dithered (...)
• 08:20
  IP-Cam / CCTV-Cam Live Streaming on iPhone/iPad - user1744691 Newest 'ffmpeg' Questions - Stack Overflow
  I want to get stream of an ip-cam on my iPhone/iPad and want to display it on screen. By R&D i found that ffmpeg is the only way to achieve it but i found nothing on ffmpeg. Is there any other way to achieve it or a confirmed way to get compiled ffmpeg on mac please mention that. Material regarding how to use ffmepg or source code example will be highly appreciated. Is there nothing built-in framework to achieve it if not then please mention if there is any free framework/sdk to achieve this functionality. (...)
• 08:07
  PHP FFmpeg video aspect ratio problem - Herr K Newest 'ffmpeg' Questions - Stack Overflow
  i compiled the new version of FFMPEG and the padding commands have been deprecated. As i try to get familiar with the new -vf pad= commands, i want to ask, how can i convert a video without changing it's aspect ratio. I've checked numerous solutions from stackoverflow, nothing seemed to work. Can someone, please post a working PHP example or cmd line. I would be VERY happy. Please note that the videos in question, could be 4:3 and also be 16:9 Let's say, i convert a 16:9 video to 640x480 format. It will need some bars at the top and at the bottom. That is what i want to do. (...)
• 00:46
  DirectShow Capture Source and FFMPEG - Juan Ayala Newest 'ffmpeg' Questions - Stack Overflow
  I have an AJA Capture card. The drivers installed with the card include some DirectShow filter. If I pop the filter into GraphEdit I see this: and if I run the ffmpeg command ffmpeg -f dshow -list_options true -i video="AJA Capture Source" I see [dshow ⓐ 0034eec0] DirectShow video device options [dshow ⓐ 0034eec0] Pin "Video" [dshow ⓐ 0034eec0] pixel_format=yuyv422 min s=720x486 fps=27.2604 max s=1024x 486 fps=29.985 ... [dshow ⓐ 0034eec0] Pin "Audio 1-2" [dshow ⓐ 0034eec0] Pin "Line21" video=AJA Capture Source: Immediate exit requested So I see the Video and Audio pins I need. But (...)
• 00:58
  H.264 conversion with FFmpeg (from a RTP stream) - Toby Newest 'ffmpeg' Questions - Stack Overflow
  Environment: I have an IP Camera, which is capable of streaming it's data over RTP in a H.264 encoded format. This raw stream is recorded from the ethernet. With that data I have to work. Goal: In the end I want to have a *.mp4 file, which I can play with common Media Players (like VLC or Windows MP). What have I done so far: I take that raw stream data I have and parse it. Since the data has been transmitted via RTP I need to take care of the NAL Bytes, SPS and PPS. 1. Write a raw file First I determine the type of each frame received over Ethernet. To do so, I parse the first (...)

17 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 21:06
  Opening the ALSA microphone port using libavformat - Kartik Aiyer Newest 'ffmpeg' Questions - Stack Overflow
  I'm writing a fairly simple application to open the microphone port using the ALSA format on a linux VM. I'm trying to do this using libavformat and other ffmpeg libs ( avutil, avcodec, etc ). I followed what ffmpeg was doing ( ffmpeg_opt.c: open_input_file) to open the actual microphone port( hw:0,0). I find the ALSA format using av_find_input_format( "alsa" ) which returns with a AVInputFormat* object. I then use this with avformat_open_input. I didn't precreate AVFormatContext and load it with any params before the above call ( I rely on it being created in (...)
• 17:52
  PHP exec or shell_exec not returning process id (PID) on Windows Wamp - HoplaYann Newest 'ffmpeg' Questions - Stack Overflow
  I am on windows 7, using a WampServer, and trying to use FFMPEG. The encoding works, but I can't get a process id back from either the exec() method nor the shell_exec() methods. This is my code : $cmd = C:\\ffmpeg\\bin\\ffmpeg.exe -i "C:\\...\\4ch.wav" -ar 44100 -ab 48000 -f mp3 -y "C:\\...\\enc_4ch.mp3" This what I was trying to do with shell_exec : shell_exec("nohup $cmd > /dev/null & echo $!"); And with exec : exec("nohup " . $this->_command . " > /dev/null 2>/dev/null &") ; // returns null exec("nohup " . $this->_command . " > /dev/null 2>&1 &"); // also returns null (...)
• 15:18
  How can I render video frames using QtFFmpegWrapper? - user2311434 Newest 'ffmpeg' Questions - Stack Overflow
  I have downloaded the latest QtFFMpegWrapper for Qt5, I am stuck with that how to configure the FFMPEG with QT5 and to render the video frames. My Configuration is QT5 intergrated with Visual Studio2010
• 13:14
  Decode h264 stream with ffmpeg introduces a delay, how to avoid? - Jonas Jongejan Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on some code that encodes a video feed, sends it over UDP to a client that then decodes the stream. It working fine using a x264 encoder, my only problem is that when i call avcodec_decode_video2 on the incomming frame, the decoder introduces a delay as if it has an internal buffer. How can i avoid this? What is controlling this behavior? Is it the encoder that should be changed, or is it missing settings in the decoder context? Currently i just create the decoder context with defaults avcodec_get_context_defaults3. The encoder has the following parameters: x264_param_t (...)
• 10:32
  Audio encoding using avcodec_fill_audio_frame() and memory leaks - praks411 Newest 'ffmpeg' Questions - Stack Overflow
  As a part of encoding decoded audio packets, I'm using avcodec_fill_audio_frame(). I'm passing allocated AVFrame pointer to along with buffer containing the decoded samples and other parameters number of channels, sample format, buffer size. Though the encoding is working fine I'm not able to completely eliminate the memory leaks. I've taken care of most of things but still I'm not able detect the leakage. Below is the function which I'm using for encoding. Please suggest something. AudioSample contains decoded data and it is completely managed in different (...)
• 09:31
  Enabling ffmpeg Library at a Runtime? - Wildan Muhlis Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to enabling ffmpeg library(e.g librtmp) at runtime? (not from config build)
• 07:51
  Transcoding wmv file to mp4 using Jave - Fawkes Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use Jave to convert a wmv file into h264(mp4). The final version created by Jave plays fine with VLC player but when I try to use it inside the HTML5 video tag, it is not able to play the file. I am guessing that the issue is with the attributes I am setting for the video attributes. Java Code: videoAttributes.setCodec("mpeg4"); videoAttributes.setTag("mpeg4"); videoAttributes.setBitRate(new Integer(5000)); videoAttributes.setFrameRate(new Integer(30)); videoAttributes.setSize(new VideoSize(512, 384)); encodingAttributes.setVideoAttributes(videoAttributes); (...)
• 05:04
  How can I generate a video file directly from an FFmpeg filter with no actual input file? - blahdiblah Newest 'ffmpeg' Questions - Stack Overflow
  FFmpeg has a number of video generating filters, listed in the documentation as "video sources": cellauto color mptestsrc fei0r_src life nullsrc, rgbtestsrc, testsrc Those are great for using with other filters like overlay, but is there any way that I can generate a movie consisting of just one of those video sources without any input video? Something like: ffmpeg -vf color=red" red_movie.mp4 Except that that errors out with At least one input file must be (...) -- video sources
• 03:18
  FFMPEG with PHP convert video to mp4 and snapshots - Dylan Cross Newest 'ffmpeg' Questions - Stack Overflow
  I have recently started working on a website where users can upload videos to, and I am a beginner with ffmpeg, however I have been searching and searching for how to do these things I want to do, however most of them aren't working for me. I would like to convert any video type to .mp4 and keep the quality as good as possible. Right now my code is only working for .mov and .mp4 uploads, however .avi aren't converting (it doesn't even make a new file for those). I would also like to take high quality screenshots from the video as well, but the screenshots I am getting now (...)
• 02:38
  FFMPEG static build with RTMP support? - Wildan Muhlis Newest 'ffmpeg' Questions - Stack Overflow
  Is there any FFMPEG static build(linux CentOS in my case) download link with an RTMP support(--enable-librtmp)? I have try to build one but it's unsuccessful.

16 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:34
  x264_encoder_open always return null - chinayin Newest 'ffmpeg' Questions - Stack Overflow
  this is my code x264_param_default(&m_X264Param) ; nRet = x264_param_default_preset(&m_X264Param,"medium","zerolatency") ; if (nRet) return -1; if (cpMain == Param.nProfile) nRet = x264_param_apply_profile(&m_X264Param,"main") ; else if (cpSimple == Param.nProfile) nRet = x264_param_apply_profile(&m_X264Param,"baseline") ; else if (cpComplex == Param.nProfile) nRet = x264_param_apply_profile(&m_X264Param,"high"); if (nRet) return -1; m_X264Param.i_width = Param.nWidth ; m_X264Param.i_height = Param.nHeight ; m_X264Param.i_threads = X264_THREADS_AUTO ; (...)
• 21:25
  ffmpeg install on CentOS 64-bit 'install with -fPIC' error - ndmweb Newest 'ffmpeg' Questions - Stack Overflow
  I get this error when attempting to compile ffmpeg on a 64bit CentOS machine. Here are my ./configure options: ./configure --enable-shared --enable-gpl --enable-nonfree --enable-postproc --enable-swscale --enable-pthreads --enable-libx264 --enable-libxvid --enable-libvorbis --enable-libfaac --enable-libmp3lame --enable-libvpx make I get the following error when compiling the source: /usr/bin/ld: /usr/local/lib/libvpx.a(vpx_codec.c.o): relocation R_X86_64_32 against .rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/local/lib/libvpx.a: could not (...)
• 15:25
  Using ffmpeg static libraries in an visual studio explress C++ 2010 project - Yvo Götz Newest 'ffmpeg' Questions - Stack Overflow
  As the title says, I have been trying to get ffmpeg/libav libraries to work in MSVC++ 2010. However, I keep running in the following error while coding on debug mode. code: extern "C" #ifndef __STDC_CONSTANT_MACROS #define __STDC_CONSTANT_MACROS #endif #include #include #include #include int main( int argc, char* argv[] ) av_register_all(); return 0; console: 1>------ Build started: Project: ffmpeg, Configuration: Debug Win32 ------ 1>ffmpeg.obj : error LNK2019: unresolved external symbol _av_register_all referenced in function _main 1>C:\\Users\\okki\\documents\\visual studio (...) -- zeranoe's
• 23:41
  Is there a way to calculate an instant bitrate of video stream? [closed] - IOException Newest 'ffmpeg' Questions - Stack Overflow
  I found out simple solution by googling around but it requires remuxing stream to avi container: http://akuvian.org/src/mplayer/avi_bitrate.pl This works on AVI files (regardless of codec), so you'd have to remux it first. Requires perl, mplayer, and gnuplot. It works for me Any other solutions? -- http://akuvian.org/src/mplayer/avi_bitrate.pl
• 23:19
  Best server side video processing library or software - Projapati Newest 'ffmpeg' Questions - Stack Overflow
  I need your suggestion on selecting the right command line tool that would allow me to process user uploaded videos. By processing I mean: Convert to flv, mp4, ogg etc formats Modify quality, bitrate, framerate etc Control file size and other attributes Might need to process video in batch mode This processing will be done though some scheduled process that would grab the file and then process. The tool must have command line utilities. I only know the free FFMPEG library. Are there other (if costs money then fine) tools that allow me to do these? What is used by youtube if you know (...)
• 12:25
  FFMPEG how to mux MJPEG encoded data into mp4 or avi container c++ - p.streef Newest 'ffmpeg' Questions - Stack Overflow
  I'm looking for a way to mux mjpeg (compressed) video data into a video container like mp4 or avi. (I'll also need to add audio in the future). Since i use FFMPEG in other parts of my project as well i'd like to do it using those libraries if possible. I'm not looking for command line FFMPEG use! I've tried to use the muxing example in ffmpeg with that i can only create a (very large) .mjpeg file with video information. This is not what I am looking for. Examples would be very welcome, but a pointer in the right direction also works! edit: I have output the yuvj422p (...)
• 09:29
  How can I encode and segment audio files without having gaps (or audio pops) between segments when I reconstruct it? - fenduru Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a web application that requires streaming and synchronization of multiple audio files. For this, I am using the Web Audio API over HTML5 audio tags because of the importance of timing audio. Currently, I'm using FFMPEG's segmentation feature to encode and segment the audio files into smaller chunks. The reason I am segmenting them is so I can start streaming from the middle of the file instead of starting from the beginning (otherwise I would've just split the files using UNIX split, as shown here. The problem is that when I string the audio segments back (...) -- Web Audio API, as shown here
• 10:57
  Display UDP(RGB) Input to ffmpeg or vlc - thalsharif Newest 'ffmpeg' Questions - Stack Overflow
  I receive from local port UDP packets that content only RGB payload (video stream). How can I display RGB using ffmpeg or vlc?
• 10:56
  FFMPEG - format not available? - Julien Greard Newest 'ffmpeg' Questions - Stack Overflow
  I'm converting some code from FFMPEG 0.8 to FFMPEG 1.2. I have an error during the call to the method avcodec_open2(): "Specified pixel format %s is invalid or not supported". The format I use is : AV_PIX_FMT_RGB24. It should be enabled by default, right? Below is my code: av_register_all(); codec = avcodec_find_encoder(AV_CODEC_ID_MPEG2VIDEO); if(!codec) throw SystemException("codec not found"); codecContext = avcodec_alloc_context3(codec); codecContext->bit_rate = 200000; codecContext->time_base.den = 1; codecContext->time_base.num = 90000; codecContext->gop_size = 8; (...)
• 10:55
  How to build ffmpeg and x264 for iOS 6.0? - user2388180 Newest 'ffmpeg' Questions - Stack Overflow
  Here's my configuration: ./configure --enable-libx264 --enable-gpl --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-avfilter --disable-debug --disable-decoders --enable-cross-compile --disable-encoders --disable-armv5te --enable-decoder=h264 --enable-encoder=libx264 --enable-pic --cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --extra-ldflags='-arch armv7 (...)
• 09:42
  Learning Shell - creating a script with parameters that runs two separate cli apps - GuilhermeNagatomo Newest 'ffmpeg' Questions - Stack Overflow
  I want to learn shell script, so I'm trying to download a youtube video using youtube-dl then convert it to mp3 using ffmpeg. I do it manually running youtube-dl http://youtube.com/watch?v=... then ffmpeg -i downloadedFile -ab 256000 -ar 44100 audioFile.mp3. I know that I need to pass two arguments to my script, one for the video url and another for the audio file to keep things as simple as possible, but I don't know how to start. Maybe grep the video id in the url and using it to know which file to use to convert into mp3? (since youtube-dl saves the video named by it's (...)
• 11:21
  Air and ffmpeg with NativeProcess - Pierre Newest 'ffmpeg' Questions - Stack Overflow
  I´trying to create an Air application that can generate a movie file via ffmpeg. I´m using NativeProcess and it all works fine if (and only if) I add an ffmpeg that is compiled on my computer to the native installer. Whenever I try to use a precompiled build the process fails like this: NSTask: Task create for path 'mypathto/ffmpeg' failed: 22, "Invalid argument". Terminating temporary process. If I was the only user I wouldn´t have a problem. But I want other people to use my application so I really need to bundle the ffmpeg with my native installer. I have tried several (...)
• 08:53
  Fast gnuplot terminal compatible with ffmpeg - DarioP Newest 'ffmpeg' Questions - Stack Overflow
  I am using gnuplot to make some thousands of frames from raw data, I then make a video with ffmpeg (the easiest way I know to use advanced codecs like x264). The frames are not complicated: just few lines and some dots. Up to now I have been using the pngcairo terminal to produce the frames, but I noticed that postscript is way faster than pngcairo. Unfortunately ffmpeg doesn't recognize postscript, so I was wondering if you know a fast (but still a good quality -at least antialiased) gnuplot terminal which output can be readed by (...)
• 08:46
  PHP Ignoring my max_execution_time - Muhammad Resna Rizki Pratama Newest 'ffmpeg' Questions - Stack Overflow
  I have some task in my script that is about converting video with ffmpeg . I do this with codeigniter 2.0.3 and locate the script at libraries and use shell_exec() to run ffmpeg. There are 3 tasks in my php script. Upload File Convert video to .flv Generate thumb Save to db. When I upload file, my php script start to convert my uploaded video. But when converting is end about over 5 minutes. Its not continue to generate thumb. And Its say PHP Fatal error: Maximum execution time of 300 seconds exceeded in C:\\AppServ\\www\\mis\\application\\libraries\\my_video_utility.php on line 102, (...) -- http://localhost/mis/test/
• 09:02
  Streaming video from an image using FFMPEG on Windows - Daniel Zohar Newest 'ffmpeg' Questions - Stack Overflow
  I wrote a program that simulates a camera and converts the output into a video stream. The program is required to be able to run on Windows. There are two components in the system: Camera Simulator. A C++ program that simulates the camera. It copies a pre-generated frame (i.e. PNG file) every 0.1 seconds, using the windows copy command, to a destination path ./target/target_image.png Video Stream. Using FFmpeg, it creates a video stream out of the copied images. FFmpeg is ran with the following command: ffmpeg -loop 1 -i ./target/target_image.png -r 10 -vcodec mpeg4 -f mpegts (...)
• 05:01
  how to built ffmpeg X264 for ios6.0? - user2388180 Newest 'ffmpeg' Questions - Stack Overflow
  ./configure --enable-libx264 --enable-gpl --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-avfilter --disable-debug --disable-decoders --enable-cross-compile --disable-encoders --disable-armv5te --enable-decoder=h264 --enable-encoder=libx264 --enable-pic --cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --extra-ldflags='-arch armv7 -isysroot (...)
• 02:05
  Traceback error with Python when using ffmpeg to convert a video - TheMickeyNick Newest 'ffmpeg' Questions - Stack Overflow
  The simple way my script runs is the user provides a folder location and a filetype and glob.glob() finds the files with the filetype provided and adds them to a list. It then uses a for loop and goes through the list and converts each video. But it doesn't like when I try to run my ffmpeg command. Any help would be awesome. I'm also using Win 7 64 bit with 64 bit ffmpeg and Python 3.3 Here's the error: OS Error Traceback (most recent call last): File "C:\\Python33\\lib\\subprocess.py", line 1106, in _execute_child startupinfo) FileNotFoundError: [WinError 2] The system cannot (...)

15 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:28
  Is /usr/local/lib searched for shared libraries? - Leo Izen Newest 'ffmpeg' Questions - Stack Overflow
  Is /usr/local/lib searched for shared libraries ? I have this error: [Leoⓐchessman ~]$ whereis ffmpeg ffmpeg: /usr/local/bin/ffmpeg [Leoⓐchessman ~]$ ffmpeg ffmpeg: error while loading shared libraries: libavcore.so.0: cannot open shared object file: No such file or directory [Leoⓐchessman ~]$ ls /usr/local/lib/libav* /usr/local/lib/libavcodec.a /usr/local/lib/libavfilter.a /usr/local/lib/libavcodec.so /usr/local/lib/libavfilter.so /usr/local/lib/libavcodec.so.52 /usr/local/lib/libavfilter.so.1 /usr/local/lib/libavcodec.so.52.108.0 /usr/local/lib/libavfilter.so.1.74.0 (...)
• 22:57
  How to convert H264 RTP stream from PCAP to a playable video file - yoosha Newest 'ffmpeg' Questions - Stack Overflow
  I have captured stream of H264 in PCAP files and trying to create media files from the data. The container is not important (avi,mp4,mkv,…). When I'm using videosnarf or rtpbreak (combined with python code that adds 00 00 00 01 before each packet) and then ffmpeg, the result is OK only if the input frame rate is constant (or near constant). However, when the input is vfr, the result plays too fast (and on same rare cases too slow). For example: videosnarf -i captured.pcap –c ffmpeg -i H264-media-1.264 output.avi After doing some investigation of the issue I believe now that since the (...) -- videosnarf
• 19:17
  Video processing to support different web players and qualities [closed] - Linas Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to accomplish something similar to youtube player. The biggest issues I'm facing now is how should I process user uploaded video file. For example since i want to switch between 240p, 360p, 480p and 720p I need to convert uploaded video file to 4 different files for each resolution, and because not all browsers can play mp4 i need ogg, mp4, webm, so that makes 12 video files, and say if it takes 10 minutes to process 1h video file it would take me about 2h just to process that file which is insane. I know that youtube is ussing cloud servers to process each video file (...)
• 08:41
  php exec() works on some calls, not other similar ones - Kyle Newest 'ffmpeg' Questions - Stack Overflow
  I have a php script that cuts up video. Here are three exec() commands - two execute properly while one does not: Works: sudo ffmpeg -i /home/vidserver/videos/$filename.mp4 -ss $ctime -t 00:00:06 -acodec copy -vcodec copy -y /var/vidcache/test$x.mp4 Works: sudo ffmpeg -i /var/vidcache/test$x.mp4 -qscale:v 1 /var/vidcache/i$x.mpg Does not work: sudo ffmpeg -i concat:"i0.mpg|i1.mpg" -qscale:v 1 /var/vidcache/output.mpg /var/vidcache has 777 privs and www-data is in the sudoers file with NOPASSWD (yes, I know - this is just for debug purposes before I lock down security). When I run (...)
• 08:39
  Setting individual pixels of an RGB frame for ffmpeg encoding - Camille Goudeseune Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to change the test pattern of an ffmpeg streamer, Trouble syncing libavformat/ffmpeg with x264 and RTP , into familiar RGB format. My broader goal is to compute frames of a streamed video on the fly. So I replaced its AV_PIX_FMT_MONOWHITE with AV_PIX_FMT_RGB24, which is "packed RGB 8:8:8, 24bpp, RGBRGB..." according to http://libav.org/doxygen/master/pixfmt_8h.html . To stuff its pixel array called data, I've tried many variations on for (int y=0; y At HEIGHTxWIDTH= 80x60, this version yields , when I expect a single blue-to-red horizontal gradient. 640x480 yields (...) -- http://libav.org/doxygen/master/pixfmt_8h.html
• 09:20
  ffmpeg PNG - MP4 - Error opening input files: invalid argument - Max Savage Kramer Newest 'ffmpeg' Questions - Stack Overflow
  I am following along with this visualization project converting PNG files in an MP4. The only change from the code on the example is that my time stamp starts with 1. ffmpeg -r 20 -b 20M -i example%01d.png output.mp4 And this is what returns ffmpeg version N-53055-g7b43120 Copyright (c) 2000-2013 the FFmpeg developers built on May 14 2013 20:43:53 with llvm-gcc 4.2.1 (LLVM build 2336.11.00) configuration: --disable-yasm libavutil 52. 31.100 / 52. 31.100 libavcodec 55. 9.100 / 55. 9.100 libavformat 55. 7.100 / 55. 7.100 libavdevice 55. 0.100 / 55. 0.100 libavfilter 3. 67.100 / 3. 67.100 (...) -- visualization project

14 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:43
  FFMPEG Transcoding suddenly stops - Asiya Khan Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg to transcode an rtmp stream using the code below: ffmpeg -y -i rtmp://server/videochat/testing -acodec libfaac -ac 2 -ab 64k -vcodec libx264 -f flv rtmp://server/videochat2/testing90p It works perfectly for about the first 14 minutes but then it suddenly gives the below error. I have seen the cpu usage, it never exceeds 5%, and also memory never exceeds 0.2%. There is enough bandwidth as when I just stream the show it works perfectly. I am compelety stuck about this, does anyone know how to proceed! nst_/testing90p]: Add chunk: id:8 mode:TS[H264,AAC] a/v/k:61/250/1 (...)
• 16:41
  Transcode HLS Segments individually using FFMPEG - rayh Newest 'ffmpeg' Questions - Stack Overflow
  I am recording a continuous, live stream to a high-bitrate HLS stream. I then want to asynchronously transcode this to different formats/bitrates. I have this working, mostly, except audio artefacts are appearing between each segment (gaps and pops). Here is an example ffmpeg command line: ffmpeg -threads 1 -nostdin -loglevel verbose \\ -nostdin -y -i input.ts -c:a libfdk_aac \\ -ac 2 -b:a 64k -y -metadata -vn output.ts Inspecting an example sound file shows that there is a gap at the end of the audio: And the start of the file looks suspiciously attenuated (although this may not be an (...) -- http://en.wikipedia.org/wiki/Gapless_playback, http://en.wikipedia.org/wiki/FAAC
• 16:54
  ffmpeg conversion for an entire folder? [closed] - user218314 Newest 'ffmpeg' Questions - Stack Overflow
  Ive been using: sudo ffmpeg -i Test.mkv -vcodec copy -acodec libfaac -ac 2 -ab 328k Test.mp4 for individual files, but now I have many gigabytes of mkvs in a folder and would like to do a conversion for all at once and walk away from the computer. I appologize for my ignorance, but i am very new to linux and i dont understand how bash scripts are written or if it would even be necessary. also, i believe the command downsamples the DTS audio in the mkv to 2 channel AAC. am i correct that 328k is the highest bitrate I can convert (...)
• 16:56
  Memory leak while opening encoders in ffmpeg - praks411 Newest 'ffmpeg' Questions - Stack Overflow
  I'm getting memory leaks in avcodec_find_encoder. Although I'm cleaning the resources properly still I'm not able to get rid of the leak. By successive commenting the code I found that memory leaks happen only after the call of avcodec_find_encoder(). I've tried my code with different video files and I found that memory leaks blocks are always same. Also if I open only audio or video then I get just one memory leaks block. Below is the part of Init and Clean-up code from the application. Note that this is just part of code which contains initialization and resource (...)
• 13:40
  FFmpeg 1.0 causing audio playback issues - Jona Newest 'ffmpeg' Questions - Stack Overflow
  I have an audio streamer based on ffplay. It works great using ffmpeg 0.11 but when I use ffmpeg 1.0 or the latest 1.2 release the audio seems to be decoded or played weirdly. Essentially it sounds like chipmunks with mp3 streams and with aac streams I hear tons of static barely hearing the actual stream and the actual stream sounds slow. Any ideas the possible changes in ffmpeg that could have caused these types of issues? Similar issue was posted here but no actual answer about what is going on. Supposedly this code reproduces the same issue. UPDATE 1: I have done a step by step (...) -- this code
• 13:05
  How to make a MP4 header from a flv file with ffmpeg? [closed] - ChenClock Newest 'ffmpeg' Questions - Stack Overflow
  I'm a pythoner and I have to make an mp4 header from an flv file as soon as possible,or my boss would kill me.
• 11:53
  Seeking video using av_seek_frame() - praks411 Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently writing a small program to copy a clip from video file. The input from user is start and end time of clip. I'm converting the start time to frame number and then I'm seeking both audio and video stream. Though video seek is passing but audio seek is failing. I'm trying to seek a video file using av_seek_frame(). The file contains both audio and video streams. I would like to know when I seek one of the streams what happens to other. For example if I seek video stream to a particular frame. Does audio stream also advances to that frame. or do I need to seek (...)
• 09:54
  Best format available for jwplayer - offboard Newest 'ffmpeg' Questions - Stack Overflow
  I want the quality 360p, so I thought the format. Mp4 but is slow to load the video on my local server is faster but takes a long web. videos in flv is faster. I use ffmpeg to convert videos I'm using this command line to convert the file. mp4 ffmpeg-i "video.avi"-ar 22050-ab 32-f mp4 video.mp4 and also use this: ffmpeg-i video.avi-vf scale = -1:360-c: v libx264-preset ultrafast video.mp4 I do not understand is slow to load, I think it may be the bitrate or file size, I do not know, by my testing the player expect to load the whole video to play, but not flv, so I do not (...)

13 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 08:50
  YouTube coding parameters [closed] - Tim N Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to find the transcoding parameters to apply to a video to avoid recoding after upload. Currently the best google seems to offer is lots of info on the API, and a 404 when it comes to the actual content itself.
• 19:56
  ffmpeg - Stream multiple files over an ffserver to one ffplay at different times? [closed] - golmschenk Newest 'ffmpeg' Questions - Stack Overflow
  I have an ffserver up and running. Using this server I can run a simple ffplay command: ffplay udp://localhost:7777 which then waits for a stream. Then if I stream something to the server with a simple ffmpeg command: ffmpeg -re -i small.mp4 -f mpegts udp://localhost:7777 The video pops up and plays fine. However, after the video is finished and the ffplay is still waiting open with the display window showing the last frame of the video just sent, then if I try to run the same ffmpeg command again to play the video again, the ffplay gets a bunch of warnings which look similar to: (...)
• 22:53
  I tried to make an avi file from images using ffmpeg but the avi file is very small why? - Yaron Cohen Minz Newest 'ffmpeg' Questions - Stack Overflow
  I tried this: In C# i'm creating 100 bitmap files: for (int i = 0; i Then i'm using the ffmpeg.exe command line to create an avi file movie of all the bitmaps. D:\\ffmpegtorun\\ffmpeg-20130509-git-13cb6ed-win32-static\\bin\\Screenshots>ffmpeg - f image2 -r 5 -i Screenshot000099.bmp -c:v libx264 -r 30 out.mp4 And before it i tried: D:\\ffmpegtorun\\ffmpeg-20130509-git-13cb6ed-win32-static\\bin\\Screenshots>ffmpeg - f image2 -r 1/5 -i Screenshot000099.bmp -c:v libx264 -r 30 out.mp4 When i tried to use jpg files i got an error say jpeg is not supported. Then when the files were (...)
• 23:13
  use python to split a video file into a set of parts - user1485853 Newest 'ffmpeg' Questions - Stack Overflow
  I use the following python code to split a FLV video file into a set of parts ,when finished ,only the first part video can be played ,the other parts are corrupted.I wonder why and Is there some correct ways to split video files the code format is mussy here please see the formated code here -- here
• 19:09
  Convert series of images to video - user1055153 Newest 'ffmpeg' Questions - Stack Overflow
  I have series of images with sorted names, like 0000000354 ... 0000008591 I have tried using ffmpeg or MEncoder to convert theme. In ffmpeg the problem is this that it will operate while the names are like 0000000001 ... 00000000009 with %010d syntax.I don't know what syntax i should use for my images names.in mencoder it will cover all images But when i play the output video it doesn't show images,I want to show every image in 5 seconds or somthing like this, any one can (...)
• 19:56
  Problems converting .flv to mp3 using FFmpeg SDK - feadur Newest 'ffmpeg' Questions - Stack Overflow
  I'm using the FFmpeg SDK to programmatically convert videos to mp3. I read the audio frames of the video this way: while(av_read_frame(pFromCtx, &pkt) >= 0) if(pkt.stream_index == audioStreamIndex) avcodec_get_frame_defaults(frame); got_frame = 0; ret = avcodec_decode_audio4(pCodecCtx, frame, &got_frame, &pkt); if (ret streamspToCtx, frame); av_free_packet(&pkt); Decoding the audio from the input video file works fine. The problem occurs when I try to encode a mp3 frame: static void write_audio_frame(AVFormatContext *oc, AVStream *st, AVFrame *frame) (...)
• 19:16
  ffmpeg hangs when run in background - yoosha Newest 'ffmpeg' Questions - Stack Overflow
  If I run ffmpeg as follows: ffmpeg -i H264-media-4.264 4.avi It works OK (i.e. 4.avi created OK). However, if I try to run it in background: ffmpeg -i H264-media-4.264 4.avi & it hangs! (and 4.avi never created) Any Idea? Note: The problem is an isolation of of similar problem in python when trying to run it as subprocess and there it hanged as well: ff.py includes ps = subprocess.Popen(ffmpeg_list, stderr=subprocess.STDOUT,stdout = subprocess.PIPE) and running ./ff.py runs OK, ./ff.py & hangs too. System: CentOS 6.6 ffmpeg: 0.10.2 Results from successful run: ffmpeg version (...)
• 20:24
  How to encode non-camera video in Android - rwei Newest 'ffmpeg' Questions - Stack Overflow
  I am working on an android application in which a video is dynamically generated by compositing a sequence of animation frames. I tried to use the Android Media Recorder API for this but have not found a way to get it to accept a non-camera source as input. I have been attempting to use a FFMPEG port (based on the Rockplayer build) but am running into difficulties with missing functions since I am using it as an encoder, not a decoder. The iPhone version of this app uses AVAssetWriter from the AVFoundation framework. Is there an easier way to do this or am I stuck slugging it out with (...)
• 14:13
  How do i use the ffmpeg exe file command line? [closed] - Yaron Cohen Minz Newest 'ffmpeg' Questions - Stack Overflow
  I tried this: ffmpeg -f image2 -i image%d.jpg video.mpg But what i want to do is to take one jpg file i have on the hard disk and convert it to avi file using mpeg4 compression. How can i do it ?
• 14:49
  ffmpeg error using Fade Seconds [migrated] - Ben Humphreys Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to fade a video clip in and out with a duration of a few seconds, and ffmpeg seemed like the best way. The documentation mentions a fade option, and I have it working with a time in frames, but I really want to be able to use seconds. Using the example from the docs, and adding the following to a working encode command: -vf "fade=t=in:st=5.5:d=0.5" I get: [fade ⓐ 0x102f009a0] Option 'st' not found [AVFilterGraph ⓐ 0x102f00d00] Error initializing filter 'fade' with args 't=in:st=5.5:d=0.5' I get the same error using the long argument start_time I (...) -- fade option
• 14:20
  Generating MPEG DASH videos which are compilant with HbbTV 1.5 standard - Kai Mysliwiec Newest 'ffmpeg' Questions - Stack Overflow
  I am looking for a the command line options for ffmpeg, DASHEncoder and MP4Box to generate HbbTV 1.5 compilant MPEG DASH videos. See http://www.hbbtv.org/pages/about_hbbtv/specification.php for more information on the HbbTV 1.5 standard and its DASH profile which is used there. -- http://www.hbbtv.org/pages/about_hbbtv/specification.php
• 06:48
  ffmpeg : Extracting the frames out of the video with corresponding time in ms [closed] - ph3n0m_aks Newest 'ffmpeg' Questions - Stack Overflow
  I am using the following command : ffmpeg -i image%d.png which outputs the image(frame number).png. But I have a requirement where I have to append time at which frame is extracted(in ms) in the image files. And also I want to extract the frames at each and every second. How should I go about it?? Thanks in adavance..!
• 11:54
  FFmpeg exit value = 4 - Yuliya Tarasenko Newest 'ffmpeg' Questions - Stack Overflow
  I try to run ffmpeg command on android devices. On some of them the code below works excellent and the video is created. But on some(e.g. motorola xoom) the exit value is 4. And while debugging on samsung galaxy s 2.3.3 it frozes up on process.waitFor(); Could anyone help me please? I can't understand what is wrong. public void execFfmpeg() try File resultFile = new File(mContext.getFilesDir() + "/ffmpeg"); String[] command = null; command = new String[] resultFile.getAbsolutePath(), "-shortest", "-i", audioPath, "-loop", "1", "-i", imagePath, "-acodec", "ac3", "-ab", "128k", (...)
• 11:52
  Batch Programming Looping? - Michael Barth Newest 'ffmpeg' Questions - Stack Overflow
  I'm not an expert in batch programming, my only skill is in C\\C++. I'm not even sure how to go about this really. I've got a bunch of videos like Video1.mp4, Video2.mp4 (that's not their actual names, but they do have numbers indicating beginning and end) Basically I have this FFMPEG command that I can use to convert all of these to an aspect ratio of 16:10 that looks something like this: "ffmpeg -i "Section 1 Video 1.mp4" -aspect 16:10 OutSection 1 Video 1.mp4" "ffmpeg -i "Section 1 Video 2.mp4" -aspect 16:10 OutSection 1 Video 2.mp4" "ffmpeg -i "Section 2 Video 1.mp4" (...)
• 03:58
  Color shift when encoding DNxHD QuickTime Video [closed] - Yani Newest 'ffmpeg' Questions - Stack Overflow
  I have been tasked with developing the Editorial submission pipeline for an animated feature film project. Our studio is based on Windows 7 and the Editing team is using Avid Media Composer. We have decided to go with the "fast import" approach for bringing media into Avid. My tools take some frames and encode DNxHD QuickTime videos from them, then we write out an ALE document to assist with the batch importing of the delivery content. We call it the "fast import" approach because Avid only has to change the video container from MOV to MXF and it doesn't have to do any real encoding (...)
• 05:12
  best approach for extracting image sequence from video file in Java - Daniel Ruf Newest 'ffmpeg' Questions - Stack Overflow
  Well, there is FFMPEG and some Java bindings and wrappers for it but I need to distribute for each specific platform the right binary file of FFMPEG. Isnt there any plain Java solution or library without any dependencies like FFMPEG for converting a video fle to an image sequence? Solutions like FFMPEG, XUGGLER or JMF (abandoned) are not suitable. Is there really no pure Java solution for this? Maybe for specific video codecs / files at least? I just want to extract the images from the video file to jpeg / png files and save them to the (...)
• 05:09
  Why does av_write_trailer fails? - user1914692 Newest 'ffmpeg' Questions - Stack Overflow
  I am processing a video file. I use ffmpeg to read each packet. If it is an audio packet, I write the packet into the output video file using av_interleaved_write_frame. If it is a video packet, I decode the packet, get the data of the video frame, process the image, and compress back to a packet. Then I write the processed video frame packet into the output video file using av_interleaved_write_frame. Through debugging, it read audio packets and video packets correctly. However, when it goes to "av_write_trailer", it exits. But the output video file exists. The error information is: (...)
• 03:39
  ffmpeg network congestion(block) - user1855127 Newest 'ffmpeg' Questions - Stack Overflow
  everyone! I use ffmpeg (avformat_open_input()) to open a network stream example "mms". And then ,i read frames 、decoder and play. Finall close it with avformat_close_input(). Above process are no problem. Problem: I want to cycle the operation above, such as switch mms url. Like switch "mms://url_one" to "mms://url_two". The "mms:url_one" operation is good . But "mms://url_two" is congestion(block) in avformat_read_frame(). PS: I also try av_open()、av_read()、av_close() to get the datas. But get the same result like above. Q:has anyone who know (...)
• 01:57
  YouTube's HD Video Streaming Server Technology? - bgentry Newest 'ffmpeg' Questions - Stack Overflow
  Lately I've been researching different methods for streaming MP4s to the browser. Flash Media Server is an obvious choice here (using Cloudfront), and most solutions I've seen use the RTMP protocol. However, I spent some time on YouTube with Firebug and Chrome debugger figuring out how their streaming worked and I discovered some interesting differences between some of their videos and quality rates. My two sample videos are A and B. A is available up to 480p and B is available up to 1080p. For both videos, all rates up to 480p are served in an FLV container with H.264 video and (...) -- B
• 00:33
  ffmpeg - Can I draw an audio channel as an image? - Redtopia Newest 'ffmpeg' Questions - Stack Overflow
  I'm wondering if it's possible to draw an audio channel of a video or audio file as an image using ffmpeg, or if there's another tool that would do it on Win2k8 x64. I'm doing this as part of an encoding process after a user uploads a video or audio file. I'm using ColdFusion 10 to handle the upload and calling cfexecute to run ffmpeg. I need the image to look something like this (without the horizontal lines):

12 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:09
  Is there any limit for concat demuxer parameters number? [closed] - Tatev Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to join .mp3 files with ffmpeg, using this syntax ffmpeg -i "concat:input1.mp3|input2.mp3|input3.mp3" -c copy output.mp3 but when I have a large number of parameters it doesn't work. So , is there any limit for concat parameters number?
• 02:57
  what is the best open source framework for programmatically producing .mov or .flv video files? [closed] - Andrew Arrow Newest 'ffmpeg' Questions - Stack Overflow
  I would like to programmatically produce a simple animation video. Don't think "Toy Story" level of animation, think simple stick figures moving around the screen and other very simple lines and dots in black and white only. The point of the video is to explain a complicated scientific concept with a 5 minute video vs. pages and pages of text trying to describe images with words. What is the best open source framework to make a .mov or .flv file that I can then upload to youtube or vimeo. I could use ImageMagick to write out jpeg after jpeg, and then ffmpeg to turn those jpegs into a (...)
• 18:21
  Cannot open videos in Opencv - Mahesh Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to open .avi file in opencv. When I run the code I do not get any error but the video does not play. I searched around and I guess it requires ffmpeg to be installed. So I installed it using sudo apt-get install libavformat-dev libavcodec-dev libavfilter-dev libswscale-dev It still does not work. Maybe the compiler needs to know where to find ffmpeg. I am using gcc compiler. Thanks. ⓐPaul R: I have just copied the code from the Learning Opencv textbook, so wasn't including it. The code: #include #include int main( int argc, char** argv ) cvNamedWindow( "Example2", (...)
• 12:21
  av_free crashes application randomly - FFMPEG C++ - Spamdark Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create a simple media-player for an introduction to the world of ffmpeg, the problem is that every time that I call av_freep(void*ptr) the application crashes. If I don't call av_freep I get a memory leak and the memory used by the program increases up to 1000MB (Already measured), here is the code: int16_t* audioBuffer=(int16_t*)av_malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE+FF_INPUT_BUFFER_PADDING_SIZE); if(!audioBuffer) MessageBox(0,"Error allocating in audioBuffer","Error: Mem",MB_ICONWARNING | MB_OK); return -1; int sz = MEDIA->DecodeAudioFrame((void*)audioBuffer,0); (...)
• 12:58
  Android to ffmpeg preview frame is grayscale [closed] - Estevex Newest 'ffmpeg' Questions - Stack Overflow
  Hi im using android and ffmpeg together to stream to a Wowza Server. In the android part, I have only this: public synchronized void onPreviewFrame(byte[] data, Camera camera) /* get video data */ naStream(data); // native method And on native side using ffmpeg (frame_video is the byte array from android): av_init_packet(&pkt); avpicture_fill((AVPicture *)picture,frame_video,PIX_FMT_YUV420P,640,480); if(ret == 0) LOGI(7,"avpicture_fill -> error %d", ret); /* encode the image */ pkt.data = NULL; pkt.size = 0; ret = avcodec_encode_video2(video_c, &pkt, picture, &got_packet); (...)
• 03:26
  How to compile ffmpeg.c and its dependencies code in Eclipse? - user1914692 Newest 'ffmpeg' Questions - Stack Overflow
  Since there is very limited number of ffmpeg examples, I want to know ffmpeg better through debugging ffmpeg process. So with the downloaded ffmpeg code, I hope to only compile ffmpeg.c (has a main function) with its dependences in Eclipse. But when I put the source in a project of Eclipse, it put out errors as: ‘F_NOCACHE’ undeclared (first use in this function) yuvcmp.c /ffmpegTest/src/tools line 63 C/C++ Problem I failed to find information about F_NOCACHE. Where and how to set its (...)

11 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:04
  MAC's "say" command to MP3 [closed] - ozama Newest 'ffmpeg' Questions - Stack Overflow
  I want to read a very long text with the SAY mac's command (say -f file.txt), and to record the output to file.mp3. I thought about using ffmpeg to record all of it, but then i'll need to wait for all the reading process to complete.. I don't really need to listen to it, so if there is a way to directly have an mp3 file just by hitting enter, it would be great.. There is also this project txt2mp3mac but i can't use it in a shell script.. (...) -- txt2mp3mac
• 22:36
  How can I convert .mp4.avi file to .h263 [closed] - JohnTortugo Newest 'ffmpeg' Questions - Stack Overflow
  I'm doing an experiment and I need .h263 bitstream samples however I didn't find many of them on internet (I would like files which size around 10MB) so I ended up deciding to convert some files from lets say avi or mp4 to .h263 . How can I do that using Linux ?
• 21:46
  Pseudo-streaming mp4 files does not work with flash player - faridv Newest 'ffmpeg' Questions - Stack Overflow
  I've got a problem with streaming audio on my website. I thought I could put the MP3 file inside an MP4 container with h264 codec, so I can use pseudo-streaming ability of mp4 codec. The code I'm using to convert my files is: ffmpeg -i 1.mp3 -y -b:a 32K -vn 1.mp4 Pseudo-streaming (seeking in not-loaded parts of media) now works in HTML5 player but not in any Flash media players such as JWPlayer or FlowPlayer. I've tested my files on both Apache server with h264 module enabled and Nginx with mod_mp4 enabled, but without any lucks. I tried MP4Box, QTIndexSwapper and even (...) -- MP4Box, QTIndexSwapper
• 21:40
  Bad audio output in stereo mode - FFMPEG PortAudio C++ - Spamdark Newest 'ffmpeg' Questions - Stack Overflow
  I'm here again. This time I am working with the audio, I had before some memory leaks issues but now they are solved, this time I am here with a new problem, when I configure portaudio to sound in stereo (channels = 2), the audio outputs in a bad quality. It only outputs good in mono, there is almost no solution in google (Or I am a bad 'googler'), here is the code: Thread that plays audio: int16_t* audioBuffer=(int16_t*)av_malloc(FRAME_SZ_AV); int sz = MEDIA->DecodeAudioFrame(audioBuffer,0); if(sz==1) (...)
• 17:57
  Any way to assign terminal output to variable with python? - Gordon Fontenot Newest 'ffmpeg' Questions - Stack Overflow
  I need to grab the duration of a video file via python as part of a larger script. I know I can use ffmpeg to grab the duration, but I need to be able to save that output as a variable back in python. I thought this would work, but it's giving me a value of 0: cmd = 'ffmpeg -i %s 2>&1 | grep "Duration" | cut -d \\' \\' -f 4 | sed s/,//' % ("Video.mov") duration = os.system(cmd) print duration Am I doing the output redirect wrong? Or is there simply no way to pipe the terminal output back into (...)
• 12:07
  Video as live wallpaper [closed] - user1957355 Newest 'ffmpeg' Questions - Stack Overflow
  I was trying to set this enter link description here compile app on my device, but then i hate test this, show error in application and close. Why? Sorry for my english :L -- enter link description here
• 00:38
  Simple Build of Libavcodec.so and libavformat.so on Mac - Dave Lowerre Newest 'ffmpeg' Questions - Stack Overflow
  Who needs ffmpeg? Not me. What I need is to be able to decode a video stream along with its audio stream, so that can put the frames on an opengl surface in sync with the audio. FFmpeg is a tool that transcodes video. That is not what I need. I need its libraries. The problem is that every example for building FFmpeg includes junk I just dont need. The latest example I wasted my time on: https://github.com/appunite/AndroidFFmpeg uses things like freetype2 that I really, REALLY, do not need. Whats more annoying is that it wont even build as described because the example references (...) -- https://github.com/appunite/AndroidFFmpeg

10 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 13:57
  How to use fig.show=animate in knitr without administrator privileges - Stéphane Laurent Newest 'ffmpeg' Questions - Stack Overflow
  I use Windows without administrator privileges hence I cannot set a path in the Windows PATH variable. The ffmpeg.exe file is in my "U:/ProgramFiles/ImageMagick-6.8.5-5/" folder. I have found how to use the saveVideo() function of the animate package: ani.options(ffmpeg = shQuote('U:/ProgramFiles/ImageMagick-6.8.5-5/ffmpeg.exe')) saveVideo( par(mar = rep(3, 4)) for (i in seq(pi/2, -4/3 * pi, length = 12)) plot(0, 0, pch = 20, ann = FALSE, axes = FALSE) arrows(0, 0, cos(i), sin(i)) axis(1, 0, "VI"); axis(2, 0, "IX") axis(3, 0, "XII"); axis(4, 0, "III"); box() , (...)
• 15:42
  How to enable cookies in ffmpeg HLS - Rodrigo Amaro Reveco Newest 'ffmpeg' Questions - Stack Overflow
  Anyone know how to enable cookie interaction in ffmpeg? I have an HLS stream who need save cookies from the server , but actually that doesn't happen.
• 15:13
  Finding the time of a thumbnail in a video - Liam Newest 'ffmpeg' Questions - Stack Overflow
  I have a large set of pre-generated thumbnails and videos. What is the easiest way to figure out the specific time in the video of the associated thumbnail? I'd imagine that I would have to use something to loop through all the frames in a video to find a match. What libraries should I use? Something like OpenCV maybe? ffmpeg? Python is preferred but not required.
• 14:02
  How to amplify audio in Libav - user1915649 Newest 'ffmpeg' Questions - Stack Overflow
  I use the avcodec_encode_audio() function to encode raw data from microphone, but it is very quiet (all mic settings set to max). Is there a quick way to amplify the audio or I must do it manually with each sample? P.S. AFAIK, ffmpeg has -vol to amplify audio. Can I use it somehow from my C-code (using Libav)? -- Libav
• 11:46
  FFMPEG Custom Read function reads all the data - Hafedh Haouala Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to implement a custom read function for ffmpeg that will retrieve a buffer from local video ( from device in the future) and then deocde this buffer, etc.. So, here's my read function int IORead(void *opaque, uint8_t *buf, int buf_size) FileReader* datrec = (FileReader*)opaque; int ret = datrec->Read(buf, buf_size); return ret; As for the FileReader : class FileReader protected: int fd; public: FileReader(const char *filename) //, int buf_size) fd = open(filename, O_RDONLY); ; ~FileReader() close(fd); ; int Read(uint8_t *buf, int buf_size) int len = read(fd, buf, (...)
• 12:36
  cross compiling OpenCV with ffmpeg support for arm target fails - user2361999 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to cross compile OpenCV with ffmpeg support for mini2440(arm based). The following are the steps i followed. Cross compiled ffmpeg 0.5.1 and successfully created the libraries following this guide.(http://luupkceit.blogspot.in/2011/07/motion-webcam-on-mini2440-this-is.html) ./configure --prefix=/usr --libdir=/lib --datadir=/usr/share --enable-shared --enable-cross-compile --arch=arm --cc=arm-linux-gcc --host-ldflags="-L/rootfs/lib" --host-cflags="-I/rootfs/usr/include" make make install DESTDIR=/install/ffmpeg I downloaded openCV 2.0.0 and ran the the following configure (...) -- http://luupkceit.blogspot.in/2011/07/motion-webcam-on-mini2440-this-is.html, http://pastebin.com/nAV0zyPW
• 12:28
  Live Video Chat for iPhone and HTTP Live Streaming - mayuur Newest 'ffmpeg' Questions - Stack Overflow
  So generally, I want to make an app which has video chat functionality for iPhone. But after many searches, I am still not able to find any successful results. Is there any public or even for that matter, private API available for doing this on iPhone??? If you have an YES answer, please help me. Basically, what I want is to read the streams of the video on both the devices connected for chatting. Thanks a lot in advance and please help me if you can. p.s - I have already checked iDoubs but it failed and always shows some unknown problem and for that reason, doesn't allow me to (...)
• 13:09
  Stream copy given start and end time in ffmpeg - praks411 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying a small program which cuts clip from video file given start and end time. For this I'm doing a simple stream copy of both audio and video stream. I just copied the pts and dts from input packet to output with proper re-scaling. However the output which I'm getting is blank for some duration and then only for last few seconds it is displayed. I thought this could to problem of incorrent pts and dts. So I just manually set pts and dts using counter for each stream. Though I'm able to get the clip but video is very fast and audio goes fine. Please someone explain (...)
• 10:32
  FFMPEG result video freezes in the middle of playback - Revoluzifer Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying stitch four source videos together into one grid. For testing purposes I'm working with a single source flv using this command: ffmpeg -i woohoo.flv -i woohoo.flv -i woohoo.flv -i woohoo.flv \\ -filter_complex "[0:0]pad=iw:ih[a];[1:0]scale=w=iw/2:h=ih/2[b]; [2:0]scale=w=iw/2:h=ih/2[c];[3:0]scale=w=iw/2:h=ih/2[d]; [0:0]scale=w=iw/2:h=ih/2[e];[a][b]overlay=w[x];[x][c]overlay=0:h[y]; [y][d]overlay=w:h[z];[z][e]overlay=0:0" -qscale 1 stitched.avi The stitching itself is working great, but somehow the resulting video does not show as expected. After running for a few frames, (...)
• 07:26
  do not show cmd window in qt project - Heghine Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg command in Qt GUI application (for merging mp3 files into one file). And when I'm running my application the results of merging files showing in cmd window. How can I hide cmd window that users can not see it. QString mergeMp3FilesStr = "ffmpeg -y -i \\"concat:"; /*....some part of code*/ mergeMp3FilesStr+=" \\" -c copy D:\\\\Mp3Files\\\\mergedMp3.mp3" system((const char *)mergeMp3FilesStr.toStdString().c_str()); And so command is looking like this (I'm viewing result with QDebug): ffmpeg -y -i "concat:D:\\Mp3Files\\a.mp3|D:\\Mp3Files\\a.mp3|D:\\Mp3Files\\a.mp3 " -c copy (...)

9 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 17:39
  Can't record S-Video with avconv - Ertain Newest 'ffmpeg' Questions - Stack Overflow
  I've been trying to record feed from my S-Video cable using avconv. I am able to record composite video with avconv, but the quality isn't the best. To set the input, I use v4l2-ctl -i $n, where $n is either 0 for composite, or 1 for S-Video. I tried to use v4l2-ctl -i 1 to set the input, but that doesn't work. Oddly enough, when I use tvtime or qv4l2 I can view the video. I am able to record audio, just not the video. In tvtime I can get audio as well as video. Also, I was able to record the S-Video with ffmpeg using the -channel option. ffmpeg, btw, can't record the (...)
• 21:45
  How to generate SDP file from FFMPEG - MobilityLab Newest 'ffmpeg' Questions - Stack Overflow
  So, I have been working with FFMPEG on a project that involves streaming video from one computer to another across the internet with RTP. I want to take that into ffmpeg and use ffserver to display it on a local network. As I understand it, you need to have a SDP information so that the receiving ffmpeg instance can interpret the RTP stream. Despite what webpages say, I can not find the SDP information in the information printed to the console. How can I force the transmitting ffmpeg instance to output the SDP information so that I can use it to configure my receiving end? Right now, I (...)
• 21:34
  mediastreamsegmenter stops sending id3 metadata using HLS - alawson421 Newest 'ffmpeg' Questions - Stack Overflow
  I am using a combination of ffmpegand Apple's mediastreamsegmenter and id3taggenerator to create a HLS stream with metadata (ID3) embedded in it. I have all of the applications running and am able to retrieve the metadata out of the stream on the client side, but the issue is that after what seems like a random amount of time, the client stops receiving metadata on the stream. Here is what I have working now: This is the ffmpeg and mediastreamsegmenter part: ffmpeg -i udp://ⓐ:5010 -c:v libx264 -crf:v 22 -b:v 500k -preset:v veryfast -c:a libfdk_aac -b:a 64k -f mpegts - | (...)
• 20:28
  FFMpeg RTP streaming error [closed] - SEARAS Newest 'ffmpeg' Questions - Stack Overflow
  I want to broadcast a video file via FFMpeg , but I get error: Only one stream supported in the RTP muxer I get that error when i write this: ffmpeg.exe -i SomeVideo.mp4 -f rtp rtp://127.0.0.1:11111 I don't know what's wrong. Please, help.
• 21:14
  Why rtp streaming of a .avi video file fails to be received? - user1914692 Newest 'ffmpeg' Questions - Stack Overflow
  In ffmpeg streamingGuide, it writes: ffmpeg -re -f lavfi -i aevalsrc="sin(400*2*PI*t)" -ar 8000 -f mulaw -f rtp rtp://127.0.0.1:1234 & ffplay rtp://127.0.0.1:1234 I want to use a real video file to replace the artificial signal. Then I write the below at terminal A: ffmpeg -re -i outputFile.avi -f mulaw -f rtp rtp://127.0.0.1:1234 it seems it is working: The frame information is counting. Here are information on the terminal A at the end: frame= 309 fps= 29 q=31.0 Lsize= 931kB time=00:00:10.30 bitrate= 740.8kbits/s video:922kB audio:0kB subtitle:0 global headers:0kB muxing overhead (...) -- ffmpeg streamingGuide
• 20:52
  stream h264 over rtp using ffmpeg [closed] - Jordi Rey Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to stream with RTP a video coded with h264. I would like to know the command to stream, for example, a video called video.avi to ⓐ127.0.0.1:5004. I guess there's no need to transcode it, because it's already with h264 codec. Also, which would be the command to play it? I guess i have to use the ffplay, right? Thanks in advance, JRey
• 16:16
  How can I acheive the best overall FLV quality with FFMPEG? - dcolumbus Newest 'ffmpeg' Questions - Stack Overflow
  First of all, FFMPEG has the worst documentation of all time, and secondly, the syntax is so trivial that it's often hard to understand what some lines are doing. What I'm looking to accomplish would be the best quality FLV with the lowest file size. After all, isn't that everyone's goal? These videos will be streamed if that makes any difference. Do any of you have some command lines that could do this? For now, my video(s) are no wider than 320px, and some are widescreen, so their heights are a little smaller than 240px. As it stands, the quality of the converted FLVs (...)
• 03:35
  How do I properly format a request for ffmpeg to decode using a particular codec? [migrated] - user2062660 Newest 'ffmpeg' Questions - Stack Overflow
  r3d is listed as a supported codec for decoding, however when I attempt to specify the r3d decoder, I get the error message "Unknown decoder". What is the correct manner of specifying a decoder codec? me$ ffmpeg -c r3d -i one.r3d one.mpg ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers built on May 8 2013 19:48:08 with Apple clang version 4.0 (tags/Apple/clang-421.0.57) (based on LLVM 3.1svn) configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample (...)
• 02:24
  setting a correct ffmpeg GOP (group of pictures) [closed] - Robert Cantarutti Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg to ser the GOP (Group of pictures) with mpeg4. I had success to set a GOP of: -12,2 (12 frames between two I frames, and 2 frames between each P frames) -15,2 -18,2 -30,2 And I had not success in this cases: -8,2 -4,2 1- Example to set a GOP of 12,2: ffmpeg -s cif -r 30 -i video.yuv -vcodec mpeg4 -g 12 -bf 2 -sameq video.m4v 2-Example to set a GOP of 8,2: ffmpeg -s cif -r 30 -i video.yuv -vcodec mpeg4 -g 8 -bf 2 -sameq video.m4v The result of (1) - ok: $ head trace ... 11 H 20313 14 0.43 12 B 10752 8 0.43 13 B 10718 8 0.43 14 P 12643 9 0.529 15 B 11338 8 0.529 16 B (...)
• 11:13
  looking for Wowza RTMP client on iOS [closed] - user2365591 Newest 'ffmpeg' Questions - Stack Overflow
  i will need to developed a chat application based on wowza server and im looking for RTMP client open source for iOS or maybe some other open source that use FFMPEG open source thanks in advanced Asaf
• 05:13
  Unable to compile i386 compatible ffmpeg dylibs on Mac OS X - simon.d Newest 'ffmpeg' Questions - Stack Overflow
  I'm running 64-bit Lion but I need to compile a 32-bit version of ffmpeg because another library I'm using is only available as 32-bit. I've tried a number of different configurations but they're all giving me errors. Here's what I've tried: ./configure --disable-static --enable-shared --disable-outdev=sdl --disable-bzlib --disable-libfreetype --disable-libopenjpeg --enable-zlib --enable-runtime-cpudetect --arch=i386 --extra-cflags="-arch i386" --extra-ldflags="-arch i386" --target-os=darwin --enable-cross-compile ./configure --disable-static --enable-shared (...)

8 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 19:16
  FFmpeg: Generating .ts files and adding Metadata to them [closed] - Jonovono Newest 'ffmpeg' Questions - Stack Overflow
  Before I was following the steps: Create some metadata: id3taggenerator -o 1.id3 -artist "Emma Stone" id3taggenerator -o 2.id3 -artist "Patricia Clarkson" Create a file saying where to place the metadata in the file: 68 id3 /path/to/file/1.id3 78 id3 /path/to/file/2.id3 Segment the files and include the metadata mediafilesegmenter -f video -M meta.txt video.mp4 More detail: http://jmacmullin.wordpress.com/2010/11/03/adding-meta-data-to-video-in-ios/ I want to do something similar to this, but with FFmpeg. I am also wondering if I could first segment the file into .ts files and add (...) -- http://jmacmullin.wordpress.com/2010/11/03/adding-meta-data-to-video-in-ios/
• 17:09
  mix audio with h264 mp4 video with ffmpeg [migrated] - user2362912 Newest 'ffmpeg' Questions - Stack Overflow
  I have 2 files : Input #0, wav, from '105426_1.wav': Duration: 00:00:09.98, bitrate: 1312 kb/s Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 41000 Hz, stereo, s16, 1312 kb/s and: Duration: 00:00:41.29, start: 0.000000, bitrate: 1313 kb/s Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 1211 kb/s, 24.42 fps, 25 tbr, 90k tbn, 48 tbc Metadata: handler_name : VideoHandler Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 99 kb/s Metadata: handler_name : SoundHandler I want to insert first (...)
• 15:37
  How can generate thumbnail with timestamp with ffmpeg [closed] - Juneyoung Oh Newest 'ffmpeg' Questions - Stack Overflow
  I am working with ffmpeg. I made some thumbnails with ffmpeg command like below. ffmpeg -ss 600 -i input.mp4 -s 420x270 -f mjpeg vframes 1 output.jpeg but it is just plane photo. What I need is some thumbnail like youtube thumbnail which has time positions on picture. If you have any challenging ideas, please let me try. Thanks.
• 10:00
  How to set x264 encode parameters through ffmpeg AVCodecContext - songqi Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use ffmpeg/libx264 to encode and transmit a realtime video, when I use **av_dict_set(&opts, "tune", "zerolatency", 0); ** the system works well. As the X264 encode parameters are set by ffmpeg using av_dict_set, for some research purpose I want to change them by myself. But some parameters in x264_param_t can not correspond to those parameters in AVCodecContext, such as vfr_input. So I want to know if there is a directly way to transmit parameters into X264 encoder when using libx264 in ffmpeg. Can anyone help me? (...)
• 02:40
  How to convert audio/music to video with static image (commandline) [closed] - lefterav Newest 'ffmpeg' Questions - Stack Overflow
  I have an audio file which I would like to convert to a video. If possible, I would like to use a static image for appearing at the video. I have investigated a couple possible solutions, but non of them is fully functional. This solution in previous thread ffmpeg -loop_input -shortest -y -i image8.jpg -i sound11.mp3 -acodec copy -vcodec mjpeg result.avi does not work any more, as it does not extend the video to the duration of the audio file. Additionally, ffmpeg complains that it is deprecated and suggests to use avconv instead. avconv -i sound11.mp3 -strict experimental -i 341410.jpg (...)
• 01:55
  mp4 with pixel format yuvj420p won't play in Chrome 17, but plays in Safari, IE etc - marca Newest 'ffmpeg' Questions - Stack Overflow
  File is from a Nikon D3s (mov) converted with ffmpeg to mp4. Working without problems with all other files (avi, flv, mp4 etc) Please see file: http://shootitlive.s3.amazonaws.com/output.mp4 (Same non working result in Chrome when served from diffrent hosts, and always works in Safari and with flash in Firefox, Chromium) /usr/local/bin/ffmpeg -i nonworking.MOV -acodec libfaac -ab 128k -vcodec libx264 -preset slow -crf 30 -threads 0 -s 768x576 -aspect 1.33333333333 -ar 48000 output.mp4 Cant find anything strange with (but dont really know what to look for): ffmpeg -v 5 -i filename -f (...) -- http://shootitlive.s3.amazonaws.com/output.mp4

7 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:52
  g++ Linking Error on Mac while compiling FFMPEG - Saptarshi Biswas Newest 'ffmpeg' Questions - Stack Overflow
  g++ on Snow Leopard is throwing linking errors on the following piece of code test.cpp #include using namespace std; #include // required headers #include int main(int argc, char**argv) av_register_all(); // offending library call return 0; When I try to compile this using the following command g++ test.cpp -I/usr/local/include -L/usr/local/lib \\ -lavcodec -lavformat -lavutil -lz -lm -o test I get the error Undefined symbols: "av_register_all()", referenced from: _main in ccUD1ueX.o ld: symbol(s) not found collect2: ld returned 1 exit status Interestingly, if I have an equivalent c (...)
• 17:28
  Encoding H.264 video using FFmpeg C API - GummiB Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to encode a H.264 video with the FFMPEG C API. I have successfully compiled and executed the decoding/encoding example provided by FFMPEG. The problem I'm facing is that the .mpg file (encoded with AV_CODEC_ID_MPEG1VIDEO) the example creates works. Windows creates a thumbnail and everything. On the other hand the .h264 (encoded with AV_CODEC_ID_H264) file does not. When I try to play the file in VLC the play/pause button just flickers, no thumbnail in windows, no nothing. During encoding libx264 reports the following: [libx264 ⓐ 004b81a0] using cpu capabilities: MMX2 (...) -- decoding/encoding example
• 17:08
  FFMpeg receives single connection with multiple bitrates? - leandro moreira Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use ffmpeg to serve hls streaming, as source of the streaming I'm using FMLE to output multiple bitrate by RTMP. I know that we can output several bitrates/sizes, as the example bellow, but I would like to know if ffmpeg is able to handle a input (rmtp generated from FMLE) with multiple bitrates too? How about the master list? (the m3u8 pointing to the other bitrates m3u8) By the way, how are you guys dealing with failover? ffmpeg -i rmtp://xserver/live \\ -b:v 250k out-250.m3u8 \\ -b:v 500k out-500.m3u8 \\ -b:v 700k (...)
• 16:56
  I am really confused with this kind of compilation error( C ffmpeg Qt) - David Tree Newest 'ffmpeg' Questions - Stack Overflow
  I downloaded the latest ffmpeg source code and successfully installed it on Ubuntu But I failed to compile a simple demo.(I did included proper headers) Here are the error messages ,just to name a few: error: unknown type name 'AVFrame' error: 'NULL' undeclared (first use in this function) error: request for member 'streams' in something not a structure or union error: 'AVMEDIA_TYPE_VIDEO' undeclared (first use in this function) error: expected expression before ')' token Can you help me solve this problem? Contents Added: e.g this is my (...)
• 13:06
  Use build_libstagefright in ffmpeg to build file .so for android - OneGuilty Newest 'ffmpeg' Questions - Stack Overflow
  In order to use ffmpeg in android , I tried to build ffmpeg by using build_libstagefright in ffmpeg/tools/lib_stagefright but it alwalys appear a error which i coundn't solve it. the message in the bottom of ffmpeg/config.log is arm-linux-androideabi-g++ -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -I../android-source/frameworks/base/include -I../android-source/system/core/include -I../android-source/frameworks/base/media/libstagefright -I../android-source/frameworks/base/include/media/stagefright/openmax (...)
• 10:23
  Transition effects between images using ImageMagick and FFMPEG [closed] - user1599914 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to generate a video using still images. I'm using Image Magick's convert command to duplicate the images. convert screen6.png -duplicate 10 -background black -gravity center -extent 1024x576 4%06d.screen.transition.png I then use ffmpeg to encode the images. Problem 1: How can I achieve good transition effects between the images; effects such as circle in, box out, wheel, as well as kenburns effect. Problem 2: How can I overlay the images with text, and make that text to animate or appear with some effects such as fade in, zoom out. Your help will be greatly (...)
• 09:17
  .So file for FFMPEG from NDK - Nikhil Lamba Newest 'ffmpeg' Questions - Stack Overflow
  I am not able to make .So file for FFMPEG from NDK . I Just Download a zip file from GitHub https://github.com/appunite/AndroidFFmpeg Then i used CYGWIN for using NDK commends for making .so file from jni folder in ffmpeg library then on Cygwin i am giving path of ffmpeg up to jni folder then $ ndk build after some process error message came C:\\Users\\ADMIN\\Downloads\\AndroidFFmpeg-master\\AndroidFFmpeg-master\\FFmpegLibrary \\jni>ndk-build Android NDK: ERROR:C:/Users/ADMIN/Downloads/AndroidFFmpeg-master/AndroidFFmpeg-m aster/FFmpegLibrary//jni/Android.mk:ffmpeg-prebuilt: LOCAL_SRC_FILES (...) -- https://github.com/appunite/AndroidFFmpeg
• 11:15
  Decode wma and wmv codecs usning ffmpeg - sajad Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to receive a http stream from an analog camera that is connected to hardware encoder. The codec of http stream is wma3 for audio and wmv2 for video. I can't do this maybe because ffmpeg doesn't support these codecs. However I can receive and play the stream using vlc media player. I think I have to compile the source code of ffmpeg by some special configuration. Maybe I need some software libraries to satisfy dependencies. Can anyone guide me what libraries include these two codecs and what options I have to enable when I want to configure and make the ffmpeg project (...)
• 09:28
  compiling errors with ffmpeg on linux [closed] - David Tree Newest 'ffmpeg' Questions - Stack Overflow
  Hi all ,I downloaded the latest ffmpeg source code and successfully installed it on Ubuntu But I failed to compile a simple demo. This was created with QtCreator with the .pro file as follows: QT -= gui TARGET = qt_v4l2 TEMPLATE = app SOURCES += \\ ../tutorial01.c LIBS += -L/-lavcodec -lavformat -lswscale -lavutil Here are the error messages ,just to name a few: ../tutorial01.c:22:16: error: unknown type name 'AVFrame' ../tutorial01.c:55:5: error: unknown type name 'uint8_t' ../tutorial01.c:68:50: error: 'NULL' undeclared (first use in this function) (...) -- https://github.com/phamquy/FFmpeg-tutorial-samples/blob/master/tutorial01.c
• 04:46
  OpenCV VideoCapture cannot read video in Python but able in VS11 - Alvin Then Newest 'ffmpeg' Questions - Stack Overflow
  As title, I am not able to read video using VideoCapture in python with the following code: v = 'C:\\\\test.mp4' import cv2 cap = cv2.VideoCapture(v) if cap.isOpened(): print "Finally" else: print "BOOM" BOOM is always being printed. sigh Whereas in VS11, the following code works: #include "stdafx.h" #include #include using namespace cv; using namespace std; int main(int argc, char* argv[]) string v = "C:\\\\test.mp4"; VideoCapture cap; cap.open(v); if (cap.isOpened()) cout I do realize there's a number solution in SO, but nothing works for me. I have the following dlls in (...)
• 04:21
  Encoding a video in FFmpeg to X264 and have it playable in Quicktime - illu Newest 'ffmpeg' Questions - Stack Overflow
  I am wondering which command line settings i need to explicitly set (or avoid) to make a video encoded into x264 (in the mp4 format) using ffmpeg by default playable in Quicktime. I find that a number of the predefined preset files work for me but some of them won't, for example I can't get any of the lossless ones to work and I'm interested in those ones as well. For example libx264-lossless_max.ffpreset will encode my video but it's only playable in VLC, not in Quicktime. In Quicktime the video stays black. I know Perian is an option but I want my file to be playable (...)

6 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:07
  Concat videos with ffmpeg does not work [migrated] - Yannick Schinko Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently trying to concat 3 Videos which don't have a audio stream and adding a audio file in the same step. I created this command which should do the work: ffmpeg -y -r 30 -i data\\intro.mp4 -vcodec ppm -f image2pipe -i data\\render.ppm -i data\\outro.mp4 -i "data\\I could be the one.mp3" -c:v libx264 -crf 18 -preset slow -pix_fmt yuv420p -c:a copy -filter_complex "[0:0] [1:0] [2:0] concat=n=3:v=1:a=0 [v]" -map [v] -map 3:0 -shortest -metadata title="Development of BrainStoneMod" -metadata description="This is the development of the BrainStoneMod starting from 08th April, (...)
• 16:58
  Error scaling a video using libav filters [closed] - Saptarshi Biswas Newest 'ffmpeg' Questions - Stack Overflow
  I need to batch-process a bunch of videos to scale their height to 240 keeping the aspect ratio same. The command that gets the job almost done is: $ avconv -threads 4 -ss 0.0 -i input.avi \\ -map 0:0,0:0 -map 0:1,0:1 -vf "scale=-1:240" -y -f mpegts \\ -async -1 -vcodec libx264 -vcodec libx264 -flags2 +fast \\ -flags +loop -g 30 -bufsize 1024k \\ -b 200k -bt 220k -qmax 48 -qmin 2 -r 20 -acodec libmp3lame \\ -ab 44k -ar 44100 -ac 2 output.ts The interesting part, as you can see, is -vf "scale=-1:240" This works on videos where the scaled output width turns out to be an even number. Otherwise, (...) -- link
• 17:28
  FFmpeg into Qt 5.0.2: exit code -1073741515 on av_register_all(); - Nifty255 Newest 'ffmpeg' Questions - Stack Overflow
  I am attempting to integrate FFmpeg into my Qt app. I used the FFmpeg git-0fb64da 64-bit Dev source from Zeranoe FFmpeg builds page and added avformat.lib to my project. My .pro file: unix|win32: LIBS += -L$$PWD/../../FFmpeg/ffmpeg-20130428-git-0fb64da-win64-dev/lib/ -lavformat INCLUDEPATH += $$PWD/../../FFmpeg/ffmpeg-20130428-git-0fb64da-win64-dev/include DEPENDPATH += $$PWD/../../FFmpeg/ffmpeg-20130428-git-0fb64da-win64-dev/include I included libavformat/avformat.h inside the "extern "C"" block. As long as I don't call av_register_all(), this all works fine, but once I do, my app (...) -- Zeranoe FFmpeg builds page
• 18:17
  Decode audio and video and process both streams -- ffmpeg, sdl, opencv - Eric Newest 'ffmpeg' Questions - Stack Overflow
  My goal is to proceed on audio and video of mpeg-2 file independently, and to keep synchronicity on both flows. Duration of video is about 1 or 2 minutes maximum. First, following this post "opencv for reading videos (and do the process),ffmpeg for audio , and SDL used to play both" sounds perfect. I have done some modification on the code considering recent ffmpeg naming changes. Compilation with cmake on 64-bits machine is fine. I get an error "Unsupported codec [3]" when opening codec. The code is following. Second, I looking for code dealing with synchronicity on both flows. (...)
• 10:38
  How to limit FFMpeg CPU usage? Threads? [closed] - forg4t Newest 'ffmpeg' Questions - Stack Overflow
  I read lot of forum comment how to limit ffmpeg cpu... many people wrote to use this formula : nice -n 10 or 20 it's ok. But I don't know what number should be use in ffmpeg threads? 0 or 1, 2, 3 I don't know. I would really appreciate your help! I checked the system data: server:~ # lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 2 On-line CPU(s) list: 0,1 Thread(s) per core: 1 Core(s) per socket: 2 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 37 Stepping: 1 CPU MHz: 3066.775 BogoMIPS: 6133.55 (...)
• 13:38
  Android FFMPEG doesn't recognize file: protocol - kev Newest 'ffmpeg' Questions - Stack Overflow
  I'm running an android ffmpeg build through the Runtime.getRuntime().exec() command Problem is that when i specify the input as a file i get this error: E/MainActivity(18168): file:/mnt/sdcard/young.flv: Protocol not found Initially i just specified the file name without the "file:" prefix and still get the same error. How can i specify input files?
• 09:11
  ffmpeg: 1 image + 1 audio file = 1 video [closed] - matteo Newest 'ffmpeg' Questions - Stack Overflow
  This should be pretty trivial but I can't find a way to get it to work. I want ffmpeg to take one jpg image and an audio file as input and generate a video file of the same duration as the audio file (by stretching the still image for the whole duration). I don't care very much about what video codec is used for output but it is vital that I can use "copy" as the audio codec (i.e. copy the audio stream without transcoding it). What is the right command line that would do that? I tried: ffmpeg -i image8.jpg -i sound11.amr -acodec copy test.avi and tried a lot of combinations (...)
• 01:30
  task scheduler windows wampserver [closed] - user2321982 Newest 'ffmpeg' Questions - Stack Overflow
  well I've been researching task scheduler, I found the cron to linux, I wonder if it has any windows. I want to run a script in php every 15 seconds, which is the case in video conversion, and if I was to convert the video to wait over, eg a row, 5 conversions maximum The script uses a function videoscreen up and calls the command prompt to convert.
• 02:31
  Why AVFormatContext pointer is initialized in a non-global struct object, while NULL in a global object? - user1914692 Newest 'ffmpeg' Questions - Stack Overflow
  The code is almost similar to filtering _video.c, one example code in ffmpeg doc. In the original example file, there are many global static variables. Here is one snippet of the 1st version code (same as the original sample): static AVFormatContext *fmt_ctx; static AVCodecContext *dec_ctx; int main(int argc, char **argv) // .... other code if ((ret = avformat_open_input(&fmt_ctx, filename, NULL, NULL)) Since all these variables serve for open a video file, I prefer to group them. So the purpose of my code is to rearrange these variables, making the source file more structed. The (...)
• 02:23
  ffmpeg watermark transparent background - ionutvmi Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to add a watermark to a video file but i'm having problems with the background of the watermark because i want it to be transparent. My approach is like this: i make a png file the size of the video with transparent background like this $im = imagecreatetruecolor($width, $height); $almostblack = imagecolorallocate($im,254,254,254); imagefill($im,0,0,$almostblack); $black = imagecolorallocate($im,0,0,0); imagecolortransparent($im,$almostblack); $textcolor = imagecolorallocate($im, 255, 0, 0); // Write the string at the top left imagestring($im, 5, 0, 0, 'Hello (...)

5 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 19:49
  Using Coldfusion's CFFILE tag to monitor a progress log from FFMpeg - user1493918 Newest 'ffmpeg' Questions - Stack Overflow
  I want to learn how to use the CFFILE tag from ColdFusion to read the contents of a text file. In my case, that text file is a progress log that is generated by FFMpeg while it transcodes a media file. I want to write a ColdFusion script that will poll the progress log periodically, until the log indicates that FFMpeg has finished its transcoding operation. On the client side I can then use Ajax to hit that ColdFusion script and show the user a "percentage completed" while FFMpeg does its work. I got FFMpeg to generate the log file by using a new "progress" flag that recent versions of (...)
• 16:49
  mplayer generating online three thumbnail of video - soac Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create thumbnail of video using mplayer but it is only creating 3 thumbnail of video and then repeating the last thumbnail again and again. MPlayer command 1: mplayer video/1.mp4 -sstep 5 -endpos 25 -nosound -vf scale=96:64 -vo jpeg:quality=80:outdir=$tmpPath 2>log.txt Problem: It create 3 different image and then repeat last image again and again. MPlayer command 2: mplayer video/1.mp4 -sstep 5 -endpos 25 -nosound -frames 5 -vf scale=96:64 -vo jpeg:quality=80:outdir=$tmpPath 2>log.txt Problem: It create 3 different image and then repeat last image 2 times, If I change (...) -- http://sourceforge.net/projects/smplayer/files/
• 13:08
  Green screen writing FLV file libavformat - YYZ Newest 'ffmpeg' Questions - Stack Overflow
  I've written a piece of C++ code that can capture webcam video frame, decode them, convert them to YUV420P, encode them and then write them to a file. If I use the mpeg2 codec and write to a .mpg file, everything works perfectly. But, if I use flv, then the output produced is just a green screen. I'm not sure if there are different encoder settings I need to set for encoding flv video? Here's my code(the relevant parts): Encoder settings: c->codec_id = codec_id; c->bit_rate = 400000; // Resolution must be a multiple of two. c->width = 352; c->height = 288; c->time_base.den = (...)
• 12:08
  Can the frame size be cropped during decoding using libavcodec? - James491 Newest 'ffmpeg' Questions - Stack Overflow
  I've followed Dranger's tutorial for displaying video using libav and FFMPEG. http://dranger.com/ffmpeg/ avcodec_decode_video2 seems to be the slowest part of the video decoding process. I will occasionally have two videos decoding simultaneously but only displaying half of each video side by side. In other words, half of each video will be off-screen. In order to speed up decoding, is there a way to only decode a portion of a frame? -- http://dranger.com/ffmpeg/

4 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 20:50
  ffmpeg screenshot ISO Files [closed] - user1825932 Newest 'ffmpeg' Questions - Stack Overflow
  Hi i try to make screenshot of DVD iso file with ffmpeg. With other file type, like avi or mkv, it work fine. I use ffmpeg with ubuntu 10.4 and I use this command: ffmpeg -ss 0:05:00 -i /home/Videofile -sameq -vframes 1 -t 00:00:02 -f image2 /home/image1.png But with iso file it's not working. Any advice? Thanks EDIT This is the output: ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Apr 2 2013 17:02:36 with gcc 4.6.3 *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be removed in a (...)
• 18:51
  Unable to convert .mp3 to .m4a using ffmpeg [closed] - rahulg Newest 'ffmpeg' Questions - Stack Overflow
  I am fully aware the legal constraints in using libfaac but this is just for my testing purpose. I have compiled ffmpeg with faac enabled. So when I tried to convert an .mp3 to a .m4a here is the error that I am getting. Please provide a resolution to this problem. I tried it on two different sources of .mp3, still I am getting the same error. [userⓐip-10-161-13-26 ~]$ ffmpeg -i Kalimba.mp3 -c:a libfaac Kalimba.m4a ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers built on May 4 2013 09:33:27 with gcc 4.4.6 20120305 (Red Hat 4.4.6-4) configuration: --enable-libfaac (...) -- http://db.tt/HtpEBpFU
• 23:52
  Video has no audio when played using HTML5 - vertigoelectric Newest 'ffmpeg' Questions - Stack Overflow
  I have a media site where I can upload video files. After upload, they are converted to MP4 using ffmpeg and then ffmpeg2theora converts that to OGV. I have recently discovered that some videos that I upload do not play any sound when using the HTML5 player in Firefox/Chrome, but do have sound when using the fallback Flash player in IE. I've downloaded and checked the processed files and they both still have sound, so the issue seems to be related to the HTML5 player rather than loss of audio during processing. I double-checked my ffmpeg command line and realized I didn't (...)
• 22:07
  ffmpeg copying rtmp stream, but without audio - piowit Newest 'ffmpeg' Questions - Stack Overflow
  I am sending stream to flash media server from Adobe Flash Media Live Encoder and I am trying to copy this stream to another FMS using FFmpeg ffmpeg -analyzeduration 0 -i "rtmp://x.x.x.x/live/stream1 live=1" \\ -vcodec copy -acodec copy -f flv rtmp://y.y.y.y/live/stream1 but there is no audio. Can anyone help me?
• 19:35
  ffmpeg watermark first 30 second - ncs Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg -i v.3gp -acodec copy -vf "movie=w.png [logo]; [in][logo] overlay=10:main_h-overlay_h-10 [out]" nv.3gp It work's fine, but i want watermark only first 30 seconds. Any ideas?
• 16:00
  Android audio processing using ffmpeg? - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  I am develloping my own android media player ,so i opted for ffmpeg for decoding, i've successfully decoded and rendered video but there is no sound now i don't know how to add audio decoding audio to my video decoding and even how to decode a simple audio file and then render it in android using jni.what instruction i have to use (Avframe openinput and then what) Thanks in advance
• 14:57
  Using ffmpeg convert a file from one format to another - Pannu Newest 'ffmpeg' Questions - Stack Overflow
  I'm new to ffmpeg and I was trying to find out how to convert a audio or video file from one format to another. I don't want to use CLI, I just want to know if I can use ffmpeg as a library and call a function to convert a file from one format to another. I went through the documentation and found functions avcodec_encode_audio and avcodec_encode_video but its not clear how I can use this to convert. A tutorial or an example will be very (...)
• 13:53
  Lossless ffmpeg conversion/encoding - Marc Brown Newest 'ffmpeg' Questions - Stack Overflow
  I'm looking for the best in quality when converting videos. I only want to use lossless audio and video encoders and a good container. How do I enable lossless x264 vcodec for ffmpeg? I currently use ffmpeg -i "inputvideo" -s 1280x720 -ar 48000 -threads 4 -vcodec libx264 -acodec copy -dsur_mode 2 -ac 6 "outputvideo720p.mkv" I plan on using flac for the acodec by am unsure because I don't want to use quality if it switches to 16-bit instead of (...)
• 09:50
  save FFMPEG screenshot output file to variable - dodgerogers747 Newest 'ffmpeg' Questions - Stack Overflow
  How can i get the output file of this FFMPEG code saved to a variable? def take_screenshot logger.debug "Trying to grab a screenshot from #self.file" system "ffmpeg -i #self.file -ss 00:00:02 -vframes 1 #Rails.root/public/uploads/tmp/screenshots/#File.basename(self.file).jpg" self.save! end I have tried: self.screenshot = system "ffmpeg -i #self.file -ss 00:00:02 -vframes 1 #Rails.root/public/uploads/tmp/screenshots/#File.basename(self.file).jpg" but this doesn't save anything. thanks in (...)
• 08:13
  Flash video streaming in iOS - Ghazanfar Ali Newest 'ffmpeg' Questions - Stack Overflow
  i am trying to make a web browser app for iOS. upto now i am able to to browse desktop version of websites in it and play iOS competible videos also. But i want to have support for flash videos alos. my inspiration is vBrowse and according to there statement they are using "FFmpeg" and "librtmp" in their app. so can anyone help me to implement this library so that my browser would support swf/flv videos. Bundle thanx in advance for any help. -- vBrowse, statement

3 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 20:11
  "File doesn't exist" - streamio FFMPEG on screenshot after create method - dodgerogers747 Newest 'ffmpeg' Questions - Stack Overflow
  I have videos being directly uploaded to S3 using Amazon's CORS configuration. Videos are uploaded via a dedicated S3 form, once they have been uploaded successfully the URL of the video is appended to the ⓐvideo.file hidden_field via javascript and then the video saves. I can't get this after_save method to work which takes a screenshot of the video and saves it to S3 via carrierwave after the video has been saved as a rails object. ( It was previously working using a carrierwave video upload instance ) It errors out withErrno::ENOENT - No such file or directory - the file (...)
• 18:17
  Scaling YUV420P with libswscale - getting gray image out - spartygw Newest 'ffmpeg' Questions - Stack Overflow
  I've got a basic understanding of the format of YUV420p data. I understand it's in planes and that the Y data is basically black & white luma and should be width*height pixels in length. The U and V planes I believe to be width*height/4 in size for each plane. So with all that knowledge, I'm trying to scale a yuv420p imag using libswscale. The output image is gray, like I'm missing the U and V planes. Here's what I'm doing: int src_stride[3] = 0, 0, 0; src_stride[0] = mInputWidth; src_stride[1] = mInputWidth / 4; src_stride[2] = mInputWidth / 4; const (...)
• 17:48
  How to transcode video stream by changing only the resolution? - user1051417 Newest 'ffmpeg' Questions - Stack Overflow
  I would like to transcode video stream using ffmpeg tool and change only the video stream resolution, i.e. the video and audio parameters should remain the same. According to the man page of the ffmpeg the following command line should provide the desired result: ffmpeg -i input.mp4 -vcodec copy -acodec copy -s WxH output.avi The Video codec of the input stream is compatible with avi container. The actual result is that the resolution remains unchanged and it seems that the stream is just repacked in avi container. The resolution of the output stream is changed successfully without (...)
• 19:45
  FFMPEG fails to run using exec() or shell_exec() in PHP - Richard Kriesman Newest 'ffmpeg' Questions - Stack Overflow
  So I've been working on trying to get FFMPEG to encode videos that are uploaded to my site. The upload script calls the PHP binary using exec() to run a script called encode.php that looks like this: include("include/config.inc.php"); $videoID = $argv[1]; exec("ffmpeg -i " . $_SERVER['DOCUMENT_ROOT'] . "/processing/" . $videoID. ".mp4 -vcodec libx264 -vpre normal -s 1280x720 -r 30 -acodec libfaac " . $_SERVER['DOCUMENT_ROOT'] . "/videos/" . $videoID . ".mp4"); $connect = mysql_connect($dbhost, $dbusername, $dbpassword); mysql_select_db($dbname, $connect); $query = (...)
• 19:38
  Adding a color filter at specific intervals in ffmpeg - JamieL Newest 'ffmpeg' Questions - Stack Overflow
  I am looking to add the color filter to a rtmp stream in ffmpeg at specific time intervals, say for 10 seconds every 10 seconds. I have tried two approaches. The first: -vf "color=#8EABB8ⓐ0.9:480x208,select='gte(t,10)*lte(t,20)' [color];[in][color] overlay [out]" This streams only the 10 seconds indicated by the select and applies the color filter rather than playing the whole stream and applying the filter to just those 20 seconds. I then learnt about split and fifo and tried this approach: -vf "[in] split [no-color], fifo, [with-color] overlay [out]; [no-color] fifo, (...)
• 18:26
  FFmpeg can't decode H264 stream/frame data - Gediminas Newest 'ffmpeg' Questions - Stack Overflow
  Recently I had chance to work with two devices that are streaming the H264 through RTSP. And I've ran into some problem trying to decompress this stream using FFmpeg library. Every time the "avcodec_decode_video2" is called - FFmpeg just says something like: [h264 ⓐ 00339220] no frame! My raw H264 stream I frame data starts like this: "65 88 84 21 3F F8 F8 0D..." (as far as I understand this 0x65 indicates that it's a IDR frame?) Other frames for one device starts like: "41 9A 22 07 F3 4E 48 CC...." and for other device - like this: "61 9A 25 C1 1C 45 62 39...." Am I missing (...)
• 14:35
  ffmpeg brew yasm - Johann Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to install ffmpeg via brew. It error I get with yasm is "Error: You must `brew link pkg-config yasm' before ffmpeg can be installed" When doing so I'm told that my permissions are insufficient. "Linking /usr/local/Cellar/pkg-config/0.28... Warning: Could not link pkg-config. Unlinking... Error: Permission denied - /usr/local/share/doc" The permissions are -rw-rw--- . I've tried unlinking yasm package and then redoing it with no luck. Any (...)
• 11:14
  What transcoding services can people recommend? [closed] - Adrian Lynch Newest 'ffmpeg' Questions - Stack Overflow
  A client of mine needs to accept a bunch of different video files and convert them to FLV. My experience with FFMEG on a previous project has highlighted that there will be some troublesome files. Depending on the price my client will pay for a professional service. What are people using and how are you finding the service? Thanks.
• 08:12
  FFMPEG not found at my local server - user2319553 Newest 'ffmpeg' Questions - Stack Overflow
  i have installed ffmpeg on my local server and the phpinfo() function of php is showing that it has been enabled. When i am using Video Embed & Thumbnail Generator a wordpress plugin i ahve to specify the location where ffmpeg is installed i.e " Path to applications on server:" and when i enter the url it showing me that ffmpeg is not installed here. http://wordpress.org/extend/plugins/video-embed-thumbnail-generator/ Any help will be pretty much (...)
• 03:41
  On memcpy application crashes - FFMPEG, C++ - Spamdark Newest 'ffmpeg' Questions - Stack Overflow
  I have been working with ffmpeg, I got it working good, but I got a memory leak, I followed some instructions to fix it (like use av_frame_unref), so I needed to update ffmpeg to the version 1.2. This is weird for me, because everything was working good, and then, with the update, the application started to crash in a memcpy. Honestly, I don't know what's happening, I tried to google it but no answer. I would appreciate your help, here is the segment of the code which is failing: int WbMedia::DecodeAudioFrame(int16_t *audio_buf) static AVFrame *frame; static AVPacket pkt; static (...)

2 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 20:52
  Using FFmpeg programmatically with a proxy - William Seemann Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use FFmpeg with a proxy. The following code works if I comment out: setenv("http_proxy", "http://172.0.0.1:3128/", 1); The proxy server is an instance of Squid. I know the proxy server is working because I can use the same URL with VLC without any issues. With the proxy specified, the output from my code is always: Proxy path: http://172.0.0.1:3128/ Metadata could not be retrieved -5 // indicates an IO Error setDataSource failed, rc is: -1 I compiled FFmpeg with everything enabled. Can someone explain why this code doesn't work with a proxy? #include #include (...) -- Squid
• 10:09
  Which is most suitable ffmpeg build for centOS? [closed] - Wildan Muhlis Newest 'ffmpeg' Questions - Stack Overflow
  I didn't found ffmpeg build for CentOS from it's download site. Which is most suitable ffmpeg build for centOS? -- download site
• 19:41
  Python SWIG bindings with SomeType ** as function argument - vericule Newest 'ffmpeg' Questions - Stack Overflow
  I couldn't find any working Python bindings for ffmpeg, so I decided to generate one with SWIG. Generation was quick and easy (no customization, just default SWIG interface), but these a problem using some functions like int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options); from libavformat/avformat.h. Using C this can be run simply by: AVFormatContext *pFormatCtx = NULL; int status; status = avformat_open_input(&pFormatCtx, '/path/to/my/file.ext', NULL, NULL); In Python I try following: >>> from ppmpeg import * (...) -- libavformat/avformat.h
• 18:44
  Decode an RTP stream, process it, and encode it again - pinoscotto Newest 'ffmpeg' Questions - Stack Overflow
  i'm trying to receive an RTP stream (direct with an SDP file or from an RTSP server), decode it in something like an RGB matrix (to work on it with OPENCV), and encapsulate it again in a stream, to send it to another end point. I've tried live555, but it hasn't encoding/decoding, and support is mostly for keyframe formats. I've used ffmpeg whith success but only from the command line. I'm wondering if there's some smarter way of doing this. (...)
• 14:44
  What is the best Library/SDK for Realtime 4k video Encoding? - Abhishek Bansal Newest 'ffmpeg' Questions - Stack Overflow
  My requirement is create a encoded video from raw frames in atleast 4k resolution. Presently I am recording videos ⓐ1080p using libavcodec (H.264, MPEG4). What will be the best solution for recording these videos ⓐ4k? Is it possible to do multithreaded encoding using libavcodec? Another option could be using Intel QuickSync. How good is that? are there other any solutions available? Edit: I require atleast 24FPS.
• 11:46
  Android NDK & FFMPEG build - Android-Droid Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to build FFMPEG library for my android application using the NDK. I have downloaded the source code from it's website and I think I build it (it's my first try working with NDK and ffmpeg). I have created a build.sh file which I'm using to execute it from command line on Mac OS X. But I have a few questions... First things is as I know I need Android.mk file so I can use the builded library in my application,but I don't know how to do that for reasons which I told you above. After I run my build.sh I get android folder with a few folders and some libraries. (...)
• 09:16
  FFMPEG unable to take frame and save as image - alex Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to save an image from a video frame and save it as a jpeg. This function works for smaller video files, but if the video is over 10 minutes it won't save the jpeg image. An error comes up as before trans. public function VideoToJpeg($localVideoPath, $localOutImgPath) $Name = dirname(__FILE__) . "/ffmpeg"; $Str = "$Name -i \\"$localVideoPath\\" -an -ss 00:00:03 -an -r 1 -vframes 1 -y \\"$localOutImgPath\\""; exec($Str); Here is the error I got from ffmpeg [NULL ⓐ 0370e760] Unable to find a suitable output format for 'path' : Invalid (...)
• 11:06
  MP4 to all mobile compatible 3gp - Susheel Mishra Newest 'ffmpeg' Questions - Stack Overflow
  I am using FFMPEG for converting mp4 video to 3gp.I want to convert it to low end android phone as well as iphone.I am not concern with quality.Using it on linux server with php. I searched but my need is diferent , hence post question. thanks
• 01:26
  Convert raw PCM data to video? - user1801247 Newest 'ffmpeg' Questions - Stack Overflow
  I have file consisting of raw PCM data (no headers). I have been able to successfully play this file by opening it in Audacity (by importing the raw data). This file (as part of a game), apparently contains a video at the end of the file. I was hoping to be able to play this PCM data as a video without regard for headers as Audacity was able to do for audio. I took a look at ffmpeg to convert the .wav/.pcm to .mov, but there are no examples of going from audio -> video (an understandably rare scenario). Are there any tools out there to play my data as a video, without regard for (...)

1 May

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 20:26
  Losing Audio When Converting VOB to MPEG-2 using FFMPEG [closed] - Nathan Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFMPEG to convert VOB files to MPEG2 using ffmpeg -i file.vob -c copy out.mpg. It's converting the video fine, but the audio doesn't play on the resulting files. I get the [mpeg ⓐ 0x118afc0] max_analyze_duration 5000000 reached at 5005000 error, but setting -analyzeduration to 9999999 or higher doesn't get rid of the error. I think it's reading the stream correctly: Metadata: encoder : Lavf53.32.100 Stream #0:0: Video: mpeg2video, yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=2-31, 6124 kb/s, 29.97 fps, 90k tbn, 29.97 tbc Stream #0:1: Audio: ac3, 48000 Hz, stereo, (...)
• 20:36
  ffmpeg caps audio bitrate to 128kb/s [closed] - Andrew Burns Newest 'ffmpeg' Questions - Stack Overflow
  I want to upconvert a file to 256kb/s. (I understand I am losing quality and all that, I know that I really want to upconvert a 64kb/s=>256kb/s) The command I am using ffmpeg -i "Same Love.m4a" -acodec libfaac "Same Love.m4a" -b:a 256kb \\ -loglevel debug I have used every combination that I can think of and ffmpeg will only upconvert to 128kbs! Here is a log of my output $ ffmpeg -i "Same Love.m4a" -acodec libfaac "ready_to_import_to_itunes/Same Love.m4a" -b:a 256kb -loglevel debug ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers built on Oct 12 2012 12:31:30 with Apple (...)
• 23:33
  How do i create a batch file that iterates through the files in a folder and executes another .bat on them? - El Guapo Newest 'ffmpeg' Questions - Stack Overflow
  i have a folder full of .avi files and i want to use ffmpeg to convert them to .mp4 files. I followed an online tutorial to create a batch file that does just this, here is the code: "C:\\ffmpeg\\ffmpeg.exe" -y -i %1 -sameq -ar 22050 -vcodec libx264 "C:\\videos\\Series 1\\S01E01.mp4" This works fine if i just drag and drop the .avi files onto the createmp4.bat file containing the above code. However i want to be a little bit smarter about this and use another batch file that will iterate through the .avi files in the folder and run createmp4.bat on all of them and copy them to the (...)
• 23:38
  How to get rec script of SOX to work on Android? - Arif Nadeem Newest 'ffmpeg' Questions - Stack Overflow
  I built sox for Android and I am using the generated binary files i.e. sox, rec, play and soxi generated directly in my app by installing them as binaries within my app. I am able to invoke commands using sox directly however I have a problem in invoking rec command. I used the following command, rec -r 8000 -c 2 output.wav But it fails saying that sox is not found or sox is expected but is not found. The above rec command works perfectly in Ubuntu when I use it in command line Please note that I am able to use operation related to sox binary successfully, but I am unable to use (...) -- link
• 22:04
  Audio decoding using ffms2(ffmegsource) - praks411 Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffms2(ffmpegsource) a wrapper around libav to get video and audio frame from a file. Video decoding is working fine. However I'm facing some issues with audio decoding. FFMS2 provide a simple function FFMS_GetAudio(FFMS_AudioSource *A, void *Buf, int64_t Start, int64_t Count, FFMS_ErrorInfo *ErrorInfo); api to get the decoded buffer. The decoded data is return in buffer provided by user. For single channel the data is interpretation is straight forward with data byte starting from first location of user buffer. However when it comes to two channel there are two (...)
• 19:28
  Realtime removal of carriage return in shell - Seth Newest 'ffmpeg' Questions - Stack Overflow
  For context, I'm attempting to create a shell script that simplifies the realtime console output of ffmpeg, only displaying the current frame being encoded. My end goal is to use this information in some sort of progress indicator for batch processing. For those unfamiliar with ffmpeg's output, it outputs encoded video information to stdout and console information to stderr. Also, when it actually gets to displaying encode information, it uses carriage returns to keep the console screen from filling up. This makes it impossible to simply use grep and awk to capture the (...)
• 14:29
  Why do I get a crash only sometimes when closing input file with ffmpeg - Bradley Newest 'ffmpeg' Questions - Stack Overflow
  I have a problem where only sometimes when I call avformat_close_input(&pFormatCtx) and it results in malloc check failed and my application crashes. I really need to use ffmpeg because I need to grab a thumbnail of a video to show in a list and I cannot find an alternative library. Can anybody see something in my code where I am doing something wrong when using this library which may cause this malloc check failed problem? bool MuteCamera::PullFrame( ) pMJPEGCodec = avcodec_find_encoder(CODEC_ID_MJPEG ); bool bRet = false; int videoStream = -1; AVFrame *pFrame=NULL; AVFrame (...)
• 12:56
  FFMPEG Decoding - Memory Leak - Spamdark Newest 'ffmpeg' Questions - Stack Overflow
  Developing an application for a test, I encountered an error. Meanwhile the packets were proccessed, I got a very horrible problem, a memory leak. The av_free_packet is applied correctly, I think (See the code). When I run the app, the memory grows up to 500MB meanwhile it's playing the audio file, that's not normal. VLC or WMplayer (Windows Media Player) just wastes 30/20mb reading that file. Here is the code: static AVPacket pkt; static uint8_t *audio_pkt_data = NULL; static int audio_pkt_size = 0; static AVFrame frame; static bool first_time = true; if(first_time) (...)
• 01:58
  Using FFmpeg with Direct Show - rreeves Newest 'ffmpeg' Questions - Stack Overflow
  I have a problem using DirectShow for HD video streams from IP cameras. Direct Show does not seem to support HD video. I was thinking of using FFmpeg to grab the RTSP stream from the camera and pipe it to direct show. I'm wondering if this will produce HD video ? If not do you have any suggestions ? Thanks in Advance
• 04:23
  ffmpeg - continuous file streaming over RTMP - Sébastien Renauld Newest 'ffmpeg' Questions - Stack Overflow
  I've been looking around for a simple (or perhaps not-so-simple) walkaround for a problem I am having in my set up for a simple test case: video streaming over red5 media server. I have built a small-ish library of FLV files scraped from YouTube and managed to play them in succession with the following perl script: use Cwd; use strict; use warnings; use DBI; use DBD::mysql; our $db = DBI->connect(); my $dst = "/home/seb/youtube/"; sub streamFile my $r = $db->prepare("SELECT name FROM music_flvs ORDER BY RAND() LIMIT 1"); $r->execute(); my ⓐdata = $r->fetchrow_array(); my $filename = (...)

30 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 20:11
  Image pipe from php to ffmpeg - Angus Newest 'ffmpeg' Questions - Stack Overflow
  I'm tring to feed FFMpeg whith an image sequence through PHP in order to get a video out of it. I'm using this shell command to read from a text file the image filenames: cat $(cat " . $image-list-file . ") | ffmpeg -f image2pipe ... I would like to output to the pipe prom php, maybe after modifying the images through imagemagik or gd. How can I do this in PHP? Edit: SOLUTION Using a combination of proc_open and buffer did the job. Here's a working test script using some GD generated pictures. array("pipe", "r") ); $command = "ffmpeg -f image2pipe -pix_fmt rgb24 -r 30 -c:v (...)
• 20:04
  How to make audio sound batter? (C + FFMpeg audio generation example) - Spender Newest 'ffmpeg' Questions - Stack Overflow
  So I found this grate C FFMpeg official example which I simplefied: #include #include #include #ifdef HAVE_AV_CONFIG_H #undef HAVE_AV_CONFIG_H #endif #include "libavcodec/avcodec.h" #include "libavutil/mathematics.h" #define INBUF_SIZE 4096 #define AUDIO_INBUF_SIZE 20480 #define AUDIO_REFILL_THRESH 4096 /* * Audio encoding example */ static void audio_encode_example(const char *filename) AVCodec *codec; AVCodecContext *c= NULL; int frame_size, i, j, out_size, outbuf_size; FILE *f; short *samples; float t, tincr; uint8_t *outbuf; printf("Audio encoding\\n"); /* find the MP2 encoder */ (...) -- example
• 19:25
  How get sps struc from h264 video with libav ffmpeg - Oleksandr Kyrpa Newest 'ffmpeg' Questions - Stack Overflow
  For my HW decoder I need know additional codec specification about video codec like h264? How I can extract low level codec info with libav ffmpeg? The data that I need: http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/structSPS.html -- http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/structSPS.html
• 12:40
  Function definition(?) without - vericule Newest 'ffmpeg' Questions - Stack Overflow
  I was reading avio.h (part of ffmpeg) and there is definition(?) like this: int avio_printf(AVIOContext *s, const char *fmt, ...) av_printf_format(2, 3);. I don't get it. Could someone explain me what this do? Thanks.
• 13:47
  Change in MP4 duration from actual Video duration - Jayanth Nayak Newest 'ffmpeg' Questions - Stack Overflow
  I have muxed a 10s H.264 video with 10s aac audio using FFMPEG into a mp4 container. But the total duration showed by VLC Player is 14seconds, any idea why this might happen?
• 13:43
  h.264 video in mp4 container jumps when played in VLC - Jayanth Nayak Newest 'ffmpeg' Questions - Stack Overflow
  I have H.264 video and AAC audio generated in Andriod phone recieved wirelessly using SIP protocol and muxed using FFMPEG APIs, The generated mp4 when played through VLC or other player is never in Sync. when I see the time bar of Video, it skips after a certain duration. For example: in a video of 20s, the time bar seeks upto 14s properly, then it jumps to 18s and finishes at 20. The audio plays properly. I have following questions: Is PTS DTS calculations really required for muxing WITHOUT Encoding?: we used PTS = (90000 * (1/FPS) * FrameNumber) - although this did not work :( (...)
• 10:16
  Rebuilding opencv and ffmpeg with x264 results in java.lang.UnsatisfiedLinkError - kev Newest 'ffmpeg' Questions - Stack Overflow
  I've followed the readme file included with the cppjars zip file from javacv, I'm able to successfully build the libraries but when i run my app with the new .so files i get a java.lang.UnsatisfiedLinkError yet all the .so files exist in the armeabi folder. the line of code where this exception is triggered looks like this yuvIplimage = IplImage.create(imageWidth, imageHeight, IPL_DEPTH_8U, 2); and the exception is this 04-29 15:40:46.610: E/AndroidRuntime(23057): FATAL EXCEPTION: main 04-29 15:40:46.610: E/AndroidRuntime(23057): java.lang.ExceptionInInitializerError 04-29 (...)
• 08:15
  Skiping MP4 video - M.Yazdian Newest 'ffmpeg' Questions - Stack Overflow
  I like to create the video player to show videos on my website. I made a video player in flash CS5 and actionscript3 to stream the videos on the website. My videos are often flv or mp4 format. In the flv files I use flvmdi app to inject the metadata to that ,and for skipping the flv file I use xmoov-php (video player can pass the keyframe number from flv metadat to xmoov-php to create the new flv file from passed keyframe to the last flv keyframe, and return the flv video file on the php header for flash video player to show the video ). but about mp4 format in Xmoov-php wiki it says: (...)
• 07:51
  How to use libavformat to concat 2 video files with same codec (re-muxing)? - Tarhan Newest 'ffmpeg' Questions - Stack Overflow
  I have downloaded videos from CDN in flv format (video H264 and audio AAC) and remux to them to MP4 format. But videos are limited by length. So i've downloaded each video in several parts: started at start point, at point 1, at point 2 (by using seek parameter in url). Each point starts little earlier than ending of previous one. Using av_read_frame i scanned all parts and found that intersecting packets not only have same sizes and order but also their dts/pts shifted from each other by constant value. So to concat starting video with video started at point 1 I must do following: 1. (...)
• 09:11
  How to dump raw RTSP stream to file? - nissemand Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to dump a raw RTSP stream to file and then later decode the file to something playable? Currently I'm using FFmpeg to receive and decode the stream, saving it to an mp4 file. This works perfectly, but is CPU intensive, and will severely limit the number of RTSP streams I can receive simultaneously on my server. I would like to save the stream to file without decoding it, and delay the decoding part to when the file needs to be opened. Is this possible? I have tried VLC, which is even more CPU intensive than FFmpeg. I've also looked at this question where the (...)
• 05:49
  Xuggler not converting a .webm file? - Click Upvote Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying simply to convert a .mov file into .webm using Xuggler, which should work as FFMPEG supports .webm files. This is my code: IMediaReader reader = ToolFactory.makeReader("/home/user/vids/2.mov"); reader.addListener(ToolFactory.makeWriter("/home/user/vids/2.webm", reader)); while (reader.readPacket() == null); System.out.println( "Finished" ); On running this, I get this error: [main] ERROR org.ffmpeg - [libvorbis ⓐ 0x8d7fafe0] Specified sample_fmt is not supported. [main] WARN com.xuggle.xuggler - Error: could not open codec (...)
• 04:58
  How to install sharedhostffmpeg on a host running redhat linux while not being root? - user2251342 Newest 'ffmpeg' Questions - Stack Overflow
  The shared host is running on Red Hat 4.4.7-3. All these packages have successfully installed: - presetup.sh, autoconf.sh, automake.sh, libtool.sh, libiconv.sh, libpng.sh, libjpeg.sh, zlib.sh, libwmf.sh, freetype.sh, gettext.sh, gd.sh, ruby.sh, flvtool2.sh, lame.sh, codecs.sh, libogg.sh, libvorbis.sh, vorbis-tools.sh, libtheora.sh, amrnb.sh, amrwb.sh, liba52.sh, facc.sh, faad2.sh. That's exactly all the files just before ffmpeg itself! I know the error has to do with a library. However, I'm not familiar with libraries. The error message says: /usr/bin/ld: (...)
• 06:29
  what's the commond for converting mp3 to ape using ffmpeg - user2331687 Newest 'ffmpeg' Questions - Stack Overflow
  I've searched a day about how to convert the mp3 music file to APE. It's easy to convert APE to mp3 but I have no idea to convert mp3 to APE, thanks in advance;
• 06:20
  C - Transcoding to UDP using FFmpeg? - golmschenk Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use the FFmpeg libraries to take an existing video file and stream it over a UDP connection. Specifically, I've been looking at the muxing.c and demuxing.c example files in the source code doc/example directory of FFmpeg. The demuxing file presents code which allows an input video to be converted into the video and audio streams. The muxing file presents code which creates fake data and can already be output to a UDP connection as I would like. I've begun work combining the two. Below can be found my code which is basically a copy of the muxing file with some (...)

29 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 09:29
  ffmpeg, built for android unable to read input with spaces [closed] - Jijo Varghese Newest 'ffmpeg' Questions - Stack Overflow
  I have been working on an android multimedia application, where i'm using ff-mpeg 0.11.1 (code name: Love). Ff-mpeg 0.11.1 has been built according to the guardian project. This project is working very much fine as a compressor/converter unless i'm inputting a video path name without space in it. Any idea what could be the reason behind this malfunctioning ? Thanks in advance.
• 21:40
  How to queue ffmpeg FIFO - Francois Newest 'ffmpeg' Questions - Stack Overflow
  we build a service similar to youtube. Also converting runs fine with ffmpeg using this script from another post here: How do I set up an ffmpeg queue? #!/bin/bash pipe=/tmp/ffmpeg trap "rm -f $pipe" EXIT # creating the FIFO || mkfifo $pipe while true; do # can't just use "while read line" if we # want this script to continue running. read line This works pretty good when i send one by one to the named pipe. When i send more than one at same time the second one queues the terminal to the point the first one finished. if a try more than 2 the third one will not be transcoded. So i (...)
• 19:36
  using node-fluent-ffmpeg to transcode with ffmpeg on windows not working - Vprnl Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use the module node-fluent-ffmpeg (https://github.com/schaermu/node-fluent-ffmpeg) to transcode and stream a videofile. Since I'm on a Windows machine, I first downloaded FFMpeg from the official site (http://ffmpeg.zeranoe.com/builds/). Then I extracted the files in the folder C:/FFmpeg and added the path to the system path (to the bin folder to be precise). I checked if FFmpeg worked by typing in the command prompt: ffmpeg -version. And it gave a successful response. After that I went ahead and copied/altered the following code from the module (...) -- https://github.com/schaermu/node-fluent-ffmpeg, http://ffmpeg.zeranoe.com/builds/, https://github.com/schaermu/node-fluent-ffmpeg/blob/master/examples/express-stream.js
• 20:40
  iOS - Build/configure FFmpeg failing, "unable to create an executable file"? - golmschenk Newest 'ffmpeg' Questions - Stack Overflow
  I'm attempting to build FFmpeg for iOS. I've tried following several tutorials on doing this (for example, tutorial 1, tutorial 2), all of which result in the same problem: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc is unable to create an executable file. C compiler test failed. The configuration setup I'm attempting to use is the following: ./configure \\ --prefix=armv7 \\ --disable-ffmpeg \\ --disable-ffplay \\ --disable-ffprobe \\ --disable-ffserver \\ --enable-avresample \\ --enable-cross-compile \\ (...) -- tutorial 1
• 17:30
  ffmpeg being called via PHP exec batch file - calmchess Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg to extract images from a video file through PHP shell_exec method. This is all ok except if the image already exsists then ffmpeg won't overwrite it even with the -y option in the ffmpeg command. I think it has something to do with shell_exec though because if I execute the bat by clicking on it then all is well with the batch file. Anybody ever had this problem? Any imput would be greatly apprciated. maybe I should just use a del statment to delete the image if it exsits before ffmpeg has a chance to run. Input please. (...)
• 15:39
  ffmpeg video-concatenation - audio-/videotrack Synchronisation - user1739223 Newest 'ffmpeg' Questions - Stack Overflow
  I'm want to concatenate different video-files of random format. First I convert them to flv, adapt the framerate of each video to lowest of the involved videos. Next step is to decode them and remove the header (but not the header of the first video in the sequence, then I concatenate them with cat and finally I encode the resultsequence. But the video- and audio-track are going more and more out of sync from sequence-part to sequence-part. Would be glad for any (...)
• 13:05
  FFMPEG - build ubuntu 32 bit - missing shared library : libspeex - Benoit Brayer Newest 'ffmpeg' Questions - Stack Overflow
  I am currently doing a cross platform software calling ffmpeg in c++ and I need a ffmpeg build working on both ubuntu 32bits and 64bits for the installer. I also need this ffmpeg build to include librtmp, libh264, x11-grab, alsa, and mp3. I tried to compile ffmpeg on a 32bits virtual box to have a ffmpeg build working on ubuntu 32 bits and 62 bits. I used this guide to build ffmpeg : https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide After compiling all the libs and ffmpeg himself, after installation using the deb files, ffmpeg is working perfectly on the 32bits virtualbox with (...) -- https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide, http://ffmpeg.gusari.org/static/
• 12:33
  ffmpeg extension isn't installing - kaan yilgin Newest 'ffmpeg' Questions - Stack Overflow
  I'm using wamp server v2.2 x64 and php version 5.3.13. I'm trying to install ffmpeg during two days. I fallowed this steps: Download dll files for x64 (I'm using windows7 x64) copied ffmpeg.dll to bin\\php\\php5.3.13\\ext copied rest of dll files to system32 enable ffmpeg extension from wamp server. and I checked phpinfo() but it's not working. by the way is there any way to take a frame from video for poster image ?
• 11:08
  ffmpeg (linux) - issue recording webcam and screen simultaneously - Black27 Newest 'ffmpeg' Questions - Stack Overflow
  I've found on the web this script (from user jmhobbs, if reading I'd like to thank, on github), and it works perfectly except for the lenght of the saved files. In fact the video player (vlc, or others) will show a lenght bigger than the real one, and I can't change the point at which the video is playing, unless it will reset to the begin. Here's the script #! /bin/bash unlink screen.mpg unlink camera.mpg echo "Starting Desktop Grab" ffmpeg -f x11grab -s `xdpyinfo | grep 'dimensions:'|awk 'print $2'` -r 25 -i :0.0 -sameq screen.mpg > /dev/null 2>&1 (...)
• 04:43
  How to append 2 video files [migrated] - Maxime Newest 'ffmpeg' Questions - Stack Overflow
  Is there any way to append one video file to another ? I've got a very large file (2GB) to which I'm trying to append some tiny files (~4MB). They all are in the same format. It's easy to concat several files with ffmpeg for instance, but the whole file is written everytime (i.e. 2GB+4MB are written to the disk everytime when only 4MB are added to the inital file). I'm trying to avoid all this extra disk IO by using a command that would only append the 4MB files. Any idea how to do (...)
• 01:46
  ffmpeg/PHP - Problems converting any video format to ogg - Choppy Video / No Audio - win64 - IIIOXIII Newest 'ffmpeg' Questions - Stack Overflow
  Let me first appologize if this is a re-post/similar-post as I did my best to search for a specific solution to my issue within the already created posts on here, and on google, but could not. I am using ffmpeg on localhost on win64 system to create/test video conversion scripts prior to uploading them to the server. I am able to successfully convert to/from mp4/flv/wmv/mov without issue, however, whenever I try to convert to .ogg from any other format, I run into issues. First I tried this: exec($ffmpegPath." -i ".$srcFile." ".$destFile); but ended up with a corrupt file without (...)

28 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:41
  making screenshots from a wmv video with ffmpeg in linux [closed] - John Newest 'ffmpeg' Questions - Stack Overflow
  when I try to make screenshots from a wmv video it shows- Error while decoding stream #0.1 - frame= 0 fps= 0 q=0.0 Lsize= -0kB time=10000000000.00 bitrate= -0.0kbits/s video:0kB audio:0kB global headers:0kB muxing overhead -inf% the command I am using for taking the video screenshots is - ffmpeg -i name.wmv -r 1/20 %03d.jpg I am using ffmpeg in linux, the video in question was originally encoded with Windows Media Video 9 and I can screenshot the video fine in windows but I cannot get it to work in linux. mediainfo shows the following - Video Format: VC-1 - Codec: WVC1, Microsoft (...)
• 23:52
  How do I set up an ffmpeg queue? - Travis McCrea Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to encode many videos on my server, but FFMPEG is resource intensive so I would like to setup some form of queueing. The rest of my site is using PHP, but I don't know if I should use PHP, Python, BASH, etc. I was thinking I might need to use CRON but I am not really sure exactly how to tell ffmpeg to start a new task (from the list) after it finishes the one before it.
• 13:27
  ffmpeg fails to convert an uploaded video file whose size greater than 14mb when executed through c#.net - Harun Newest 'ffmpeg' Questions - Stack Overflow
  I am converting videos to flv using ffmpeg.exe through c# and the process gets stuck and the conversion fails if the file size exceeds 14mb. I've tried to run ffmpeg directly through command prompt and it works fine regardless of size. My conversion code is as follows: OutputFile = SavePath + "SWF\\\\" + WithOutExt + ".flv"; FilArgs = string.Format("-i 0 -ar 22050 -qscale 1 1",InputFile,OutputFile); Process proc; proc = new Process(); try proc.StartInfo.FileName = spath + "\\\\ffmpeg\\\\ffmpeg.exe"; proc.StartInfo.Arguments = FilArgs; proc.StartInfo.UseShellExecute = false; (...)
• 13:36
  Running ffmpeg.exe through windows service fails to complete while dealing with large files - Harun Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg.exe to convert video files to flv format. For that purpose i use a windows service to run the conversion process in background. While trying to convert large files(i experienced it when the file size is >14MB) through windows service it gets stuck at the line which starts the process(ie, process.start();). But when i tried to execute ffmpeg.exe directly from command prompt it worked with out any problems. My code in windows service is as follows: private Thread WorkerThread; protected override void OnStart(string[] args) WorkerThread = new Thread(new (...)

27 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:44
  Converting series of images with ffmpeg results in black video [migrated] - Marco Gagliardi Newest 'ffmpeg' Questions - Stack Overflow
  I've just downloaded ffmpeg since it seems to perfectly match my needs (make a video from a set of pictures). I'm currently playing around with some examples just to get started and there's something weird happening that I can't explain. I'm trying this command (provided in the official documentation): ffmpeg -f image2 -pattern_type glob -i 'foo-*.jpeg' -r 12 -s WxH foo.avi on a data set of 10 jpg pictures (of course I changed the pattern with '*.jpg'). The video seems to be encoded correctly but it's simply too fast to be sure about that (anyway (...)
• 19:28
  Why does FFMPEG report the wrong duration? - Adrian Lynch Newest 'ffmpeg' Questions - Stack Overflow
  I have an oldish build of FFMPEG that I can't easily change. We use FFMPEG to find the duration of video and sound files. So far it has been working wonderfully. Recently on an uploaded file, FFMPEG has reported a 30 second file as being 5 minutes 30 seconds in length. Could it be something wrong with the file rather than FFMPEG? If I use FFMPEG to convert to another file, the duration is restored. In case it matters, ffmpeg -i 'path to the file' produces: FFmpeg version Sherpya-r15618, Copyright (c) 2000-2008 Fabrice Bellard, et al. libavutil 49.11. 0 / 49.11. 0 (...)
• 20:59
  ffmpeg empty video with low frame rate - Marco Gagliardi Newest 'ffmpeg' Questions - Stack Overflow
  I've just downloaded ffmpeg since it seems to perfectly match my needs (make a video from a set of pictures). I'm currently playing around with some examples just to get started and there's something weird happening that I can't explain. I'm trying this command (provided in the official documentation): ffmpeg -f image2 -pattern_type glob -i 'foo-*.jpeg' -r 12 -s WxH foo.avi on a data set of 10 jpg pictures (of course I changed the pattern with '*.jpg'). The video seems to be encoded correctly but it's simply too fast to be sure about that (anyway (...)
• 06:35
  Media container for H264 and Opus - Ricky Newest 'ffmpeg' Questions - Stack Overflow
  I am looking for a media container that can hold H264 video and Opus audio, allowing me to perform playback using VLC or equivalent. H264 is a hard requirement, and I picked Opus because of the licensing benefits. Wikipedia suggests that .ogg is what I'm looking for. However, when I looked at the VLC and FFMPEG source code, neither included H264 support in their ogg demuxer (VLC source suggests that it only support Theora, Vorbis, and CMML, FFMPEG had something similar). Is there another container I can use? Alternatively, I can also alternative audio encoder such as aac. But all (...) -- Wikipedia suggests

26 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:59
  PHP, take snapshot from video(without using FFMPEG) [closed] - Moussawi7 Newest 'ffmpeg' Questions - Stack Overflow
  Please. Anybody have an idea about how to take a snapshot from a video using PHP,(Need it without using FFMPEG)!!!??. Thanks anyway
• 20:29
  How to encode MKV with subtitles to MP4? [closed] - Aco Strkalj Newest 'ffmpeg' Questions - Stack Overflow
  MKV file. ASS subtitle format. Trying to use ffmpeg to encode it to a streamable MP4 and WebM and OGV. But I find it difficult to carry over the subs. Can anyone help me with this?
• 23:31
  How to run FFMPEG at my web host server - user1978421 Newest 'ffmpeg' Questions - Stack Overflow
  I want to perform some video process at my web host server. I don't think the web host server will allow me to execute an exe file for security reasons. Should I use SharpFFMpeg? I have downloaded SharpFFMpeg. But it's lacking a proper documentation. Can someone give one example how to perform a conversion from one video format to another? I have written my execution program, but the compiler says it cannot file the file specified. What's wrong with it? string command = ⓐ"D:\\Recorded TV\\ffmpeg.exe -i ""Australia's Toughest Police_QUEST_2013_04_17_21_57_00.wtv"" -s (...)
• 19:20
  FFMPEG best practice? - HighFlyingFantasy Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to write a wrapper class for FFMPEG. I have 4 classes within the wrapper, Stream, Demux, Encode, Decode. All of these classes use avcodec, avformat, etc. My question is, can I use the avcodec_register_all, av_register_all and avformat_network_init in my top level wrapper after initializing the lower level classes, or should I call each one individually in the lower level init methods?
• 20:15
  How to redirect the output of an invoked program to a file? - Jim Miller Newest 'ffmpeg' Questions - Stack Overflow
  I've got some PHP code that, among other things, uses system() to call ffmpeg to encode a video. When I run this from a command line, I can redirect the output of the PHP script to a file in the usual way -- php mycode.php > mycode.log -- and I get not only whatever print statements I call in PHP, but also the stuff produced by ffmpeg, which I want. All's well. Now, however, I want to launch the PHP script in the background via a web page: I do some stuff on my site that causes this to run: $the_command = "/bin/php $php_file_name > $log_file_name &"; $the_result = (...)
• 15:54
  C - FFmpeg streaming from a C program? - golmschenk Newest 'ffmpeg' Questions - Stack Overflow
  I'm looking to replicate an FFmpeg command-line command in my C code. Specifically I would like to be able to run: ffmpeg -re -i video.mp4 -f mpegts udp://localhost:7777 One thing I've noticed when looking at people's code who have used the libraries of FFmpeg in their own code is that they often have a few hundred lines of code for a single command similar to an FFmpeg command-line command. I'm guessing this is just because they are doing something very specific, because if I can run that short command on my command line and get what I want it should probably only take (...)
• 17:21
  Instructions to render native audio-video streaming without using SDL? - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  I am develloping my own android media player ,so i opted for ffmpeg for decoding, i've successfully decoded and rendered video but there is no sound now i don't know how to add audio decoding audio to my video decoding and even how to decode a simple audio file and then render it in android using jni.what instruction i have to use (Avframe openinput and then what) Thanks in advance
• 13:03
  how reset PTS while converting with FFMPEG - Qianliang Zhang Newest 'ffmpeg' Questions - Stack Overflow
  While converting *.ts file with ffmpeg, I want to set the start pts to be 10, or other pts. How can I do that? some people said setpts can help. I tried, but failed. Maybe my command is not correct, so what is the correct way? Any help would be appreciate! Thank you! -- setpts
• 11:58
  FFmpeg Runtime Error. Input/Output Error Returned - manutd Newest 'ffmpeg' Questions - Stack Overflow
  I got error during tcp opening. Exactly to say, avformat_open_input always return -5 (input/output error). I looked into the source of the error code using gdb and found that getaddrinfo(in libavformat/tcp.c) function didn't work well as expected and returned the error value EIO. My ffmpeg source have ff_getaddrinfo(in libavformat/os_support.c) function that is linked to getaddrinfo(which function is a pointer function) but when I run the program, my program called other function in libc.so(not getaddrinfo), dynamic library. I couldn't find which function is called. I gave the (...)
• 11:50
  FFMPEG mosaic/side-by-side-compositing from simultaneous DirectShow input devices - timlukins Newest 'ffmpeg' Questions - Stack Overflow
  This is what I'm trying to do: ffmpeg.exe -y \\ -f dshow -i video="Microsoft LifeCam Cinema" \\ -f dshow -i video="Microsoft LifeCam VX-2000" \\ -filter_complex "[0:v]pad=iw*2:ih:0[left];[left][1:v]overlay=W/2.0[fileout]" \\ -map "[fileout]" -vcodec libx264 -f flv out.flv Basically, I have 2 webcams and I would like to combine them into a single video file in which the frames are 2x1 in size with the frame from one camera in the left and the other on the right. In other words, what might be termed "mosaic-ing" or "side-by-side compositing". This is not concatenation - i.e. one file (...) -- here
• 13:38
  How to scale and position watermark to scale? - Cobra_Fast Newest 'ffmpeg' Questions - Stack Overflow
  I'm scaling a video and applying a watermark like so: ffmpeg -ss 0:0:0.000 -i video.mp4 -y -an -t 0:0:10.000 -vf \\"[in]scale=400:316[middle]\\" -b:v 2000k -r 20 -vf 'movie=watermark.png,pad=400:316:0:0:0x00000000 [watermark];[middle] [watermark]overlay=0:0[out]' out.flv However, the applied watermark seems to be scaled to the original video size rather than the smaller scaled video size. This command line worked on ffmpeg version 0.8.6.git and now behaves differently after an upgrade to version N-52381-g2288c77. How do I get it to work again? Update 2013-04-26: I now have (...)
• 11:32
  Ffmpeg-Build: Error during build - talhamalik22 Newest 'ffmpeg' Questions - Stack Overflow
  I am building ffmpeg and stuck in an unusual spot. Inside libavutil we have float_dsp.h and float_dsp.c files. Inside these file there is a declaration of a methond which is: void (*butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len); float (*scalarproduct_float)(const float *v1, const float *v2, int len); when building and compiling this file i get this error and have no idea what to do. I think problem is somewhere else but again have no idea at all. Error is jni/ffmpeg/libavcodec/../libavutil/float_dsp.h:150: error: expected ';', ',' or (...)
• 10:49
  Build FFMPEG 1.2 (Code name magic) for android - Jijo Varghese Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a multimedia project. Where i need to concatenate more than one videos. I found that ffmpeg concat demuxer has been added to ffmpeg fire flower (version 1.1). Somebody help me out on, how to builid ffmpeg 1.1 / 1.2 for android?. I've checked all other alternatives, None succeeded. Thanks in advance !!
• 05:31
  ffmpeg drawtext initialization error - Dhruv Govil Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert an image sequence to a video file with some text overlay(eventually frame counter). The command I am using ffmpeg -r 24 -y -i mambo_%05d.png -i ..\\3DW_Mambo.wav \\ -vf drawtext="fontfile=/Windows/Fonts/arial.ttf:text='test' " test.mp4 Unfortunately everytime I try running it, it can't seem to find the font. I've seen other people succesfully use the same syntax, so not sure what I might be doing different? I've checked that the font is named (...)
• 03:26
  using ffmpeg as multiple downloads - user2321982 Newest 'ffmpeg' Questions - Stack Overflow
  well guys, I'm having problems with my application. well I'll explain more, I'm using the plugin uploader uploads multiple videos and I'm using the ffmpeg extension to my php version. // Convert divs to queue widgets when the DOM is ready $(function() $("#uploader").pluploadQueue( // General settings runtimes : 'gears,flash,silverlight,browserplus,html5', url : 'upload.php?id=&name=', flash_swf_url : 'plugins/plupload/plupload.flash.swf', containers: 'plupload', multipart: true, urlstream_upload: true, (...)
• 02:31
  libav/ffmpeg: avcodec_decode_video2() returns -1 when separating demultiplexing and decoding - unbekannt Newest 'ffmpeg' Questions - Stack Overflow
  I'm using libav (from a C++ program on Linux and Windows) to decode video streams from a file, which works fine (decoding various formats like H264 and MPEG2) using avformat_open_input(), av_read_frame() and avcodec_decode_video2(). Now I have to separate demultiplexing and decoding. One class will call avformat_open_input() and av_read_frame() and then pass the AVPackets into a queue that is read by another class. There I use avcodec_alloc_context3() to get the AVCodecContext needed for avcodec_decode_video2(). I've tested that with a MPEG2 video stream and it works. Problems (...)

25 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 19:25
  Concatenate mp4 files in Android using halfninja ffmpeg - Budius Newest 'ffmpeg' Questions - Stack Overflow
  I've manage to compile halfninja ffmpeg scripts for Android NDK using NDK version r5c. (Unfortunately any attempt to compile with earlier NDK generated some error), also I'm not very knowledgeable on the whole NDK process, so it's a bit hit-n-miss for me. His scripts are compiling ffmpeg version N-30996-gf925b24 (the specific commit he did the scripts for) Moving forward to my actual app. I manage to trim videos without problems, now I need to join/concatenate them but any attemp at using any and several combinations of the commands found on those 3 links (link1, link2, (...)
• 23:13
  Video decoder on Cuda ffmpeg - Oleksandr Kyrpa Newest 'ffmpeg' Questions - Stack Overflow
  I starting to implement custum video decoder that utilize cuda HW decoder to generate YUV frame for next to encode it. How can I fill "CUVIDPICPARAMS" struc ??? Is it possible? My algorithm are: For get video stream packet I'm use ffmpeg-dev libs avcodec, avformat... My steps: 1) Open input file: avformat_open_input(&ff_formatContext,in_filename,nullptr,nullptr); 2) Get video stream property's: avformat_find_stream_info(ff_formatContext,nullptr); 3) Get video stream: ff_video_stream=ff_formatContext->streams[i]; 4) Get CUDA device and init it: (...)
• 22:17
  Missing functions in new version of FFmpeg - Asik Newest 'ffmpeg' Questions - Stack Overflow
  I am upgrading a wrapper around ffmpeg to the most recent version of the library. Some functions have been renamed or replaced. For the most part I've been able to found equivalents easily, but the following two are giving me trouble: av_abort_set_callback av_abort_default_callback I could not find these functions by searching online, so what happened to them and what should they be replaced with now? Here is a copy of the header file "abort.h" where they were located: /* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the (...)
• 18:14
  Error FFmpeg in Android - Mark Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FrameGrabber to load a video from sdcard and perform some image processing operation. I followed the tutorial at JavaCV site to load javacc and ffmpeg. Currently, to run the application, I'm using my tablet (Asus TF 101G with Android version 4.0.3) connected to my pc and it works fine. But if I try to run the same application in another device (e.g. Nexus with Android 4.1.2) I get these errors: 02-01 16:51:54.687: E/AndroidRuntime(2839): FATAL EXCEPTION: main 02-01 16:51:54.687: E/AndroidRuntime(2839): java.lang.ExceptionInInitializerError 02-01 16:51:54.687: (...) -- JavaCV site
• 17:44
  How to use ffmpeg's sws_scale from multiple threads? - Asik Newest 'ffmpeg' Questions - Stack Overflow
  I have a color space conversion function based on sws_scale. It will be called from multiple different threads during the lifetime of the application. I don't know, however, how thread-safe sws_scale is and I did not find it mentionned in its documentation. I would assume that each thread requires its own SwsContext as this parameter will be shared, but is this enough to guarantee there won't be any internal collisions? -- sws_scale, SwsContext
• 17:54
  Mathematically lossless encoding and decoding of RGB24 image sequence - curryage Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to encode a RGB24 image sequence into a mathematically (not merely visually) lossless video. huffyuv was suggested on many online forums so I tried the following. ffmpeg -i frames\\%06d.png -vcodec huffyuv test.avi The resulting video was then decoded into frames again using ffmpeg ffmpeg -i test.avi outframes\\%06d.png However, the input and output frames are not bit-by-bit identical as promised by huffyuv here. Any idea how I can accomplish this? My eventual goal is to read the video file using OpenCV but I am willing to cross that bridge later once I obtain a losslessly (...) -- here, OpenCV
• 12:12
  php-ffmpeg too slow - generating thumbnails? - Wiggler Jtag Newest 'ffmpeg' Questions - Stack Overflow
  first time I am trying to create thumbnail preview from video file, uploaded 700mb .avi film with 209747 frames. Now I am trying to create 1 thumbnail, but it takes 4.7 seconds, because I've set frame 10000, if I set it just to 1000, it takes only 0.4 seconds to generate thumbnail. How could I generate like 5-10 thumbnails from different frames on-the-go in less than a second? Is it even possible? Is it different to use exec(ffmpeg) or php-ffmpeg? Using 0.6-svn ffmpeg, Debian 6.0.7, php 5.4.14 on machine 2x Xeon L5420 and still slow... Any ideas? How about to use ffmpeg + time of the (...)
• 13:36
  Decode video with CUDA nccuvid and ffmpeg [closed] - Oleksandr Kyrpa Newest 'ffmpeg' Questions - Stack Overflow
  *strong text*I starting to implement custum video decoder that utilize cuda HW decoder to generate YUV frame for next to encode it. How can I fill "CUVIDPICPARAMS" struc ??? Is it possible? My algorithm are: For get video stream packet I'm use ffmpeg-dev libs avcodec, avformat... My steps: 1) Open input file: avformat_open_input(&ff_formatContext,in_filename,nullptr,nullptr); 2) Get video stream property's: avformat_find_stream_info(ff_formatContext,nullptr); 3) Get video stream: ff_video_stream=ff_formatContext->streams[i]; 4) Get CUDA device and init it: (...)
• 13:36
  Difference between stream level and file level in ffmpeg - Usama Newest 'ffmpeg' Questions - Stack Overflow
  Concatenation of files with same codecs with ffmpeg Two methods Concat demuxer Concat protocol While the demuxer works at the stream level, the concat protocol works at the file level. Certain files (mpg and mpeg transport streams, possibly others) can be concatenated. This is analogous to using cat on UNIX-like systems or copy on Windows. In general, the demuxer is the better option What is the difference between stream level and file level? Thanks in (...)
• 09:44
  AndroidBitmap_lockPixels always failing - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  In my jni module I copy images to bitmaps, which were previously passed from my java application. I do this using AndroidBitmap_lockPixels/AndroidBitmap_unlockPixels. Basically, it renders the image correctly, but there're strange effects: sometimes the application gets stuck, or after some time AndroidBitmap_lockPixels always returns -3 (ANDROID_BITMAP_RESULT_ALLOCATION_FAILED). I guess this is because I update these bitmaps not from the GUI thread, isn't it? If so, what would be correct way to "post" this operation to the GUI thread? Is it possible in jni ? (...)
• 07:32
  how To configure ffmpeg for the iPhone 4s and iphone5 - pengwang Newest 'ffmpeg' Questions - Stack Overflow
  i want to configure ffmpeg,i have read https://github.com/yuvi/gas-preprocessor ,but this link only configure ffmpeg for the iPhone 3gs and iPod touch 3g using armv7 and iPhoneOS3.0.sdk, i want to configure ffmpeg for the iPhone 4s and iphone5 using armv7s and iPhone5.0sdk. can you give some advice and some link to finish it? -- https://github.com/yuvi/gas-preprocessor
• 07:03
  FFMPEG streaming RTP: time base not set - Managarm Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a small demo to get a feeling for streaming programmatically with ffmpeg. I'm using the code from this question as a basis. I can compile my code, but when I try to run it I always get this error: [rtp ⓐ 0xbeb480] time base not set The thing is, I have set the time base parameters. I even tried setting them for the stream (and the codec associated with the stream) as well, even though this should not be necessary as far as I understand it. This is the relevant section in my code: AVCodec* codec = avcodec_find_encoder(AV_CODEC_ID_H264); AVCodecContext* c = (...)
• 00:47
  ffmpeg loop not found error - cantsay Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use image.gif as a still for the entire duration of audio.mp3, and make a video from it. here is the current command I am using ffmpeg -i audio.mp3 -loop 1 -i image.gif -acodec copy video.avi this works, but goes on for ages constantly increasing audio file, which makes me believe it's looping the mp3 file or something. I tried changing the audio/image around, but it doesn't work and says: Option loop not found. I tried -shortest too, which I thought matched the length to the audio, but it makes the file twice the size of the MP3 + the size of the image (...)
• 01:02
  FFmpeg - PHP Error Code 127 - Kit Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to execute FFmpeg from php. I have installed FFmpeg-php, and the extension is in the modules directory and it shows up in phpinfo. FFmpeg is working fine as I can run the command in a terminal and it outputs the video. However, when I try and run the command from php using the following script: exec(ffmpeg -i input.avi output.avi); But I get a '127' error code. The extension is loaded in using: $extension = "ffmpeg"; $extension_soname = $extension . "." . PHP_SHLIB_SUFFIX; $extension_fullname = PHP_EXTENSION_DIR . "/" . $extension_soname; // Locate Extension (...)

24 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 18:07
  Concatenate multiple WAV files using single command, without extra file [migrated] - Manu Newest 'ffmpeg' Questions - Stack Overflow
  I want to concatenate multiple WAV files into a single WAV file using FFMPEG. I have used the following command and it generates the required file. Command: ffmpeg -f concat -i mylist.txt -c copy output.wav File : #mylist.txt file '1.wav' file '2.wav' file '3.wav' file '4.wav' But as you can see the problem is that I have to create a text file to specify the list of WAV files to concatenate. I can do all these tasks, but I would prefer a single command something that looks like ffmpeg -i 1.wav -i 2.wav -i 3.wav -i 4.wav output.wav or ffmpeg -i (...)
• 18:01
  How to get real video duration in php with ffmpeg [closed] - user82098 Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg -i *filename* tries to get info from video headers, but *filename* can be corrupted and then headers data will be incorrect for example ffmpeg -i *filename* can return me smth like "Duration: 00:20:21.09" but after converting *filename* I get video w duration 00:05:13
• 17:49
  Download Video from m3u8 with ffmpeg and multibitrate - AbrahamSustaita Newest 'ffmpeg' Questions - Stack Overflow
  I need to download the videos from a streaming site (Akamai) once they are recorded. I can do it with ffmpeg without troubles, but only if the manifest file has only one video stream. If it has multibitrate then I got into problems. Is there anyway I can tell ffmpeg to download one or other video? This is the line I'm using: ffmpeg -i http://akamai.link.com/master.m3u8 -acodec copy -vcodec copy -y -loglevel info -f mp4 destiny.mp4 EDIT: Adding response: This is the file I'm using: #EXTM3U #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=714000,RESOLUTION=640x480,CODECS="avc1.77.30, (...)
• 18:45
  What are open source ffmpeg players for iOS/Android? - jAckOdE Newest 'ffmpeg' Questions - Stack Overflow
  I have been searching for open source ffmpeg player, and I found somes. But I think there is a lot more out there. If you know one, please drop a line in the comment or answer. I'm working on iOS but really want to look further to see what has been made for Android Here are what i found: Mooncatventures group https://github.com/mooncatventures-group KxMoviePlayer (use OpenGLES, Core Audio) https://github.com/kolyvan/kxmovie FFmpeg for ios (with OpenGLES, AudioQueue) https://github.com/flyhawk007/FFmpeg-for-iOS.git iFrameExtractor (...) -- https://github.com/mooncatventures-group, https://github.com/kolyvan/kxmovie, https://github.com/flyhawk007/FFmpeg-for-iOS.git, https://github.com/lajos/iFrameExtractor.git
• 18:13
  how to get multiple video streams onto one cycling stream - user2316437 Newest 'ffmpeg' Questions - Stack Overflow
  I need to get streams from several network cameras (h.264, mpeg-4 and mjpeg) and make them into a single cycling stream. Say, 5 seconds for each camera. The problem is that I have very limited bandwidth for showing the video (64kbits/s) and that's the only way of doing it. I think the best way yould be to get screenshots from every camera, say 1 screenshot per second for camera 1 for 5 seconds, then 1 screenshot per second for camera 2 ... and make them into a video stream of 1fps. I preferred the screenshot method because I think the other codecs will take more than 5 secs to show up (...)
• 15:25
  iPhone - FFMPEG/VLC audio stream for iOS - Siriss Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to write an app for a school project that will play a video stream of the lab. They use Foscam cameras, and from what I understand they only stream audio in FFMPEG and VLC (a wrapper of FFMPEG and others, correct?). I can play the video stream in a UIWebView just fine, but I can't figure out how to get audio to work. I have read a bunch of post on here about the different audio stream options, but none support this format. I have also looked into VLCKit, but that seems to only work in OS X, not iOS. Is there a Framework, or Kit that can stream audio from a VLC/FFMPEG (...)
• 16:41
  AndroidBitmap_lockPixels failing with -3 code - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  In my jni module I copy images to bitmaps, which were previously passed from my java application. I do this using AndroidBitmap_lockPixels/AndroidBitmap_unlockPixels. Basically, it renders the image correctly, but there're strange effects: sometimes the application gets stuck, or after some time AndroidBitmap_lockPixels always returns -3 (ANDROID_BITMAP_RESULT_ALLOCATION_FAILED). I guess this is because I update these bitmaps not from the GUI thread, isn't it? If so, what would be correct way to "post" this operation to the GUI thread? Is it possible in jni ? (...)
• 16:20
  FFMpeg: CFLAGS=-D__STDC_CONSTANT_MACROS ./configure where? - olidev Newest 'ffmpeg' Questions - Stack Overflow
  I got this problem " 'UINT64_C' was not declared in this scope" while using the ffmpeg library for Eclipse running under Ubuntu. After a while, I have found this solution: http://code.google.com/p/ffmpegsource/issues/detail?id=11 But I could not know how to this: This should be fixed in our build system no matter what version of ffmpeg you're using. If you're still getting it, run configure like so: CFLAGS=-D__STDC_CONSTANT_MACROS ./configure and your problems should go away. This applies to other C++ programs using ffmpeg as well and not just to ffms2, but I can't (...) -- http://code.google.com/p/ffmpegsource/issues/detail?id=11
• 15:50
  Enabling rtmp_swfurl option in FFmpeg - Mustafe Newest 'ffmpeg' Questions - Stack Overflow
  In Unix, in order to process RTMP live stream URLs some live streams needs swfurl, pageurl extra. We are able to pass this parameters to the RtmpDump and pipe it to the FFmpeg. However some FFmpeg has rtmp_swfurl its own. How can we enable this options in FFmpeg, not all of them have. Although I have latest version I do not have them.
• 12:11
  How can I capture low resolution video on Android reliably across a range of devices? - MisterMat Newest 'ffmpeg' Questions - Stack Overflow
  Hello Android video experts :) I am developing an Android application which allows the user to capture video and upload it to a remote server (it's more involved than that but the rest of the app is not important). Because of the upload requirement, it is important that the video is of a reasonable size, so not super high resolution. Let's say a max of 680x480 or 10Mb/minute. This is no problem on Apple devices. I have had what can only be described as a complete nightmare trying to capture video at a reasonably low bitrate reliably across a range of Android devices. As I (...)
• 14:07
  create thumbnails for mp4 using ffmpeg - user1411837 Newest 'ffmpeg' Questions - Stack Overflow
  Iam using ffmpeg with php to create thumbnails for videos on the fly .It saves the thumbnails to a particular file and then i retrieve it using php. I want to create thumbnails for all types of videos possible. The problem with ffmpeg that iam facing is that iam not able to create thumbnails for videos with .mp4 extensions. &1"; ?>
• 10:02
  Cropping black bars in video with ffmpeg on ubuntu changes video size - pramod Newest 'ffmpeg' Questions - Stack Overflow
  I have a source video size that's 720x576 with black rectangles on the top and bottom. I want to remove the black rectangles and set the output video size to 640x352. I tried -vf cropdetect and the value it gave was 640:192:0:80. However, putting that same value in crop= changes the output video size. How can I fix this? E.g.: ffmpeg -i all_the_best_test.mpg -s 640x352 -deinterlace -b 500k -minrate 500k \\ -maxrate 500k -aspect 1.82 -force_fps -vcodec libx264 -me_method 10 \\ -vf crop=640:192:0:80 -r 25 -acodec libfaac -ac 2 -ar 44100 -ab 96k -subq 6 \\ -vpre medium (...)
• 11:32
  exec() does not return to PHP process - Ivo Renkema Newest 'ffmpeg' Questions - Stack Overflow
  I am running FFMPEG from PHP with the EXEC command. I am working on a XAMP stack. $command = 'ffmpeg -y -i input output 2>logfile'; exec ($command); // after FFMPEG handling... As you can see, I am redirecting FFMPEG's output to a log file. This works fine from smaller video files (up to approximately 10 MB). My problem is that for larger video files, any PHP commands after the exec() will not get executed. Note however, that the FFMPEG process works just fine. The log file shows that FFMPEG terminates OK, and the resulting output file is also good. My max_execution_time (...) -- max_time_limit
• 10:17
  FFMPEG & JNI : How to decode from URL - Hafedh Haouala Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to make an android application that uses the FFMPEG for decoding videos that are not supported by Android ( not on all the devices at least ): MPEG-TS & h264 Main Profile. So, until now, I was able to use FFMPEG from JNI to decode some local video with the above specs, but my goal is to make the FFMPEG decode data from a streaming URL (http://127.0.0.1:1666/) on which I will send buffers from an android service (for certain reasons) So, basically, I have two questions : how I will be able to do the decoding from a streaming URL as I couldn't find any good example (...)
• 02:24
  How to convert swf file to pdf or mp4 file type [closed] - Rouge Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to generate images from many swf files. I have search web all day and tried some methods but still have idea how to do it. FFMpeg apparently won't do it because there is an error saying Compressed SWF format not supported when I use command line to convert. My last post. Generate image from a swf file issue Since I have generated images from mp4 and pdf files before, I thought I can convert swf to those formats first then using ffmpeg to get the images. I have also searched web for converting swf to pdf and mp4 but still have no results. Can anyone show me any tips (...)
• 08:20
  FFmpeg screencast recording: which codecs to use? - mkaito Newest 'ffmpeg' Questions - Stack Overflow
  I've been experimenting with recording screencasts using FFmpeg's X11grab module, which has worked more or less fine so far. I understand that a/v encoding is a complex process with many fine details, but I'm doing my best to learn. I'd like to do "lightweight" recording of a video stream, that puts as little strain as possible on the system while the stream is being recorded. I record two audio streams separately with pacat and sox. Later, the whole thing is filtered, normalized, encoded, and combined into a Matroska container. Right now, I'm having ffmpeg record a (...)
• 08:21
  Synchronizing screencasting (ffmpeg) and capturing from the webcam (OpenCV) - lyuba Newest 'ffmpeg' Questions - Stack Overflow
  As from my previous questions, I am trying to build a simple eye tracker. Decided to start from a Linux version (run Ubuntu). To complete this task one should organize screencasting and webcam capturing in such way that frames from both streams exactly match each other and there is the same number of frames in each of them totally. Screencasting fps fully depends on the camera's fps, so each time we get the image from the webcam we can potentially grab a screen frame and stay happy. However, all the tools for the fast screencasting, like ffmpeg, for example, return the .avi file as (...)
• 08:23
  Desktop streaming to Wowza server using ffmpeg - Gergely Lukacsy Newest 'ffmpeg' Questions - Stack Overflow
  Recently, I'm trying to utilize ffmpeg for streaming live desktop screen to a Wowza media server. I have partial success on the subject so far: I've managed to record desktop screen using the UScreenCapture directx dshow filter, and I'm also able to send this record to the server. However, when I'm trying to send the screen directly to the server, it fails every time. The player is buffering pretty slowly, and shows a blank screen when it's done (the counter keeps counting). So, here are the working methods for recording screen: ffmpeg -f dshow -i (...)
• 01:46
  Generate image from a swf file issue - Rouge Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to generate first frame of a swf as a thumbnail image so the user can see it before they open the swf file. 1.Using FFMpeg ffmpeg -i movie.swf -f image2 -vcodec png movie%d.png using command line with ffmpeg to generate images. the above command will give me errors saying [swf ⓐ 0x17937a0] Compressed SWF format not supported 2.Using swftools Their website provide a tar file to download however, I only have the command line access in the server so I won't be able to install the tools. I need to use server side technology because I have hundreds of swf (...)

23 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 20:27
  FFmpeg Live Stream - Loop Video? - Dread-Eye Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to stream a video loop to justin.tv using FFmpeg? I have managed to loop an image sequence and combine it with line in audio: ffmpeg -loop 1 -i imageSequence%04d.jpg -f alsa -ac 2 -ar 22050 -ab 64k \\ -i pulse -acodec adpcm_swf -r 10 -vcodec flv \\ -f flv rtmp://live.justin.tv/app/ Is it possible to do this with a video file?
• 19:31
  php library generate thumbnail from video issue - Rouge Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create thumbnail image from a MP4 file using ffmpeg php library. I have $ffmpeg ="/usr/bin/ffmpeg"; $image_source_path = '/project/a1/a1.mp4'; $ALL_PLACE_WIDTH = 300; $ALL_PLACE_HEIGHT = 270; $image_cmd = " -r 1 -r 0.0001 -s ".$ALL_PLACE_WIDTH."x".$ALL_PLACE_HEIGHT." -f image2 "; $dest_image_path = '/project/a1/foo-%03d.png'; $str_command= $ffmpeg ." -i " . $image_source_path . $image_cmd .$dest_image_path; shell_exec($str_command); I only need the first frame of the video but my codes would generate 2 images of the video which is not what I desired. Can (...)
• 19:34
  Getting friendly output status of FFMPEG transcode - SamIAm Newest 'ffmpeg' Questions - Stack Overflow
  When I transcode a file using ffmpeg -i input.avi -vcodec libx264 output.mp4 the ffmpeg program will show the status of the file being transcoded bit by bit. It will fill up the screen and if I use a for loop to transcode multiple files, after a while I do not know which file it is up to. Is there a way to update only the last line on the bash screen when it is transcoding?
• 17:02
  What are the encoding techniques to be used while creating 3gp videos on iPhone - Mahesh Newest 'ffmpeg' Questions - Stack Overflow
  Some converted 3gp video using ffmpeg library, played on iphone and some not played and that all video played on android,blackberry and J2ME without issues. please suggest to what type of encoding to be used while creating 3gp videos which is play in iphone without issues.
• 16:48
  Compiling ffmpeg for IOS (R_ABS reloc error) - Oliver Hume Newest 'ffmpeg' Questions - Stack Overflow
  I've been trying to compile the ffmpeg libraries for IOS. I can get it to work if I use --disable-asm, but for performance I'd like to build with them enabled. This is one of many configure commands I've used. ./configure --prefix=armv7 --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --enable-avresample --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk" --target-os=darwin (...)
• 06:49
  ffmpeg FLV to FLV conversion fails [closed] - leon Newest 'ffmpeg' Questions - Stack Overflow
  I am using ClipBucket. I have set up ffmpeg, and I can convert AVI, WMV files to FLV video files without any problem, but now I am trying to convert a FLV video file to FLV video file with different video quality. However, there is an error in the conversion. Can someone help me please? Logs: Preparing file... Unknown file details - Unable to get video details using FFMPEG Converting Video Conversion Command : /usr/local/bin/ffmpeg -i /home/myspace86/myspace86.com/files/conversion_queue/136667418894906.flv -f flv -vcodec libx264 -r 30 -vf (...)
• 12:54
  FFmpeg for iOS5 - brad_roush Newest 'ffmpeg' Questions - Stack Overflow
  Has anyone been able to compile ffmpeg libraries using the iOS5 sdk? I have found scripts that use the 4.3 sdk but nothing for iOS5. I would assume that libraries built with the old sdk and armv7 will still be compatible for iOS 5. Here is the command I am trying to use: ./configure \\ --cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \\ --as='gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \\ --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk \\ (...)
• 11:51
  Android: Not able to Run ffmpeg-1.0.1 and above - Maddy Newest 'ffmpeg' Questions - Stack Overflow
  I'm able to compile ffmpeg-0.8.14 and its creating the library file. If I compile ffmpeg-1.0.1 and above it is showing the following error. Error: modifying Makefiles... generating av.mk in ffmpeg... start ndk-building... /android-ndk-r7b/build/core/build-binary.mk:41: * target file `clean' has both : and :: entries. Stop. Can anyone help me?
• 09:53
  Reading out specific video frame using FFMPEG API - Michael IV Newest 'ffmpeg' Questions - Stack Overflow
  I read frames from video stream in FFMPEG using this loop: while(av_read_frame(pFormatCtx, &packet)>=0) // Is this a packet from the video stream? if(packet.stream_index==videoStream) // Decode video frame avcodec_decode_video2(pCodecCtx,pFrame,&frameFinished,&packet); // Did we get a video frame? if(frameFinished) sws_scale(img_convert_context ,pFrame->data,pFrame->linesize,0, pCodecCtx->height, pFrameRGBA->data, pFrameRGBA->linesize); printf("%s\\n","Frame read finished "); ExportFrame(pFrameRGBA->data[0]); break; // Save the frame to disk printf("%s\\n","Read next frame (...)
• 10:40
  shared library built with g++ compile is works and with automake compile can not be used - user2310175 Newest 'ffmpeg' Questions - Stack Overflow
  I'm building a shared libraries on CentOS 6.2. The shared library will be build have some cpp files,headers,c shared libraries and ffmpeg.The shared library is used to convert videos. When i use the g++ compile like this: g++ DataType.h h264function.h h264function.cpp videoconvert.h videoconvert.cpp stdafx.h stdafx.cpp YV12toRGB.h YV12toRGB.cpp -lMPCtrl -lavcodec -lavformat -lavutil - lhcnetsdk -lPlayCtrl -lpthread -fPIC -shared -o libtest.so It can work properly,and the video can be converted as standard h264 coded.That seems the files used for building the library is good.But when (...)
• 04:55
  Parsing avconv/ffmpeg rawvideo output? - DigitalMan Newest 'ffmpeg' Questions - Stack Overflow
  I'm about to begin a project that will involve working with the output of avconv/ffmpeg, pixel-by-pixel, in rgb32 format. I intend to work with a raw byte stream, such as from the pipe protocol. Basic pointer arithmetic (C/C++) will be used to iterate over these pixels, and modify them in arbitrary manners in real-time. I've created a very small file using rawvideo format and codec, and opened it up in a hex editor. As expected, it's just a series of pixels, read right to left, top to bottom. No distinguishing between lines - no problem, if you know how wide the video is (...)
• 02:50
  Unmapping memory-mapped images that are created during processing - user2309283 Newest 'ffmpeg' Questions - Stack Overflow
  I have a pretty big issue, although I only have the symptoms, and a theory on the cause. I have a C++ application under Windows 7x64 that uses system calls to FFMPEG 0.7.13 to extract frames from videos. When running, the parent application maintains a nice, predicable memory footprint in memory profilers (task manager, RAMMap) of about 2MB. I can see the individual calls to FFMPEG also come and go without incident. The trouble is, after about 100 calls to FFMPEG, and 70,000+ PNGs created (no one directory has more than 1500 pngs), the Windows memory page size raises gradually from about (...)
• 01:57
  ffmpeg flv to flv conversion compress - leon Newest 'ffmpeg' Questions - Stack Overflow
  I am using ClipBucket. I have set up ffmpeg environment, I can convert avi, wmv files to FLV video files without any problem, but now I am trying to convert a FLV video file to FLV video file with different video quality. However, there is error in the conversion. Can someone help me please? Logs: Preparing file... Unknown file details - Unable to get video details using FFMPEG Converting Video Conversion Command : /usr/local/bin/ffmpeg -i /home/myspace86/myspace86.com/files/conversion_queue/136667418894906.flv -f flv -vcodec libx264 -r 30 -vf (...)

22 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 20:22
  getting following error while installing ffmpeg-php on PHP v5.4.14 / CentOS 5.9 [migrated] - user1048339 Newest 'ffmpeg' Questions - Stack Overflow
  Having trouble installing ffmpg-php on centos, SSH shows following error after commands: ./configure make make install ..... /usr/local/src/ffmpeg-php-0.6.0/ffmpeg_movie.c:1215: warning: âavcodec_decode_vi deoâ is deprecated (declared at /usr/local/include/libavcodec/avcodec.h:3895) /usr/local/src/ffmpeg-php-0.6.0/ffmpeg_movie.c: In function â_php_get_av_frameâ: /usr/local/src/ffmpeg-php-0.6.0/ffmpeg_movie.c:1282: warning: âhurry_upâ is depr ecated (declared at /usr/local/include/libavcodec/avcodec.h:1388) /usr/local/src/ffmpeg-php-0.6.0/ffmpeg_movie.c:1284: warning: âhurry_upâ is depr ecated (...)
• 23:01
  Fail to use Vitamio Android ffmpeg library: cannot locate '__aeabi_llsl' - user1914692 Newest 'ffmpeg' Questions - Stack Overflow
  I am following exactly the instruction of vitamio to build the ffmpeg library on Android. Compilation works, and I get libffmpeg.so, as well as several static libraries, such as libavcodec.a, libavformat.a, etc. I copied libffmpeg.so, as well as other lib*.a (in case I will use lib*.a later) in the jin folder. Then I use it in the jni part of my Android ffmpeg application. The jni part works independently in C++. In Android.mk, I tried different settings, but there are always error. The Android.mk settings are: LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) include (...) -- instruction of vitamio to build the ffmpeg library on Android
• 17:34
  How can I use ffmpeg's swscale to convert from NV12 to RGB32? - Asik Newest 'ffmpeg' Questions - Stack Overflow
  Say I have an NV12 frame in memory as an array of bytes. I know: its Width and Height its Stride (total width of a line including padding), which is the same for Y and UV components as per NV12 specification I know where Y begins, U begins at Y + (Stride * Height), and V begins at U + 1 (interleaved with U). Now this is what I have so far: SwsContext* context = sws_getContext(frameWidth, frameHeight, AV_PIX_FMT_NV12, frameWidth, frameHeight, AV_PIX_FMT_RGB32, 0, nullptr, nullptr, nullptr); sws_scale(context, So I don't know what the parameters to sws_scale should be: srcSlice : a (...) -- sws_scale
• 17:19
  Compile ffmpeg with librtmp - HighFlyingFantasy Newest 'ffmpeg' Questions - Stack Overflow
  When compiling ffmpeg for OSX, I can simply use the: ./configure --enable-librtmp --enable-gpl command and get a build that can I/O with an rtmp stream. If I attempt to compile for iOS using: ./configure \\ --disable-ffmpeg \\ --disable-ffplay \\ --disable-ffprobe \\ --disable-ffserver \\ --disable-mmx \\ --enable-gpl \\ --enable-shared \\ --enable-librtmp \\ --enable-avresample \\ --enable-cross-compile \\ --enable-pic \\ --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs /iPhoneOS6.1.sdk" \\ --target-os=darwin \\ (...)
• 17:00
  Unresolved externals trying to use ffmpeg - Asik Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use some functions from ffmpeg and am running into resilient linker errors. Here's what I did: Downloaded the latest 32-bit "Dev" build from http://ffmpeg.zeranoe.com/builds/ (i.e. ffmpeg-20130418-git-ee94362-win32-dev) Created a "General - empty" C++ project in Visual Studio 2012 Premium Added the [ffmpeg]/lib folder to Linker -> Input -> "Additional Library Directories" Added "swscale.lib;avutil.lib;avformat.lib;avdevice.lib;avcodec.lib;" to Linker -> Input -> "Additional Dependencies" Added the following under C++ -> General -> Additional Include Directories: (...) -- http://ffmpeg.zeranoe.com/builds/
• 15:22
  Livestream of prerecorded flv videos with ffmpeg and red5 - user2060812 Newest 'ffmpeg' Questions - Stack Overflow
  My goal is to acheive the following steps :- rtmp livestream of prerecoreded flv videos using ffmpeg. videos should be played continuously just like a tv station. We are currently using red5 and ffmpeg to acheive this goal and we have successfully published the live stream of prerecorded single video to jwplayer using the following conversion command : for i in *.avi; do ffmpeg -i $i -acodec copy -vcodec copy -f flv rtmp://localhost/oflaDemo/livestream But the problem comes when we need to livestream two videos one after the other. User have to click play button again in order to (...)
• 14:27
  app crashed at avformat_find_stream_info - nautilusvn Newest 'ffmpeg' Questions - Stack Overflow
  I write a native method to simply get the codec id of a video, but my app never pass this line 'avformat_find_stream_info(pFormatCtx, NULL)' here is my native method: int get_video_info(JNIEnv *env, jobject thiz, jstring strInFile) AVFormatContext *pFmtCtx; AVCodecContext *pCCtx; AVCodec *pCd; AVFrame *picture; int i, videoStream = -1, error = 0; const char *in_file_name = (*env)->GetStringUTFChars(env, strInFile, NULL); av_register_all(); LOGI(1, "HERE 0 %s", in_file_name); // app passed here /*Open video file*/ pFmtCtx = avformat_alloc_context(); (...)
• 14:05
  Image sequence to video stream? - Hauns TM Newest 'ffmpeg' Questions - Stack Overflow
  Like many people already seem to have (there are several threads on this subject here) I am looking for ways to create video from a sequence of images. I want to implement my functionality in C#! Here is what I wan't to do: /*Pseudo code*/ void CreateVideo(List imageSequence, long durationOfEachImageMs, string outputVideoFileName, string outputFormat) // Info: imageSequence.Count will be > 30 000 images // Info: durationOfEachImageMs will be I know there's a project called Splicer (http://splicer.codeplex.com/) but I can't find suitable documentation or clear examples that (...) -- http://www.codeplex.com/Splicer/Wiki/View.aspx?title=News%20Feeds&referringTitle=Home
• 09:59
  FFMPEG - Batch convert subfolders - user2306403 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to set up a Windows batch file to convert a number of MP4 files using FFMPEG. There are a number of files in multiple subfolders, therefore I need the script to execute on each file in each subfolder. I'm afraid I don't have much experience of using batch files but from my research I've got the following command text: FOR %%i in (*.mp4) /R DO (ffmpeg32 -i "%%~ni.mp4" -map 0:0 -map 0:1 -map 0:1 -c:v copy -c:a:0 aac -b:a 128k -ac 2 -strict -2 -cutoff 15000 -c:a:1 copy "%~ni&(2).mp4") The script basically needs to add an AAC audio stream to an existing MP4 file, (...)
• 09:51
  How to convert multiple files from mp4 to flv using a shell script - jerdiggity Newest 'ffmpeg' Questions - Stack Overflow
  Assuming I had a bunch of videos sitting inside the directory /home/user/videos/awaiting_conversion how would I go about using cron to run a script similar to this one to batch convert each video into a different format? /bin/sh -c $'nice /usr/bin/ffmpeg -i \\044'\\'$'/home/user/videos/awaiting_conversion/video_file_1.mp4'\\'$' -s \\044'\\'$'480x320'\\'$' -vcodec libx264 -acodec libmp3lame -ab \\044'\\'$'64k'\\'$' -vpre fast -crf \\044'\\'$'30'\\'$' -ar \\044'\\'$'22050'\\'$' -f (...)
• 12:23
  Retrieve orientation info for video under Android - C Young Newest 'ffmpeg' Questions - Stack Overflow
  Just like ExifInterface.TAG_ORIENTATION's working for JPEG, how can I retrieve orientation info for video ? For example I record a video in portrait mode, the orientation of video should be 90 or 270. And when I record a video in landscape mode, the value should be 0 or 180. When playing video, MediaPlayer in SDK always works correctly, but I don't find any way to retrieve this info. Finally, if I cannot get orientation of video using android SDK, can I get this info using FFMPEG ? Thanks very much for your (...)
• 12:15
  PHP - Create a video from images without ffmpeg - Stefano Giacone Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to create videos from a list of still images using PHP, but I can't install ffmpeg on my server, is there a way to achieve this? I don't know anything about perl, but I can write perl code on my server, so if it's not possible on PHP is it possible with perl? (remember that I can't install anything on my server!) Thanks!!
• 03:24
  vitamio service - user1964369 Newest 'ffmpeg' Questions - Stack Overflow
  I know that Vitamio will not work without the following condition: if (! io.vov.vitamio.LibsChecker.checkVitamioLibs (this)) return; But how does it add to the Service. I ran the demo I have everything works fine, but how to work in Servais
• 03:37
  Video stream played too fast if HTTP Live Stream starts at the beginning - monkeymad2 Newest 'ffmpeg' Questions - Stack Overflow
  Bit of an odd problem this, I'm building a server that Transcodes video and streams it to the WiiU. The WiiU seems to have quite good support of HTTP Live Streams, but I'm running into a problem where the video stream will play about x3 faster than intended (the audio plays at normal rate). I'd figure something was up with my ffmpeg command, but if I let the stream run (so the first segment grabbed by the WiiU isn't actually the first segment) before I actually connect to it the WiiU will play the video at the normal rate! Here's the ffmpeg command I've been (...)

21 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 11:46
  ffmpeg slideshow piping input and output for image stream [migrated] - charly Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to make from a list of images a video and then I will directly upload it. I have managed so far to create a video for the images with: cat *.jpg | ffmpeg -r 1 -f image2pipe -vcodec mjpeg -i - foo.mp4 It works well and I'm happy with it. However, now I would like to pipe the output and I can't really manage to do this. I've tried a couple of like: cat *.jpg | ffmpeg -f image2pipe -r 1/5 -vcodec mjpeg -i - pipe:1 | cat > p.mpeg (for the moment I would just like to pipe back in a file just to test and then I'll had the direct upload). I've read in another (...)
• 18:54
  C# library for audio resampling that has the same abilities as FFmpeg - Designation Newest 'ffmpeg' Questions - Stack Overflow
  I have to use a pure C# solution for resampling audio, which can produce me the exact same results as FFmpeg's audio sampling can. FFmpeg first builds some kind of polyphase filter bank, and then uses that for the sampling process (sorry for the vague phrasing, but I'm not too familiar with this topic). According to this brief documentation, the initialization can be customized this way: AVResampleContext* av_resample_init( int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff ) The parameters are: out_rate: output sample rate in_rate: (...) -- documentation
• 18:42
  FFMPEG avformat_open_input returns unpopulated Format context - Michael IV Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to load avi and flv files programatically with FFMPEG API.The files seem to get loaded because avformat_open_input doesn't return 0 .But when inspecting AVFormatContext variable for every property in the inspector I am getting just "Unable to read memory" .Here is how I do it : av_register_all(); avcodec_register_all(); AVFormatContext *pFormatCtx=avformat_alloc_context(); if(avformat_open_input(&pFormatCtx,"assest/comp1.avi",NULL,NULL) !=0) printf("%s","Movie load Success"); else printf("%s","Movie load Fail"); I am using VisualStudio 2010 C++ compiler .Windows 7. (...)
• 17:54
  How to convert mp4 to flv a bunch of files? - jerdiggity Newest 'ffmpeg' Questions - Stack Overflow
  Assuming I had a bunch of videos sitting inside the directory /home/user/videos/awaiting_conversion how would I go about using cron to run a script similar to this one to batch convert each video into a different format? /bin/sh -c $'nice /usr/bin/ffmpeg -i \\044'\\'$'/home/user/videos/awaiting_conversion/video_file_1.mp4'\\'$' -s \\044'\\'$'480x320'\\'$' -vcodec libx264 -acodec libmp3lame -ab \\044'\\'$'64k'\\'$' -vpre fast -crf \\044'\\'$'30'\\'$' -ar \\044'\\'$'22050'\\'$' -f (...)
• 15:52
  How to create streamable audio file with ffmpeg? - Gabriel Petrovay Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to write streamable (fragmented?) mp4 files with FFMpeg. But the default of the FFMpeg bahavior of the -f mp4 format is not this one. Take for example this AAC-LC MP4 test file save it as aac_lc_in.m4a and run the ffmpeg command: ffmpeg -y -i aac_lc_in.m4a -strict -2 -codec copy -f mp4 aac_lc_out.m4a The result is a non-streamable file (put it on a server and try to load it in your browser. It only starts after it is completely downloaded). This does not happen with the original file that can be started before the download completes. I also tried using the mp4 format (...) -- AAC-LC MP4 test file
• 05:45
  How to obtain titles and chapters information in DVD? - Tarhan Newest 'ffmpeg' Questions - Stack Overflow
  I found many question about creating DVD menu using ffmpeg but i did not find any one about programmically access to DVD structure information. When i using libav(or ffmpeg) library i can open DVD image (iso file) and access to video, audio and subtitle streams. But i could not find any API. I can play video and found information using VLC player (and so libvlc library). But I need to do some processing on audio and subtitle stream programmically. I don't want to split VOBs using tools like SmartRipper, and only then do processing. Does libab(ffmpeg) contain any API for dealing with (...)
• 03:55
  Record RTSP stream with FFmpeg libavformat - chatoooo Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to record RTSP stream from Axis camera with FFmpeg libavformat. I can grab video from files and then save it to another file, this is OK. But camera sends strange data, FPS is 100 and camera sends every 4th frame so result FPS is about 25. But libavformat set packets dts/pts for 90000 fps (default?) and new file stream has 100fps. Result is one hour video with only 100 frames. Here is my code #include #include #include #include #include int main(int argc, char** argv) AVFormatContext* context = avformat_alloc_context(); int video_stream_index; av_register_all(); (...) -- http://dl.dropbox.com/u/1243577/test.avi

20 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 19:14
  I ues FFMPEG to convert bitmap to yuv,and try to save it,but failed - liaoyuandeyehuo Newest 'ffmpeg' Questions - Stack Overflow
  I use this way to convert bitmap to yuv Save bitmap to video (libavcodec ffmpeg) and then save the buffer like this: FILE* fp=fopen("aha.yuv","w"); if(!fp) return NULL; fwrite(outPic->data[0],nbytes,1,fp); fwrite(outBuffer,nbytes,1,fp); fclose(fp); but it has only several lines. All most all of the .yuv file is gray. I am sure the inbuffer points to the input BGR32 data. So where is wrong? Is The way to save the outBuffer right?
• 18:49
  ffmpeg: Invalid segment filename template 'stream05d.ts' - Wildan Muhlis Newest 'ffmpeg' Questions - Stack Overflow
  I have tried to use http live streaming with ffmpeg windows build (http://ffmpeg.zeranoe.com/builds/) Here's the command ffmpeg.exe -v 9 -loglevel 99 -re -i tes.avi -an ^ -c:v libx264 -b:v 128k -preset medium ^ -flags -global_header -map 0 -f segment -segment_time 4 ^ -segment_list test.m3u8 -segment_format mpegts stream%^05d.ts but an error message raised, [segment ⓐ 045f5840] Codec for stream 0 does not use global headers but container format requires global headers [segment ⓐ 045f5840] Selected stream id:0 type:video [mpegts ⓐ 062f2540] Invalid segment filename template (...) -- http://ffmpeg.zeranoe.com/builds/
• 15:26
  ffmpeg: Invalid segment filename template 'streamtes.bat5d.ts' - Wildan Muhlis Newest 'ffmpeg' Questions - Stack Overflow
  I have tried to use http live streaming with ffmpeg windows build (http://ffmpeg.zeranoe.com/builds/) Here's the command `ffmpeg.exe -v 9 -loglevel 99 -re -i tes.avi -an ^ -c:v libx264 -b:v 128k -preset medium ^ -flags -global_header -map 0 -f segment -segment_time 4 ^ -segment_list test.m3u8 -segment_format mpegts stream%05d.ts` but an error message raised, Invalid segment filename template 'streamtes.bat5d.ts' What's this error message mean and how to solve it? (...) -- http://ffmpeg.zeranoe.com/builds/
• 13:51
  FFmpeg "Could not open file" error message when processing with PHP - FlyingCat Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg to get the image from several video files. I got my ffmpeg codes ready but I got the following error when I exec my codes. ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Apr 2 2013 17:02:36 with gcc 4.6.3 *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be removed in a future release. Please use avconv instead. //files info... //files info... Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p' //file info... [buffer (...)
• 09:43
  Is there a way to get exactly a 1 second clip using ffmpeg with the came codec AAC to AAC - David Redding Newest 'ffmpeg' Questions - Stack Overflow
  If I have an .mp4 file with a video stream and an audio stream. I f I execute this command: ffmpeg -i input.mp4 -ss 00:00:14.000 -t 00:00:01.000 -vn -c:a libfaac audio.m4a The result is Duration: 00:00:01.02, start: 0.021179. I want to make sure the start time begins at 0 so I resample it using: ffmpeg -i audio.m4a -ss 00:00:00.000 -t 00:00:01.000 -c:a libfaac audio2.m4a The result of this command has Duration: 00:00:01.02, start: 0.000000. Is there a way to get exactly 1 second as the final result with a 0 value for the start? I in previous attempts I have used the flags -map 0:1 -ab (...)
• 10:05
  file size increasing when while uploading and converting video to flv with ffmpeg - Dhirendra Singh Dhabhai Newest 'ffmpeg' Questions - Stack Overflow
  I need to upload and convert video from any format to flv. i'm doing this with ffmpeg and using this ffmpeg command ffmpeg -i input.mp4 -vcodec flv -sameq -ar 22050 -f flv output.flv this command is running fine but the problem is the file size of output file is 5 times grater than the original input file and if i reduce it it reduces the quality also, need help.
• 05:58
  Problems with ffmpeg command line on android - user2193172 Newest 'ffmpeg' Questions - Stack Overflow
  I managed to compile the ffmpeg Static build. But when I am trying to call the ffmpeg command line I get a Java IOException: No such file or Directory. My code is as follows: public void merge_video(View view) if(ffmpeg_file.exists()) Log.d(null, "ffmpeg exists"); else Log.d(null, "Could not locate ffmpeg in the folder"); File file1 = new File("/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_22.mp4"); if(file1.exists()) Log.d(null,"File 1 exists"); File file2 = new File("/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_28.mp4"); if(file2.exists()) Log.d(null,"File 2 exists"); String[] (...)
• 02:13
  PHP FFmpeg conversion issues for mp4 files - Rouge Newest 'ffmpeg' Questions - Stack Overflow
  I want to get the images out of a mp4 file by using ffmpeg-php. I have $str_command= '/usr/bin/ffmpeg -i /test/ts.mp4 -r 1 -ss 00:00:10 -t 00:00:01 -s 300x300 -f image2 /test/images/'; shell_exec($str_command); However, I got an error message saying Buffering several frames is not supported. Please consume all available frames before adding a new one. I have spent hours on web but couldn't find the answer for this. Can anyone help me about this? Thanks so (...)
• 02:07
  Carrierwave and FFMPEG saving to 2 destinations - Rails, Fog, S3 - dodgerogers747 Newest 'ffmpeg' Questions - Stack Overflow
  I have a video model, which uses Carrierwave, Fog, FFMPEG and S3 to handle video files. I have a method in my video model that takes a screenshot before the video is saved to S3. Both Video and screenshot are saved to S3 using 2 Carrierwave Uploader classes, Image_uploader and video_uploader with the video being saved to the Video.file column and screenshot saved at the Video.screenshot. This all works as intended, however, FFMPEG also saves a copy of the screenshot to the rails filesystem, "Rails.root/file_is_saved_here". For now I have FFMPEG saving this file into the (...)
• 03:12
  LNK 2019 unresolved symbol - FFmpeg - Cristina1986 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use FFmpeg to open and read a video .avi I work on win7 x64 with Visual Studio 2010 For now my code is very simple: #include "libavcodec/avcodec.h" #include "libavformat/avformat.h" #include "SDL.h" #include "SDL_mixer.h" int main (int argc, char *argv[]) AVFormatContext *pFile_video; int s, videoStream; AVCodecContext *pCodecCtx; AVCodec *pCodec; AVFrame *pFrame; AVFrame *pFrameRGB; AVPacket packet; int frameFinished; int numBytes; uint8_t *buffer; av_register_all(); if((avformat_open_input(&pFile_video, "AR.avi", NULL,NULL)!=0)) cout nb_streams;s++) (...)

19 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 21:31
  FFmpeg error message when processing - FlyingCat Newest 'ffmpeg' Questions - Stack Overflow
  Hi I am using FFmpeg to get the image from several video files. I got my ffmpeg codes ready but I got the following error when I exec my codes. ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Apr 2 2013 17:02:36 with gcc 4.6.3 *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be removed in a future release. Please use avconv instead. //files info... //files info... Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p' //file info... (...)
• 18:21
  CPU usage overload with Ffmpeg in Video Upload Converter site - Luis Ferrer Raventos Newest 'ffmpeg' Questions - Stack Overflow
  i am working on a video converter site in which you can upload a video an then convert it to the format you want. Everything works great only problem is CPU usage overload of ffmpeg, when I upload 4 instance 4 HD videos CPU usage gets to 70-80% To control this I would like to find a way to low cpu usage or priorizy it, I tried several tutorials like: http://www.nixtutor.com/linux/changing-priority-on-linux-processes/ but don't seem to control that, I tried this and then ffmpeg didn't work had to update it. So once i control CPU usage I would also like to use a php queue system (...) -- http://www.nixtutor.com/linux/changing-priority-on-linux-processes/
• 15:33
  FFMpeg Android Stagefright SIGSEGV error (h264 decode) - Sergey Ochkur Newest 'ffmpeg' Questions - Stack Overflow
  I need to decode h264 file to YUV on Android 2.3+. As I understand I need to communicate with Stagefright, as it`s the only way now, after closing access with OpenMAX IL implementations. I have used FFmpeg 0.10 (and tried 0.9/0.9.1..) for this issue, compiled it with NDK7 (and also tried NDK6b with the same result): ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers built on Jan 28 2012 14:42:37 with gcc 4.4.3 configuration: --target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --cpu=armv7-a --sysroot=/home/grid/Android/Android_NDK/platforms/android-9/arch-arm (...) -- http://pastebin.com/76JLgtXX
• 16:58
  Dealing with long conversion times on nginx, ffmpeg and Ruby on Rails - Graeme Newest 'ffmpeg' Questions - Stack Overflow
  I have developed a Ruby on Rails-based app which allows users to upload videos to one of our local servers (Ubunto 10.04 LTS). The server uses nginx. Through the paperclip-ffmpeg gem, videos are converted to mp4 format using the ffmpeg library. Everything appears to be working fine in production, except Rails' own 500 page (not the customised version I have provided - but that's a different issue) is displayed whenever certain videos are uploaded. Otherwise, videos are being converted as expected. Having done a bit of investigation, I think the default 500 page is being (...) -- paperclip-ffmpeg, ffmpeg
• 08:00
  Is there any way to change bitrate of MP3 file in Android? [closed] - illusion softworks Newest 'ffmpeg' Questions - Stack Overflow
  In Android, there are no classes or libraries to change bitrate of MP3 files. So we must use extended libraries. There are two extended library to do this, one is ffmpeg and another is lame. But in a short time, you can't use it, because if you want to use those libraries in your project, you must learn alot of advanced topics,such as Android-NDK, JNI programming, so on. My question is "Is there another way to change bitrate of MP3 file in Android?"
• 06:28
  ffmpeg output blank image files on CentOS 6.4 [closed] - Juneyoung Oh Newest 'ffmpeg' Questions - Stack Overflow
  0I am trying to capture thumbnail images from a video by using ffmpeg. So I typed command like Below. ffmpeg -i MyVideo.mp4 -s 480x270 -f image2 -vf fps=fps=1/600 thumb%03d.png just like what ffmpeg official site suggested. The length of MyVideo.mp4 is 01:46:03, So I expected total 10 images from it. (because fps=fps=1/600 part means 10minute 1piece.) But output is 12 pieces, and especially first one is broken. When I check it's information in GUI, it says "failed to load (...)
• 11:53
  ffmpeg Video concat demuxer txt path - Steven Mills Newest 'ffmpeg' Questions - Stack Overflow
  I'm making use of the ffmpeg command line process, specifically the demuxer (see here). I'm attempting to run the equivelent of this: ffmpeg -f concat -i C:\\Users\\Username\\AppData\\Local\\mylist.txt -c copy output.avi I've tried it and it works fine in the console, however I can't figure out a way to get this to work through code. I've checked the path is right, I've checked the txt file is named correctly etc. ffmpeg.StartInfo.Arguments = "-f concat -y -i " + ⓐ"C:\\Users\\Username\\AppData\\Local\\Temp\\mylist.txt" + " -c copy output.avi"; ffmpeg.StartInfo.FileName = (...) -- here
• 06:35
  Problem with ffmpeg function avformat_seek_file() - Kael Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to seek the given frame in the video using ffmpeg library. I knew that there is av_seek_frame() function but it was recommended to use avformat_seek_file()instead. Something similar mentioned here. I know that avformat_seek_file() can't always take you to exact frame you want, but this is ok for me. I just want to jump to the nearest keyframe. So i open the video, find videostream and calling it like this: avformat_seek_file( formatContext, streamId, 0, frameNumber, frameNumber, AVSEEK_FLAG_FRAME ). It always returns 0, so i understand it as correct finish. However, it (...)
• 06:57
  Do i still need to convert ffmpeg's RGB frame to YUV for SDL2.0? - James491 Newest 'ffmpeg' Questions - Stack Overflow
  I've been following dranger's ffmpeg tutorial and a few other sdl2.0 tutorials and noticed that they all still use the sws_scale function to convert ffmpeg's decoded frame from RGB to YUV even for an SDL_texture. Is this still the best method for video with textures? Because you can eliminate all of the scaling by setting the SDL_PIXELFORMAT of the texture to an rgb format and then copy ffmpeg's rgb directly without scaling. Am i missing something? Is yuv faster or better in any way for sdl? Or are other people just used to using an SDL_YUVOverlay? UPDATE: I noticed that (...)
• 04:28
  Changing the bit rate of an MP3 bitrate on Android without ffmpeg - illusion softworks Newest 'ffmpeg' Questions - Stack Overflow
  In my project, I have a 320kbps MP3 that is quite large. Since it's so big, I'd like to convert it to use a lower bit rate (about 80kbps). I know that the ffmpeg library exists to do this, but using ffmpeg in Android is very complex. Is there another way to change the MP3 bit rate that does not use ffmpeg in Android?
• 01:00
  ffmpeg - multiline text in metadata (comment tag) - decss Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg to update metadata tags like this way: ffmpeg -i "in.m4a" -acodec copy -metadata artist="artist text" -metadata comment="comment text" "out.m4a" Well, "artist text" and "comment text" is usual plain text, but comment field allows to put multiline text. Each line must have new line character to do it. Something like this: -metadata comment="source: lastfm \\r\\n tags: tag1, tag2 \\r\\n ..." But all characters that I use (\\r\\n, %nl%, ^N) bring no result. I run ffmpeg.exe from PHP script on Windows using shell_exec() function Someone help please, or tell me is it really (...)
• 01:01
  Use FFMPEG on tmp files in PHP - Ronnie Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use FFMPEG on some files that are in the PHP TMP directory during an upload process via $_FILES['videos']['tmp_name'] Is this not possible with a tmp file? The command I do is //-- Probably something like C:\\wamp\\tmp\\*some temp name* $inputFile = $_FILES['videos']['tmp_name']; //-- array("myvideo","mp4"); $outputFile = explode(".", $_FILES['videos']['name']); //-- myvideo.jpg $outputFile = $outputFile[0] . ".jpg"; //run ffmpeg $thumbnail = exec('ffmpeg -loglevel fatal -y -i ' . escapeshellarg($inputFile) . ' -f (...)
• 02:39
  convert lower bitrate mp3 to higher bit rate [closed] - janeman Newest 'ffmpeg' Questions - Stack Overflow
  i had 2000 songs in 128 kbps but in my server space was not there so i have compressed those mp3 to 16kbps and found ok quality on my pc but when i was listening those songs on my iphone i found that sound quality is not good so now i wan t to convert those 16kbps songs to 48kbps which i think will give good sound quality so that users cant differentiate that songs are compressed and it will load fast as well .here is the ffmpeg code i have used to convert 16kbps file to 48kbps . i can see that the size of converted file has increased approx 3 fold but not sure whether it will give the (...)

18 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:58
  HLS - how to create a m3u8 manifest if I have ts files (Ubuntu)? - Richard Knop Newest 'ffmpeg' Questions - Stack Overflow
  So I have found out I can create ts segments of a movie with this ffmpeg command: ffmpeg -i foo.mp4 -codec copy -vbsf h264_mp4toannexb -map 0 -f segment -segment_list out.list -segment_time 10 out%03d.ts But now I don't know how to create a m3u8 manifest file from ts files. Is there some open source library or command in Ubuntu that can do this for me? If not, how difficult is it to create the m3u8 file in Python or some other language?
• 15:55
  FFmpeg How to write video to a file - NoviceAndNovice Newest 'ffmpeg' Questions - Stack Overflow
  What i want is 1. Get video packet from stream source 2. Decode it 3. And write that decoded data as video file(avi, mpeg etc) I can able to get video Packets from a file (as AVPacket) and also can decode and save as an image.(raw)( FFmpeg tutorials show how to do it). But i can not ( do not know ) write that video data to a file(other) which can be played by media players(such as VLC). Best Wishes Ps: Real code samples will be great if possible... Now i make test with av_interleaved_write but i got strange error "non monotone timestamps" ( i have no control over pts values of media (...)
• 13:05
  Embed Image into video - FFMPEG or JW player? - Sri Kumar Newest 'ffmpeg' Questions - Stack Overflow
  So I thought to embed the image as part of video content while converting the m4a to mp4. The output file has the image as video content and it plays as expected in VLC but when the same was streamed from my CDN using JW player, I do not see the image as video content, still it is black and audio is heard. Not sure what is the issue with embeding. I used the FFMPEG to embed image as video content. On the other hand is there any posibility with JW player to overlay an image as video content while audio can be heard in back (...)
• 13:32
  ffmpeg configure for ios - using asm options causes MPx (mp1, mp2, mp3) codecs sound problems - hard gamer Newest 'ffmpeg' Questions - Stack Overflow
  I've made many tests to get good performance for video decoding with ffmpeg on low cpu idevices such as iPad 1 and iPhone 3Gs, and see that using asm option when configuring ffmpeg for cross compiling for ios is very very important for performance.. But when I configure with --enable-asm, the audio stream which using mpx(mp1,mp2,mp) codec sounds squeaky. If I configure with --disable-asm option, than mpx(mp1,mp2,mp) codec sounds well but then the performance is %50 percent of the previous one built with the --enable-asm option... I've also tested these with the ffmpeg versions (...)
• 13:16
  How to reencode flash stream to MP4 or/and WebM inside server implementation? - user2294505 Newest 'ffmpeg' Questions - Stack Overflow
  Hi guys, lets start with this that I'm totally new in video streaming. Currently I have to support one server implemented in C that work as mediator between stream producers and stream consumers. In my case I have one remote machine that generate flash stream and one or more clients that can watch it. The server work as proxy for all of them. We are using our server side implementation for rtmp protocol and for asynchronous work over HTTP we are using libevent library. All this construction work fine in common case. Now we need to transfer this stream to HTML5 clients and we need to (...)
• 09:17
  Encoding Android Camera Frames h263/h264 - Another Guy Newest 'ffmpeg' Questions - Stack Overflow
  I want to implement a Video Chatting app on Android . I created a SurfaceView , get Camera preview and captured the frame as a byte[ ] using Camera.PreviewCallback.onPreviewFrame( ) method . Now I want to encode that byte[ ] to a h263 frame , pass over the network . Also get similar type of frame over network , decode it to a byte[ ] ( or a displayable format ) , and show it in a View . I want to do it at least 15 FPS rate . I am asking help for the encoding/decoding part . For that purpose , which library would be suitable for me ? From where I should start ? Is my starting point wrong (...)
• 08:58
  Multiline text into comment field in ffmpeg metadata - decss Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg to update metadata tags like this way: ffmpeg -i "in.m4a" -acodec copy -metadata artist="artist text" -metadata comment="comment text" "out.m4a" Well, "artist text" and "comment text" is usual plain text, but comment field allows to put multiline text. Each line must have new line character to do it. Something like this: -metadata comment="source: lastfm \\r\\n tags: tag1, tag2 \\r\\n ..." But all characters that I use (\\r\\n, %nl%, ^N) bring no result. Oh, i forgot to notice: I run ffmpeg.exe from PHP script on Windows using shell_exec() (...)
• 08:57
  how to install ffmpeg on macbookpro osx 10.8.3 [closed] - M Irfan Newest 'ffmpeg' Questions - Stack Overflow
  I have downloaded FFMPEG from this link http://www.ffmpeg.org/download.html under FFmpeg Mac OS X Builds section, all builds come with .7z extension i need help how to configure it on my machine. -- http://www.ffmpeg.org/download.html
• 10:33
  Encode images to video by using ffmpeg API？ - Super Astro Newest 'ffmpeg' Questions - Stack Overflow
  I want to encode some image files into one video file, and play each image for 1 second. So I wrote a simple function to encode only one image to a video void PhotoStory::test(char* imagefile,char* videoFile) av_register_all(); avcodec_register_all(); AVCodecContext *pOCtx= NULL; AVCodec *pOCodex = NULL; pOCodex = avcodec_find_encoder(CODEC_ID_MPEG1VIDEO); pOCtx= avcodec_alloc_context3(pOCodex); pOCtx->bit_rate = 400000; pOCtx->width = 640; pOCtx->height = 480; AVRational rational = 1,25; pOCtx->time_base= rational; pOCtx->gop_size = 10; /* emit one intra frame every ten frames */ (...)
• 11:32
  ffmpeg command line working on emulator but not in device in android - rams Newest 'ffmpeg' Questions - Stack Overflow
  i want to convert sequence of images into video.i successfully completed this task in emulator.but in real device its not working.what's the problem.i put the ffmpeg executable files and libraries in system/bin as well as system/lib folder. Runtime.getRuntime().exec("chmod 777 /system/bin/ffmpeg"); chperm=Runtime.getRuntime().exec("ffmpeg -f image2 -i img%4d.jpg adi.avi",null,dir); Toast.makeText(getBaseContext(), "success", Toast.LENGTH_SHORT).show();
• 06:50
  FFMPEG+video+video.js dont show up the video - user1843970 Newest 'ffmpeg' Questions - Stack Overflow
  I have a video content type where I want to show the video to the user. I downloaded video module and video.js for this purpose. I have successfully installed ffmpeg transcoder in apache serv Now I go to admin/config/media/video. Withing players tab I select HTML5 player for mp4 video and video.js to run HTML5 video like below:- Now I go to Video Content Type and add Video field with Video Upload as its type and save it.The video is successfully converted but after clicking on play button nothing happens. Need your help in (...)
• 02:32
  ffmpeg run from shell runs properly, but does not when called from within .NET - Bevin Newest 'ffmpeg' Questions - Stack Overflow
  I'm attempting to use ffmpeg (compiled on Windows with Cygwin) in a C# program, by using the Process class to spawn an ffmpeg instance. However, I've hit a rather odd bug that doesn't make much sense. When I run ffmpeg directly from a shell (be it Cygwin's bash, PowerShell, cmd), ffmpeg can properly decode and reencode files without any issues: PS C:\\audio> ffmpeg -i .\\sound1.wav -acodec libvorbis -f ogg abc.ogg ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers built on Apr 8 2013 15:10:40 with gcc 4.5.3 (GCC) configuration: --disable-encoder=vorbis (...)

17 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:21
  SDL_SetVideoMode fails under Android? - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to buid a Video Player for android using libsdl for rendering and libav for decoding. First, i cross-compiled the sdl library for Android platform. Then i ceated the jni layer for my sdl cpp file(already tested under ubuntu) but when i test it under Android it fails(with fatal error segv11 signal) exactly at the beginning in the following instruction: this->screen = SDL_SetVideoMode(width, height, 0, 0); Does anyone know any workaround for this error? Does anyone know how to display video using sdl under android? And is there any instructions or steps that i must follow in (...)
• 19:56
  Encode video of powerpoint presentation for HTML5 playback - user2291446 Newest 'ffmpeg' Questions - Stack Overflow
  We have a number of powerpoint presentations that have been converted to 16:9 aspect ratio and then converted into mp4 "master videos" with an "apple TV" 720p profile. These powerpoint presentations are voice annotated. So in essence, we show a slide and then let the annotation sound play for a while, then go to the next slide, and so on. The resulting mp4 master video is somewhere around 900MB on average. Here is an example of the master video Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 (...)
• 15:16
  FFmpeg Audio Video Synchronisation - Stryker33 Newest 'ffmpeg' Questions - Stack Overflow
  I have been trying to create a video using the video feed from the Android Camera... The preview frames from the camera are captured and are piped to ffmpeg input and audio is captured using AudioRecord (sample rate: 44100, channel: mono) and is feed to ffmpeg using the same technique... The video is generated successfully as expected...But the audio and video appear to be out of sync... The audio initially appears to be lagging from video, at some point it equals the video and then leads from the video as it progresses which clearly states that the playback speed of the audio stream is (...)
• 17:52
  Shell out to FFMPEG from Windows Service sometimes hangs - Jake Stevenson Newest 'ffmpeg' Questions - Stack Overflow
  We have a windows service which runs on multiple machines, waiting for MSMQ messages telling it to convert various files for us. Sometimes the files are video files and we shell out an ffmpeg process to do the conversion and wait for the process to complete or error before moving on. And on some occasions, that ffmpeg process appears to "hang" and we have to RDP to the machine as an admin and manually kill it off using task manager before it can continue to accept new messages. This hung ffmpeg process will stay that way indefinitely, I've waited several days on some occasions. The (...)
• 12:07
  How do I cut an FLV video into several small pieces? [closed] - teddy Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to cut an FLV video to several small FLV videos with FFmpeg through PHP. The small videos may have the same length.
• 11:36
  ffmpeg Could not find input stream [closed] - Peter Walker Newest 'ffmpeg' Questions - Stack Overflow
  I've seen lot's of post on streaming video feeds to ffserver but still haven't found what I wanted. I use not only on the mp4 file but avi and other formats as well. ffmpeg -i test5.mp4 http://localhost:8090/feed1.ffm I keep finding this error. Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test5.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2mp41 encoder : Lavf53.21.1 Duration: 00:05:00.00, start: 0.000000, bitrate: 278 kb/s Stream #0.0(und): Video: mpeg4 (Simple Profile), yuv420p, 640x320 [PAR 1:1 DAR 2:1], 277 kb/s, 25 fps, 25 tbr, 25 (...)
• 15:07
  SDL_SetVideoMode fails - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to buid a video player for android using libsdl for rendering. First i cross compiled sdl library for android platform. then ceated the jni layer for my sdl cpp file(already tested under ubuntu) but when i test it under android it fails(with segv11 signal) exactly at the beginning in the following instruction: this->screen = SDL_SetVideoMode(width, height, 0, 0); Does anyone know any workaround for this error. And is there any instructions or steps that i must follow in order to render SDL gui under (...)
• 14:22
  FFMPEG running in Command Line but not PHP - Freeman Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg build for windows to make video thumbnails . The command works well in command line but not from PHP exec method. am using PHP 5.2.11 Here is the command. "E:/Documents and Settings/x/WINDOWS/ffmpeg" -itsoffset -4 -v "E:/Program Files/Apache Software Foundation/Apache2.2/htdocs/bs/files/videogal/c08c3d20eeb9083ed033577bd154cba6.flv" -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 "E:/Program Files/Apache Software Foundation/Apache2.2/htdocs/bs/files/gallery/8ff43b72b932d2a34e7a6733672ad4d6.jpg" 2>&1 Can somebody help. I checked the permissions they seem fine. (...)
• 00:00
  using ffmpeg plugin with plugin uploaded - Bruno Ribeiro Newest 'ffmpeg' Questions - Stack Overflow
  good he uploads the video registers in the database but does not take the print screen of the video and did not register on the database. analyze($this->video); return $file['playtime_string']; private function rand_duration() ⓐlist($h, $m, $s) = explode(":", $this->get_duration()); $hms = ($h * 3600) + ($m * 60) + $s; $rhms = rand(0, $hms); return date('H:i', mktime(0,0,$rhms,0,0,0)); private function rand_name() $a = base64_encode($this->video); return ⓐmd5(date('Y-m-d H:i:s') * $a); private function get_resolution() $getID3 = new getID3; $file = (...)
• 09:11
  How do i cut .flv format video into small pieces in PHP - teddy Newest 'ffmpeg' Questions - Stack Overflow
  guys. I am trying to cut flv format video to several small flv videos in my PHP programming, the small videos may have the same length of time. But i do not have any ideas about how to do it. I want someone to tell me how to realize this function.Does not need to be detailed, please just tell me the method. Thank you.
• 06:33
  Encoding a screenshot into a video using FFMPEG - mohM Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to get the pixels from the screen, and encode the screenshot into a video using ffmpeg. I've seen a couple of examples but they either assume you already have the pixel data, or use image file input. It seems like whether I use sws_scale() or not (which is included in the examples I've seen), or whether I'm typecasting a HBITMAP or RGBQUAD* it's telling me that the image src data is bad and is encoding a blank image rather than the screenshot. Is there something I'm missing here? AVCodec* codec; AVCodecContext* c = NULL; AVFrame* inpic; uint8_t* outbuf, (...)

16 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 05:59
  trying to efficiently extract images from h264 stream [closed] - Charlie Newest 'ffmpeg' Questions - Stack Overflow
  I have a webcam (Logitech C920) that can generate H.264 stream. I want to encode it into HTTP Live Streaming (HLS) AND extract out 'thumbnail' images about once a second. I have a command that will generate the HLS by itself with the following: /home/root/develop/capture/capture -c -1 -o | ffmpeg -y -r 30 -i - -vcodec copy -f segment -segment_list prog_index.m3u8 \\ -segment_list_flags +live -segment_time 2 -map 0 -segment_wrap 4 \\ -segment_format mpegts out%03d.ts However, when I add in the 'thumbnail' processing, I end up dropping to 12 fps. I used the same command and (...)
• 05:15
  AAC ffmpeg encoding iOS [closed] - HighFlyingFantasy Newest 'ffmpeg' Questions - Stack Overflow
  So I have spent most of the day writing an FFMPEG client for iOS, and I ran into a problem when trying to convert my hardware encoded h.264/aac mov file to h.264/aac flv. I borrowed the muxing.c example code and converted it to modern objective-c. I'm having problems with the aac encoder, which says... I would like to know if it's possible to either add the -strict -2 command at runtime, or compile the library with experimental encoders enabled? Also, my library seems to be missing some encoders (i only tried speex and mp3). I compiled them with: ./configure \\ --prefix=armv7 \\ (...)
• 10:57
  libavcodec get video duration and framerate - Tishu Newest 'ffmpeg' Questions - Stack Overflow
  I have a video encoded in .3gp h.264 and I am looking to get its framerate and duration in C. Here is the code I use after opening the file and finding the appropriate codecs: AVRational rational = gVideoCodecCtx->time_base; LOGI(10, "numerator is %i", rational.num); LOGI(10, "denominator is %i", rational.den); LOGI(10, "duration is %d", gFormatCtx->duration); LOGI(10, "fps is %d", (double)av_q2d(rational)); And here is the output: 12-02 12:30:19.819: I/FFmpegTest(23903): numerator is 1 12-02 12:30:19.819: I/FFmpegTest(23903): denominator is 180000 12-02 12:30:19.819: (...)
• 07:24
  mpeg-ts h264/aac into mp4 container change unplayable on Quicktime playable on VLC [closed] - arbief Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to change the container of a video streamed with HLS into an mp4 file. The capture and conversion is being done with ffmpeg libavformat, the output video is playable in VLC but not on quicktime the quicktime decoder crashes when trying to decode it. I'm not experienced with h264 NAL/PPS/SPS to identify if something is not liked by quicktime there. And I dont know how to get at least an error message from quicktime to maybe have a clue of where the problem lies. I havent changed anything from the h264 packets obtained by ffmpeg. I just pass them along to the ffmpeg (...) -- Example MP4
• 12:50
  exec function not working as expected - DarkRanger Newest 'ffmpeg' Questions - Stack Overflow
  I am running a shell function from php to convert a video file to flash once it is uploaded. The exec function is like this: exec("ffmpeg -i " . WWW_ROOT . "files" . DS . "videos" . DS . $id . $ext . " -ar 22050 -r 32 -f flv -s 640x480 " . WWW_ROOT . "files" . DS . "videos" . DS . $id . ".flv"); // if I echo the string it returns: // ffmpeg -i /home/vceroot/public_html/example.com/test/intraweb/app/webroot/files/videos/516c1203-0484-417a-b047-5488c40293e9.mpg -ar 22050 -r 32 -f flv -s 640x480 (...)
• 11:27
  convert java code to android code [closed] - adityag Newest 'ffmpeg' Questions - Stack Overflow
  I want to mix two audio files in android. First a song from library and second a sound recorded from mic. To begin with, I tried doing it on desktop using JS Resources Audio concat Program Using this code, I can mix/merge/overlap 2 sound wav files on desktop when i use float mix mode (-f). Now I was trying to do this in android environment. But found that javax.sound.sampled.*; used in this code is not supported by android. Can anyone guide me how to deal with this situation ? PS: other approach i tried is trying to use some ffmpg. But frankly, I couldn't understand how to make (...) -- JS Resources Audio concat Program
• 11:04
  ffmpeg packet data from ts file - user2285642 Newest 'ffmpeg' Questions - Stack Overflow
  I am kinda new to ffmpeg, but did enough homework before posting this question. I have a ts file. I want to extract individual packets from it(both audio and video). I am able to generate output file using the below command ffmpeg.exe -i sample.ts -y -c copy -map p:1 output.h264 However, this link is the closest to what I m looking for. ( He uses something called tsinfo.exe which is out of my scope). So, is there any way in ffmpeg to extract packet data from a ts file? Anyone? (...)
• 13:08
  C#: get web camera name for FFmpeg - JustLogin Newest 'ffmpeg' Questions - Stack Overflow
  In my C# app I'm using FFmpeg to stream desktop and it works fine. I also want FFmpeg to publish video from web camera. The problem is, that when I use desktop as input, device name parameter is already known (-i video=UScreenCapture), but it's not when I want to use web camera and microphone. So, my question is, how to get web camera and microphone names using C#.
• 16:55
  error of streaming video using fluent-ffmpeg node.js module - user824624 Newest 'ffmpeg' Questions - Stack Overflow
  I am running the fluent-ffmpeg sample to stream the video, which works well. Now in contract show the video in flashe version based flowplayer, I am now using html5 version flowplayer, but it said the video file not found. app.get('/video2/abc', function(req, res) console.log('/video/:filename'); res.contentType('mp4'); var pathToMovie = 'public/flowplayer/470x250.mp4' ; var proc = new ffmpeg( source: pathToMovie, nolog: true ) .writeToStream(res, function(retcode, error) if(error) console.error('error',error); else console.log('file has been (...) -- sample
• 16:18
  Play FFMPEG Sound Sample with OpenAL - Asim Newest 'ffmpeg' Questions - Stack Overflow
  i am using FFMPEG to load Audio Video from File...with the video its working but i don't know how to play audio samples coming ... here is my routine that is getting audio samples... m_AdotimeBase = (int64_t(m_Adocdec_ctx->time_base.num) * AV_TIME_BASE) / int64_t(m_Adocdec_ctx->time_base.den); if(!m_Adofmt_ctx) //AfxMessageBox(L"m_timeBase"); return FALSE ; int64_t seekAdoTarget = int64_t(m_currFrame) * m_AdotimeBase; if(av_seek_frame(m_Adofmt_ctx, -1, seekAdoTarget, AVSEEK_FLAG_ANY) My problem is i want to listen that coming sample using OPENAL i tried hard to develop using this (...)
• 17:54
  FrameSkipping techniques - ManS Newest 'ffmpeg' Questions - Stack Overflow
  I need to build a frameSkipping tool which can reduce the frame rate of live video stream in C++. So i ask if there are any materials, tutorials about frameskipping techniques or libraries that could help.
• 19:05
  ffmpeg in matlab on windows - Maystro Newest 'ffmpeg' Questions - Stack Overflow
  Is there a way to run ffmpeg commands in matlab on windows. I know on Linux we can use the function system('...') to run any command but how can I do it on windows? any idea would be appreciated Thanks
• 18:17
  Rendering video streaming in android - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  I've successfully cross-compiled a c++ streaming library to the ICS platform This library contains a sample player that uses sdl library to render the resulting decoded streams and libav for decoding that i've also succeeded to cross compile(libav ... classes) .Then, i 've made the necessary jni classes and tested it log tags it seems that everything is fine but now i want to show the result on the screen(show the real streaming not just log messages) I am searching for the easiest way to render my video-stream (just to be sure that everything works fine) Am i obliged to (...)
• 17:55
  FFMpeg encoded video will only play in FFPlay - mohM Newest 'ffmpeg' Questions - Stack Overflow
  I've been debugging my program for a couple of weeks now with the output video only showing a blank screen (was testing with VLC, WMP and WMPClassic). I happened to try using FFPlay and lo and behold the video works perfectly. I've read that this is usually caused by an incorrect pixel format, and that switching to PIX_FMT_YUV420P will make it work universally...but I'm already using that pixel format in the encoding process. Is there anything else that is causing this? AVCodec* codec; AVCodecContext* c = NULL; uint8_t* outbuf; int i, out_size, outbuf_size; (...)
• 22:36
  Issue creating video with FFmpeg from Gource output - user1832408 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a video with FFmpeg from Gource output but FFmpeg fails for some reason. I have no idea why as the error message is quite general. Does anyone have any ideas? Is the Gource output perhaps invalid? set GOURCE=C:\\Program Files\\Gource\\0.39 set FFMPEG=C:\\Program Files\\FFmpeg\\20130412-git-694fa00-win32-static\\bin set SOURCE=src "%GOURCE%\\gource.exe" -1280x720 -o gource.ppm %SOURCE% "%FFMPEG%\\ffmpeg.exe" -y -r 60 -f image2pipe -vcodec ppm -i gource.ppm -vcodec libx264 -preset ultrafast -crf 1 -threads 0 -bf 0 -v verbose gource.x264.avi FFmpeg output ffmpeg version (...)
• 05:04
  sh file imagemagick modification - Love Newest 'ffmpeg' Questions - Stack Overflow
  I have an .sh script that generate thumbnail sprites' images from video. The below codes in the script will output the image similar this: http://s1-www.ltvimg.com/cdn/farfuture/7NO-FuBvaWJK_v34cJrAmHi6L3ywPn1YtImQNzXgTic/mtime:1362848979/sites/default/files/tooltipthumbs-sprite.jpg For now, the dimension of each thumbnail is 108x60, maximum 25 thumbnails(5x5) per image and per image dimension is 540x300. The thumbnail is capture every second of the video, which mean if i have a 75 seconds of video, it will output 75 thumbnails with 3 images. What i need now, i want the script (...) -- http://s1-www.ltvimg.com/cdn/farfuture/7NO-FuBvaWJK_v34cJrAmHi6L3ywPn1YtImQNzXgTic/mtime:1362848979/sites/default/files/tooltipthumbs-sprite.jpg
• 03:42
  C# - Capture RTP Stream and send to speech recognition - dgreenheck Newest 'ffmpeg' Questions - Stack Overflow
  What I am trying to accomplish: Capture RTP Stream in C# Forward that stream to the System.Speech.SpeechRecognitionEngine I am creating a Linux-based robot which will take microphone input, send it Windows machine which will process the audio using Microsoft Speech Recognition and send the response back to the robot. The robot might be hundreds of miles from the server, so I would like to do this over the Internet. What I have done so far: Have the robot generate an RTP stream encoded in MP3 format (other formats available) using FFmpeg (the robot is running on a Raspberry Pi running (...)

15 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:43
  Creating MOV from PNGs with ffmpeg: playback issue in older quicktime (7.6.6) - Jim Lindstrom Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg to create a MOV file from a series of images. When I view the movie in Quicktime 7.7.x, it looks great (left image). When I view in Quicktime 7.6.6 I get this weird issue (on the right): Any idea even what this is, much less how to fix it? Details My source images are a mix of PNGs and JPGs that I pre-process with ImageMagick (to draw text, captions, etc). I store intermediate results as MPCs, and final frames as PNMs. To draw the above frame, I'm doing this: convert -background none -fill white -font my_font.ttf -pointsize 132 -gravity \\ center -size 945x550 (...)
• 22:07
  Damaged h264 stream not working with ffmpeg but working with vlc or mplayer - gregoiregentil Newest 'ffmpeg' Questions - Stack Overflow
  I have a h264 file, coming from an rtsp stream, that is slightly damaged. Some frames are altered. ffmpeg reports: ffmpeg -i stream.mpg ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Apr 2 2013 17:00:59 with gcc 4.6.3 *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be removed in a future release. Please use avconv instead. Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 90000.00 (180000/2) Input #0, mpegts, from 'a.mpg': Duration: (...)
• 17:16
  Encode a movie with Unicode filename in Windows using Popen - Tetsu Newest 'ffmpeg' Questions - Stack Overflow
  I want to encode a movie through IO.popen by ruby(1.9.3) in windows 7. If the file name contains only ascii strings, encoding proceed normally. But with unicode filename the script returns "No such file or directory" error. Like following code. #-*- encoding: utf-8 -*- command = "ffmpeg -i ü.rm" IO.popen(command)|pipe| pipe.each|line| p line I couldn't find whether the problem causes by ffmpeg or ruby. How can fix this problem?
• 18:09
  For WMV files avformat_find_stream_info() shows "Extra data: 8 bits left, value: 0" message - Mike Newest 'ffmpeg' Questions - Stack Overflow
  When I call avformat_find_stream_info() for wmv files, the following message is always seen: [wmv3 00FAEAE0] Extra data: 8 bits left, value: 0 After that the program works as expected but anyway I would like to know what does that message mean? Thank you! File info (by ffmpeg -i): Duration: 00:00:06.92, start: 0.000000, bitrate: 1514 kb/s Stream #0:0(rus): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp, 128 kb/s Stream #0:1(rus): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 720x576, 1368 kb/s, SAR 16:15 DAR 4:3, 25 tbr, 1k tbn, 1k tbc Code: AVFormatContext* pFormatCtx = (...)
• 15:45
  Screenshot of the Nexus One from adb? - Marcus Newest 'ffmpeg' Questions - Stack Overflow
  My goal is to be able to type a one word command and get a screenshot from a rooted Nexus One attached by USB. So far, I can get the framebuffer which I believe is a 32bit xRGB888 raw image by pulling it like this: adb pull /dev/graphics/fb0 fb0 From there though, I'm having a hard time getting it converted to a png. I'm trying with ffmpeg like this: ffmpeg -vframes 1 -vcodec rawvideo -f rawvideo -pix_fmt rgb8888 -s 480x800 -i fb0 -f image2 -vcodec png image.png That creates a lovely purple image that has parts that vaguely resemble the screen, but it's by no means a clean (...)
• 16:33
  Rendering video streaming in android sdl? or? - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  I've successfully cross-compiled a c++ video streaming library to the android ICS platform This library contains a sample player that uses sdl library to render the resulting decoded video streams and libav for decoding that i've also succeeded to cross compile(libav ... classes) Then, i 've made the necessary jni classes and tested it using log tags it seems that everything is fine but now i want to show the result on the screen(show the real streaming not just log messages) I am searching for the easiest way to render my stream (just to be sure that everything works fine) (...)
• 07:55
  On playback/Jump to perticular serction my video starts from begining - user2232325 Newest 'ffmpeg' Questions - Stack Overflow
  I have installed ffmpeg and mplayer to my server . Videos are running now ,But when I jump to particular section it start playing from the beginning . Is there any issue with the installation of mplayer or ffmpeg?
• 10:17
  FFmpeg converted mp4 file fails to load in Quicktime - wonea Newest 'ffmpeg' Questions - Stack Overflow
  I've been using FFmpeg to convert a movie I need to play in MP4, however in Quicktime the following error is presented; (Error -2041: an invalid sample description was found in the movie (output.mp4)). I used the following FFmpeg command parameters to convert the file; C:\\Temp\\EOBTemp>ffmpeg -i input.mp4 -y -acodec libmp3lame -ab 96k -vcodec libx264 -vpre lossless_slow -crf 22 -threads 0 output.mp4 Now this file plays absolutely fine, in Windows Media Player, and VideoLAN (FFmpeg based, so no surprise here. I using the latest build from HawkEye's FFmpeg Windows Builds (...) -- HawkEye's FFmpeg Windows Builds
• 09:11
  ffmpeg metadata, multiline text into comment field - decss Newest 'ffmpeg' Questions - Stack Overflow
  my question is next: i use ffmpeg to update metadata tags like this way ffmpeg -i "in.m4a" -acodec copy -metadata artist="artist text" -metadata comment="comment text" "out.m4a" Well, "artist text" and "comment text" is usual plain text, but comment field allow to put multiline text. Each line must have new line character to do it. Something like this: -metadata comment="source: lastfm \\r\\n tags: tag1, tag2 \\r\\n ..." But all characters that i use (\\r\\n, %nl%, ^N) brings no result So i have no idea how to put multiline text into a comment field via ffmpeg Hope you will help me : ) (...)
• 04:58
  how do i create a stereo mp3 file with latest version of ffmpeg? - Sean Newest 'ffmpeg' Questions - Stack Overflow
  I'm updating my code from the older version of ffmpeg (53) to the newer (54/55). Code that did work has now been deprecated or removed so i'm having problems updating it. Previously I could create a stereo MP3 file using a sample format called: SAMPLE_FMT_S16 That matched up perfectly with my source stream. This has now been replace with AV_SAMPLE_FMT_S16 Which works fine for mono recordings but when I try to create a stereo MP3 file it bugs out at avcodec_open2 with: "Specified sample_fmt is not supported." Through trial and error I've found that using (...) -- http://hosting.ispyconnect.com/example.mp3
• 06:35
  FFDEC_H264 dropping non-key frames - Kranti Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a sample GStreamer application to play MPEG2TS Video. My pipeline is: appsrc ! h264parse ! ffdec_h264 ! ffmpegcolorspace ! ximagesink If I pump the data without setting any timestamp, all the frames are getting played videoBuffer = gst_app_buffer_new (rawVideo, bufSize, test_free_video, rawVideo); But if I set the timestamp to the buffer, only I-frames are getting played: videoBuffer = gst_app_buffer_new (rawVideo, bufSize, test_free_video, rawVideo); GST_BUFFER_TIMESTAMP(videoBuffer) = calc_timestamp(rawVideo); calc_timestamp() is a function to calculate timestamp (...)

14 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 21:57
  Not able to read audio streams with ffmpeg - talhamalik22 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to solve a big problem but stuck with very small issue. I am trying to read audio streams inside a video file with the help of ffmpeg but the loop that should traverse the whole file of streams only runs couple of times. Can not figure out what is the issue as others have used it very similarly. Following is my code please check: JNIEXPORT jint JNICALL Java_ru_dzakhov_ffmpeg_test_MainActivity_logFileInfo (JNIEnv * env, jobject this, jstring filename ) AVFormatContext *pFormatCtx; int i,j,k, videoStream, audioStream; AVCodecContext *pCodecCtx; AVCodec *pCodec; AVFrame *pFrame; (...)
• 17:19
  FFmpeg on windows 7, encode video in mp4 for HTML 5 video fail - manonthemoon Newest 'ffmpeg' Questions - Stack Overflow
  I try to encode my video with FFmpeg, to convert to mp4. But the video doesn't work on html 5. I don't understand why. I found this command on the web and I tried it: ffmpeg.exe -i wildlife.wmv -b 1500k -vpre slow -vpre baseline -vcode libx264 \\ -g 30 wildlife.mp4 But it fails, and I have this error : File for preset 'slow' not found I check the folder "presets" and the preset is on the folder, so I don't understand why it's telling me this error. I tried with the complete path, it fails (...)
• 17:01
  overlay and combine ffmpeg at once - müngi Newest 'ffmpeg' Questions - Stack Overflow
  Initial situation video1, h264 (but the codec isn't actually important I guess), duration 10 seconds, non-transparent video2, flv, duration 10 seconds, transparency Using video1 as "starting", "background" clip. then after second 5 i'd like to overlay video2 on it. Resulting in a 15 seconds clip. let me explain it more graphically video1: 111111111111111111 video2: 222222222222222222 result: 111111111333333333222222222 Using the ffmpeg overlay filter like this ffmpeg -i K00187_KOMIKER_NIAVARANI_MICHAEL_01.mp4 -i alpha_vid.flv \\ -filter_complex "overlay" test.mp4 Of course this (...)
• 01:52
  How to upgrade ffmpeg to the latest version [closed] - user1503606 Newest 'ffmpeg' Questions - Stack Overflow
  I am looking to upgrade ffmpeg to the latest version if i run yum install ffmpeg ffmpeg-devel I get the following Setting up Install Process Package ffmpeg-0.6.5-1.el5.rf.x86_64 already installed and latest version Package ffmpeg-devel-0.6.5-1.el5.rf.x86_64 already installed and latest version Nothing to do Then if i run ffmpeg -i P1010989.MOV -vcodec copy -acodec aac -strict -2 -b:a 384k ouet.mp4 FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers built on Jan 29 2012 23:55:02 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51) configuration: --prefix=/usr --libdir=/usr/lib64 (...)
• 19:04
  Resolving rtmp stream url from Adobe Flash container - Mustafe Newest 'ffmpeg' Questions - Stack Overflow
  How can a rtmp stream url be retrieved completely with its playpath and be played with ffplay/avconv from a flash plugin. In embedded flash code below rtmp address exits (rtmp://live.atv.com.tr/atv) , however it does not work with avplay since it needs playpath. ","schedule":["zone":"5","position":"pre-roll","server":"type":"direct","apiAddress":"http%3a%2f%2fad.reklamport.com%2frpgetad.ashx%3ftt%3dt_atv_canli_yayin_preroll_800x700%26vast%3d2"],"playerId":"live","playlist":["eventCategory":"Canli Yayin","url":"atv3","live":true,"provider":"influxis"]" name="flashvars"> Problem Solved: (...)
• 17:48
  How to reduce size of moov atom of H.264 movies to improve streaming start for smartphones? - alebedev Newest 'ffmpeg' Questions - Stack Overflow
  We run a video service streaming movies to smartphones (iOS&Android). We are encoding in H.264+AAC and using the mp4 container. We have a problem that long movies (60 minutes+) take a very long time to start playing and have tracked this down to the large size of moov atom for these movies. For 110 minute movies the atom is as large as 4.2Mb which obviously takes a long time to download to a smart-phone over 3G! Is there anyway to make the moov atom smaller? We can reduce it bit by dropping the audio sampling rate, but obviously anything below 22kHz would not really be acceptable. (...)
• 07:50
  Windows Batch Script For loop - Dobbo1989 Newest 'ffmpeg' Questions - Stack Overflow
  I am new to batch scripts, I am trying to figure out how to create a script that will take all video files in a folder videos\\*.* and then use ffmpeg on each one and output the files to converted\\*.mp4 where the filenames are the same. However I cant figure out how to get the for loop working so that I can extract the name and extension type of file I am processing. for %%f IN (videos\\*.*) DO (convert.bat %%f) convert.bat ffmpeg.exe -i %1 -f mp4 converted\\%~n.mp4 I have tried both with and without double quotes however it wont recognise the (...)

13 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 21:36
  Installing codecs for mov to mp4 conversion ffmpeg [closed] - user1503606 Newest 'ffmpeg' Questions - Stack Overflow
  I have been trying to convert a .mov file to a .mp4 file for a while now i think this is the correct code to do it. ffmpeg -i P1010989.MOV -vcodec copy -acodec copy out.mp4 But here is my output FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers built on Jan 29 2012 23:55:02 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 (...)
• 16:39
  Rendering video stream in android sdl? or? - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  I've successfully cross-compiled a c++ video streaming library to the android ICS platform This library contains a sample player that uses sdl library to render the resulting decoded video streams and libav for decoding that i've also succeeded to cross compile(libav ... classes) Then, i 've made the necessary jni classes and tested it using log tags it seems that everything is fine but now i want to show the result on the screen(show the real streaming not just log messages) I am searching for the easiest way to render my stream (just to be sure that everything works fine) (...)
• 19:06
  rtp mpg stream using jrtplib occurred error "illegal timestamp unit" - socket Newest 'ffmpeg' Questions - Stack Overflow
  I wanna code rtp video stream sender and use VLC to play it in the LAN. I just have a mpeg4 file "a.mpg". And in my opinion, jrtplib can pack the packed well, so I think I can use sendPacket() function directly to send the mpg file. code below: #include #include #include #include #include #include #include #include #include using namespace jrtplib; using namespace std; int main() RTPSession s; RTPSessionParams sparam; s.SetTimestampUnit(160.0/104857.0);//~ RTPUDPv4TransmissionParams tparam; tparam.SetPortbase(9000); int status=s.Create(sparam,&tparam); if(status Then, I compile it: (...)
• 17:54
  Receive rtp (opus) stream from ffmpeg on other computer with VLC - Friendlyghost89 Newest 'ffmpeg' Questions - Stack Overflow
  I am currently trying to get an opus stream to play on a separate computer using VLC. Currently the setup is as follows: Odroid-U2 running ffmpeg to capture audio and send as rtp opus stream to remote computer.... command used: ffmpeg -f alsa -ac 1 -i hw:0 -acodec libopus -ab 32k -ac 1 -f rtp rtp://192.168.0.115:2032 the remote computer (on same local network) is at 192.168.0.115 the Odroid is at 192.168.0.124 If i use libmp3lame in libopus's place then the stream will run through without a problem and will not prompt the fact that it requires sdp.... VLC output on remote (...)
• 07:56
  Rendering libav-decoded video stream in android sdl? or? - user1568549 Newest 'ffmpeg' Questions - Stack Overflow
  I've successfully cross-compiled a c++ video streaming library to the android ICS platform This library contains a sample player that uses sdl library to render the resulting decoded video streams and libav for decoding that i've also succeeded to cross compile(libav ... classes) Then, i 've made the necessary jni classes and tested it using log tags it seems that everything is fine but now i want to show the result on the screen(show the real streaming not just log messages) I am searching for the easiest way to render my stream (just to be sure that everything works fine) (...)
• 07:42
  Resize to a specific width and height using ffmpeg - Lambda Dusk Newest 'ffmpeg' Questions - Stack Overflow
  I need to generate thumbnails for videos, automatically. I cannot predict the format of the video, but I need the thumbnail to be 220x120 pixels, always. Using -s 220x120 produces a weird stretch, just like -vf "scale=220:120". I'd like the stretching to be uniform, either cutting away top and bottom if the video is too high or adding black borders.
• 05:20
  avcodec symbols not found - seereen Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to build the example code in FFMPEG library I add the libavcode.h , libavcode.a in my project and I set the header search usr/local/include and the library search to usr/local/lib when I compile the example I got this errors ... ( all of them related to avcodec library) Undefined symbols: "avcodec_find_encoder(CodecID)", referenced from: video_encode_example(char const*, CodecID)in main.o "avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)", referenced from: video_encode_example(char const*, CodecID)in main.o video_decode_example(char const*, char const*)in main.o (...)
• 02:16
  ffmpeg + x264 in Android, undefined reference to several functions - user1914692 Newest 'ffmpeg' Questions - Stack Overflow
  I was trying to use the halfninja's tutorial to get the library for Android. However, it has error: error: ERROR: libx264 not found After painful searching, I found that Panayiotis Karabassis's configuration works. for x264 configuration, we need to add: --enable-static \\ for ffmpeg configuration, --ld=arm-linux-androideabi-gcc \\ --extra-libs="-lgcc" I do not know why we should use ld=arm-linux-androideabi-gcc, rather than ld=arm-linux-androideabi-ld. But if we use ld=arm-linux-androideabi-ld, the compiling will not work. Anyway, now I get libvideokit.so I put it in the jni (...) -- halfninja's tutorial

12 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 09:47
  Transcoding FLV to MP4 with ffmpeg very slow - bhu Boue vidya Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to support the recording of webcam video on our website, which I then need to transcode to MP4 and WebM to support HTML5 playback. I have ffmpeg 1.2 installed on our server, and have the whole process running fairly well. The one problem I do have though is transcoding FLV to MP4. it is unacceptably slow, e.g. an 8 second FLV takes about 2.5 mins to transcode! The ffmpeg command I am using is: ffmpeg -y -i webcam.flv -c:a libfaac -ac 2 -b:a 64k -ar 44100 -c:v libx264 \\ -b:v 350k webcam.mp4 There are so many ffmpeg params, I am a bit lost as to the best way forward with this (...) -- dropbox.com/s/hhd6uhdiuhk800w/webcam.flv
• 23:22
  Non monotonically increasing dts to muxer in stream 1 [closed] - Bill Humpton Newest 'ffmpeg' Questions - Stack Overflow
  I have an error with 1gb videofile and avconv Application provided invalid, non monotonically increasing dts to muxer in stream 1: 177873 >= 177849 av_interleaved_write_frame(): Invalid argument I use avconv -i /root/video/112-1.wmv -y -strict experimental -b:v 1800K -ss 00:00:10 -c:v libx264 -c:a libfaac -ar 44100 -ac 1 -b:a 128k -threads 0 -maxrate 1850k -bufsize 1000k -vf "scale=w=1280:h=720, drawtext=fontfile=FreeSans.ttf:text='site.com':fontcolor=whiteⓐ1.0:fontsize=20:x=1130:y=695" /root/converted/112-1.wmv Here is my log http://pastebin.com/BwBmVMDs I tried to suppress (...) -- http://pastebin.com/BwBmVMDs
• 21:18
  using ffmpeg exe in php - Bruno Ribeiro Newest 'ffmpeg' Questions - Stack Overflow
  and am wanting to use ffmpeg as command line direct on windows 7 x64, I tried adding the extension, but unfortunately it did not work for some unknown reason, but the executable worked perfectly, I'm using the exec command, the only problem is that does not work with direct lines, I have to create a file. bat to run the program. this is my doubt. $a = exec('\\b.bat'); if ($a) echo "Success"."\\n"; print $a; else echo "No good"."\\n"; print $a; b.bat ffmpeg -i video.flv -an -ss 00:00:16 -an -r 1 -vframes 1 -y %a.jpg already tried several alternatives but the only one that (...)
• 23:03
  qt-faststart command never finish - Positive Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use qt-faststart on MP4 videos to make the streaming fast but the qt-faststart command is never get finish, It is running from the last one and half hour and video file is of 14MB only. qt-faststart file.mp4 newfile.mp4 The command is showing the ftyp and free as output the output look like this and it is keep repeating these lines and increasing the number ftyp 2324322 32 free 2324456 8 and the number is keep increasing with the output. No error is shown. The MP4 video is converted from FLV video using the FFMPEG. Generally it show the output like this but with my (...)
• 23:35
  Node.JS: FFmpeg piped video encoding no thumbnail created - Sascha Heim Newest 'ffmpeg' Questions - Stack Overflow
  I want to pipe the video during upload to ffmpeg for realtime thumbnail creation. All went fine but no thumbnail.jpg was created and the ffmpeg stderr hangs after the libraries version display. Updated: Ive updated my code but it also doesnt create a valid thumbnail. var formidable = require('formidable'), http = require('http'), sys = require('sys'), spawn = require('child_process').spawn; function spawnFfmpeg(exitCallback) var args = ['-i', 'pipe:0', '-c:v', 'mjpeg', '-ss', '00:00:13', '-vframes', (...)
• 08:30
  how to compile the latest ffmpeg into a lib that can be used in my windows application [closed] - chinayin Newest 'ffmpeg' Questions - Stack Overflow
  i download the latest ffmpeg ,then in windows i used the mingw+msys to compiled it to a lib ,but the source code had so many .h,.cpp ,i don't know how to use the lib in my windows application . when i compiled my windows application it always come with an error can not find xxx .h and so on .so if someone who can tell me that how to make a lib and use it in my windows application.i am a new one in ffmpeg ,this problem make me feel so bad. so i come here for an answer . thank you very much . best (...)
• 14:04
  Re streaming an rtsp stream from an ONVIF camera - user132151 Newest 'ffmpeg' Questions - Stack Overflow
  I would like to take the video stream from my ONVIF TI camera and add audio to the Moët stream. So I have the camera and I have a beagle board xm . On the beagle board I would like to suck in the h.264 rtsp stream, then I want to take the audio in from the beagle board and make 1 mpeg stream with audio and video. So I think I could do it with gstreamer, since you seem to be able to do everything audio video with gstreamer. But I'm a gstreamer virgin. But I'm not wedded to gstreamer I have a feeling you could probably do it in ffmpeg as well. But I would appreciate any help at all, (...)
• 13:53
  IE9+ not playing portait video in HTML5 video tag - ptrn Newest 'ffmpeg' Questions - Stack Overflow
  For some reason I can't get IE9/10 to play video that is taller than wide, when using HTML5 video tags. Demo: http://s.l6.no/demo/video+html5/ The demo shows one video scaled down from 1280x720, which plays perfectly fine in all tested browsers, and one video scaled down from 720x1280 which plays for all browsers but IE9/10. Tested and works for: Chrome 26, Windows 7 64-bit Chromium 24, Ubuntu 64-bit Firefox 14, Windows 7 64-bit Tested and does not work for: Internet Explorer 9, Windows 7 64-bit Internet Explorer 10, Windows 7 64-bit I'm using FFmpeg to code the videos to (...) -- http://s.l6.no/demo/video+html5/
• 11:12
  How to merge an image in audio file - vijay Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to merge thumbnail size image(104x80) into audio file format(m4a) and should be play in jw player, but the jw player doesnt support it... I have tried in Vlc player,but the image size gets blurred and upscaled.. I am using the following command ffmpeg -i image8.jpg -i file.m4a -acodec copy test.mp4 but it doesnt support in jw player and whem am playing in vlc player,image gets upscaled can u please tell me how to merge thumbnail size image in jw player and not to upscale an image size........ i had attached command line output in below link ,pl find it (...)
• 09:20
  Using OpenCV 2.4.4 with FFmpeg in Windows - aardvarkk Newest 'ffmpeg' Questions - Stack Overflow
  I know there are other questions dealing with FFmpeg usage in OpenCV, but most of them appear to be outdated. By opening up the makefiles in CMake, I can verify that I've got the WITH_FFMPEG flag on. My output folder for the OpenCV build contains a bin folder, within which are Debug and Release folders, each containing a copy of a .dll file entitled opencv_ffmpeg244.dll. I can step into the source code of OpenCV when I create a VideoWriter and verify that the function pointers to the .dll get filled correctly. That much appears to be working. If I use the FOURCC code of (...)
• 07:35
  Can ffmpeg extract closed caption data - spinon Newest 'ffmpeg' Questions - Stack Overflow
  I am currently using ffmpeg to convert videos in various formats to flv files. One request has also come up and that is to get closed caption info out o the file as well. Does anyone have any experience with this or know it can even be done. I don't see any options for it but thought I would ask and see.
• 07:28
  FFMPEG loop video overlay - x1886x Newest 'ffmpeg' Questions - Stack Overflow
  I have two videos, one of which is overlaid onto the other.The one that is overlaid is only a few seconds long, and I want it to keep looping whilst the main video plays. Ive tried everything I can think of , but nothing seems to work in ffmpeg ffmpeg -i mainVideo.MTS -vf " movie=overlaid.wmv [overlay];[in][overlay] overlay=1000:500 [out]" output.mp4 overlays one on top of the other , but with no looping. Changing movie=overlaid.wmv to movie=overlaid.wmv:loop=0 gives me an error message [movie ⓐ 01B19FC0] Key 'loop' not found. [movie ⓐ 01B19F40] Error parsing options string: (...) -- ffmpeg docs
• 08:42
  How to use avconv filters after encoding? - Bill Humpton Newest 'ffmpeg' Questions - Stack Overflow
  I have avconv command avconv -i file -s [new size options] -vf "[filters]" /root/converted/1.mp4 Avconv use filters before encoding, but I need after. I need one avconv command: Resize video first Use filters second How can I do it?
• 08:24
  The best way to use ffmpeg/libavfilter to do Overlay - user2273060 Newest 'ffmpeg' Questions - Stack Overflow
  I want to use libavfilter to do special effect processing to achieve two videos overlay; I try to do this: AVFilterGraph 1: video1_frame -> buffer -> ...... -> sink -> out_video1_frame; AVFilterGraph 2: video2_frame -> buffer -> ...... -> sink -> out_video2_frame; AVFilterGraph 3: (out_video1_frame + out_video2_frame) ->buffer -> overlay -> sink -> final_video_frame; On fmpeg website, ffmpeg/libavfilter supports multiple input and output. So I suppose that there is a better way to do the overlay, just like use one AVFilterGraph: (video1_frame + video2_frame) -> buffer -> ..... overlay -> (...)
• 08:12
  How to change mp3 bitrate in android? - Doãn Thiên Sầu Newest 'ffmpeg' Questions - Stack Overflow
  I have a problem that need your help: In my project, I have a mp3 file with 320kps (it's big size). So how can I change its bitrate to lower (about 80kps). I know a library to do this, it's ffmpeg. But to use this library very complex in Android. My question is " is there another way to change mp3 bitrate that not use ffmpeg in Android ". Thank you for your help!
• 00:27
  ffmpeg: Stream, record and play my webcam - ChristophLSA Newest 'ffmpeg' Questions - Stack Overflow
  I want to stream my webcam to a rtmp server. Also I want to record and save this to a local file (with better settings). This works and the command look like this: ffmpeg -f video4linux2 -i /dev/video2 -f pulse -i default \\ -r 20 -acodec copy -vcodec libx264 -threads 0 -s 720x480 recording-$(date +%d.%m.%Y-%H.%M.%S).mkv \\ -acodec libmp3lame -ab 64k -ar 44100 -vcodec libx264 -vpre my_ffpreset -threads 0 -f flv -s 320x240 rtmp://foo/bar Now I want to play my webcam to test the right angle, audio volume etc. What is the best way for doing this without a third (expensive) encoding? I could (...)

11 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 16:07
  add an image into audio file [closed] - vijay Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to merge small size image into audio file format(m4a), but while playing the image gets blurred as the merged image was smaller than the player size. I am using the following command ffmpeg -i image8.jpg -i file.m4a -acodec copy test.mp4 can u please tell me how to display small size image in audio file
• 21:50
  FFMPEG multiple file encoding strategy - Craig Lillard Newest 'ffmpeg' Questions - Stack Overflow
  We went from encoding 1 flv preview file to: 1 640X480 webm file watermarked (using 2 pass) 1 640X480 mp4 file watermarked 1 400X224 webm file watermarked (using 2 pass) 1 400X224 mp4 file watermarked This is from an original unwatermarked 1920X1080 file. This new encoding process has greatly slowed down encoding productivity. If you had to speed up this process and still maintain quality, what would you ffmpeg gurus do? Some of the options we have thought of are: Use 1 pass webm encoding instead of 2 pass Pre-downsizing the 1920X1080 video file using a faster encoding method to the (...)
• 19:38
  FFMPEG: extracting jpegs at 1 fps rate with "-r 1" or "vf fps=fps=1" causes first three frames to be wrong [closed] - Stefan Newest 'ffmpeg' Questions - Stack Overflow
  I need to use ffmpeg to extract video stills from a video, one picture per second, starting with second 0. I created a 4min test video with a running timecode (25fps, starting with 00:00:00 running to 03:59:24) If I use either ffmpeg -i input.mp4 -f image2 -r 1 still-%d.jpeg or ffmpeg -i input.mp4 -f image2 -vf fps="fps=1" still-%d.jpeg I fail because the first three images do not display expected time codes 00:00:00, 00:01:00, 00:02:00, but 00:00:00, 00:00:01, 00:00:13, and all subsequent images show having frame 13 in their timecode (and not :00). This causes my video preview to be (...)
• 17:17
  transcoding flv to mp4 with ffmpeg very slow - bhu Boue vidya Newest 'ffmpeg' Questions - Stack Overflow
  i am trying to support the recording of webcam video on our website, which i then need to transcode to mp4 and webm to support html5 playback. i have ffmpeg 1.2 installed on our server, and have the whole process running fairly well. the one problem i do have though is transcoding flv to mp4. it is unacceptably slow. eg, an 8 second flv takes about 2.5 mins to transcode! the ffmpeg cmdline i am using is: ffmpeg -y -i webcam.flv -c:a libfaac -ac 2 -b:a 64k -ar 44100 -c:v libx264 -b:v 350k webcam.mp4 there are so many ffmpeg params, i am a bit lost as to the best way forward with this (...) -- https://www.dropbox.com/s/hhd6uhdiuhk800w/webcam.flv
• 15:25
  convert h.264 avi container to mp4 with ffmpeg - Tom Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to convert my h.264 avi container to a mp4 container with ffmpeg. I've found this works: ./ffmpeg -i myfile.avi -vcodec copy myfile.mp4 ffmpeg version N-51169-gcedf276 Copyright (c) 2000-2013 the FFmpeg developers built on Mar 21 2013 05:12:00 with gcc 4.6 (Debian 4.6.3-1) configuration: --prefix=/root/ffmpeg-static/32bit --arch=x86_32 --extra-cflags='-m32 -I/root/ffmpeg-static/32bit/include -static' --extra-ldflags='-m32 -L/root/ffmpeg-static/32bit/lib -static' --extra-libs='-lxml2 -lexpat -lfreetype' --enable-static --disable-shared (...)
• 15:27
  How to show the camera preview always in the Spydroid-ffmpeg project - user2182013 Newest 'ffmpeg' Questions - Stack Overflow
  I'm tring to readapt the https://github.com/vanevery/spyd-ffmpeg project to my own. This project streams the video and/or audio captured by the phone camera via rtsp and it can be received in a computer or so running vlc or similar. My problem is that the app just shows the preview of the camera when receives a connection, but I'd like to show it always. I've tried hundred of things but it always crashes. I cannot find any startPreview() or similar method and I don't know where exactly in the code it is started in order to modify it. Any clue? (...) -- https://github.com/vanevery/spyd-ffmpeg
• 11:38
  FFMPEG - Read video file and convert to Bitmap - user1573610 Newest 'ffmpeg' Questions - Stack Overflow
  I can successfully read a video file using ffmpeg Now i want to show these video frames on my MFC mdi. For that i need a bitmap to feed my CBitmap::FromHandle() function memDC.CreateCompatibleDC(dc); CBitmap * bmp = CBitmap::FromHandle(); CBitmap * oldBmp = memDC.SelectObject(bmp); dc->BitBlt(0,0,320,240,&memDC,0,0,SRCCOPY); For ffmpeg i am using dranger tutorial 01 http://dranger.com/ffmpeg/tutorial01.html Please advise how to convert frames to Bitmap (...) -- http://dranger.com/ffmpeg/tutorial01.html
• 12:20
  convert mp3 to wav using xuggle getting exception - Felix Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert mp3 to wav and the code is here: String mp3 = "F:\\\\work\\\\pic2talk38512.mp3"; String wav = "F:\\\\work\\\\pic2talk38512.wav"; TranscodeAudioAndVideo.transcodeTest(mp3, wav); public static void transcode(String sourceUrl, String destinationUrl) IMediaReader reader = ToolFactory.makeReader(sourceUrl); reader.addListener(ToolFactory.makeWriter(destinationUrl, reader)); while (reader.readPacket() == null) do while (false); I got this exception: java.lang.UnsupportedOperationException: could not guess codec at (...)
• 08:16
  build an encoder on android(FFMPEG) - Jason Tsai Newest 'ffmpeg' Questions - Stack Overflow
  I need to build an encoder on android. Trying to encode the video stream captured by camera to h.264. I've got the libffmpeg.so file, but I don't know how to use it. I'm new on this. Could anyone give some suggestions?
• 09:25
  convert flv video file to m3u8 format with h264 and aac codec in ffmpeg - user2138489 Newest 'ffmpeg' Questions - Stack Overflow
  I want to convert a flv video file to a m3u8 container using AAC and H264 encoding in FFmpeg version 0.7.15. Can anyone help me on this? I used this command to convert to the m3u8 format, but it throws an error: cmd: ffmpeg -i sample.flv -b 1104k -s 320x240 -vcodec libx264 -ab 32 -ar 24000 -acodec libfaac final_video.m3u8 Error: ffmpeg version 0.7.15, Copyright (c) 2000-2013 the FFmpeg developers built on Feb 22 2013 07:22:31 with gcc 4.4.5 configuration: --enable-libdc1394 --prefix=/usr --extra-cflags='-Wall -g ' --cc='ccache cc' --enable-shared --enable-libmp3lame (...)
• 10:28
  How to reduce the frame-rate programmatically with FFMPEG - stackr Newest 'ffmpeg' Questions - Stack Overflow
  I'm looking for a way, or the best way, to get a high-frame-rate movie in a stream (http or rtsp) to run smooth on my (in my case) iPhone app. The normal frame-rate movies run smooth (approx. 30fps), but want special high frame rate movies to also run smooth. The way i was thinking was dropping frames when there is not enough time to process the frames. Or is there perhaps another way? Can anybody point me in the right direction of fixing this, or perhaps supply me some samples? I use FFMPEG, so there must be some experts (...)
• 09:28
  FFMPEG fails to find any files matching the regexp - dawe134 Newest 'ffmpeg' Questions - Stack Overflow
  I want to convert sequence of 40 images to a video. The problem is that ffmpeg could not find any of the inputs images matching the regexp in the command. What am I doing wrong please? I ran the following commands: > ffmpeg -f image2 -i "img%0d.jpg" -vcodec mpeg4 -y -v "verbose" 07_seq_wire.avi *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be removed in a future release. Please use avconv instead. img%0d.jpg: No such file or directory > ls -l -rw-r--r-- 1 david david 69812 Apr 11 01:54 img01.jpg -rw-r--r-- 1 david david 70858 Apr 11 01:54 (...)
• 02:52
  How to use FFMPEG to play H.264 stream from NAL units that are stored as video AVPackets - Sapphire Newest 'ffmpeg' Questions - Stack Overflow
  I am writing client-server system that uses FFMPEG library to parse H.264 stream into NAL units on the server side, then uses channel coding to send them over network to client side, where my application must be able to play video. The question is how to play received AVPackets (NAL units) in my application as video stream. I have found this tutorial helpful and used it as base for both server and client side. Some sample code or resource related to playing video not from file, but from data inside program using FFMPEG library would be very helpful. I am sure that received information (...) -- this tutorial

10 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 14:56
  ffmpeg wav audio convert fails [closed] - Jizbo Jonez Newest 'ffmpeg' Questions - Stack Overflow
  So I am running the following command # ffmpeg -y -i /var/www/vhosts/test.net/httpdocs/dd.avi -ar 44.1k -ac 2 /var/www/vhosts/test.net/httpdocs/dd3.avi but get the following error ffmpeg version N-43171-ga763caf Copyright (c) 2000-2012 the FFmpeg developers built on Aug 3 2012 07:56:19 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-52) configuration: --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvpx --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-pic --enable-libx264 --enable-libxvid --disable-ffplay --enable-shared (...)
• 21:15
  ffmpeg convert side by side into 3d interlaced video [closed] - user2267607 Newest 'ffmpeg' Questions - Stack Overflow
  Hi Im wondering that since ffmpeg offers a vast array of filter options whether there is an option to convert a left and right eye view (stereoscopic) video into a 3d interlaced format.
• 21:51
  ffmpeg how to control fps tbr tbn tbc parameters - kaka_ace Newest 'ffmpeg' Questions - Stack Overflow
  RT, i have two avi file, A.avi: fps 30 tbr 30 tbn 30 tbc 30. B.avi: fps 2 tbr 2 tbn 2 tbc 2. the problem is how to set the same value 30 on B.avi?
• 20:03
  image to video conversion with transition effect - Narendra DroidWorm Newest 'ffmpeg' Questions - Stack Overflow
  I am successfully able to convert a sequence of images into a video referring the link https://github.com/guardianproject/SSCVideoProto. But now my requirement is to put some transition effects like fade in / fade out to be shown in video with the change of every image. Is it possible to do using FFMPEG or should I use something else for that? Please direct me. -- https://github.com/guardianproject/SSCVideoProto
• 17:40
  Incorrect frame rate in video (Xuggler + MPEG 4 + H.264) - Vladislav Bauer Newest 'ffmpeg' Questions - Stack Overflow
  I have a problem with incorrect value of frame rate in output file, after converting. I made a really simple example to describe a problem: public static void main(String[] args) // reader IMediaReader reader = ToolFactory.makeReader("/tmp/1/i3.avi"); IMediaWriter writer = ToolFactory.makeWriter("/tmp/1/o3.mp4", reader); reader.addListener(writer); while (true) try final IError error = reader.readPacket(); if(error != null) System.err.println("Error decoding packet " + error.getDescription()); if (!reader.isOpen()) break; catch (final Exception ex) System.err.println("Error (...)
• 14:07
  error convert sample rate from AV_SAMPLE_FMT_FLTP to AV_SAMPLE_FMT_S16 - user1881371 Newest 'ffmpeg' Questions - Stack Overflow
  convert sample rate from AV_SAMPLE_FMT_FLTP to AV_SAMPLE_FMT_S16 and play the openAL, get the following error(http://joxi.ru/B_JkUdg5CbDrWhe9oNI) CONV_FUNC (AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16 (lrintf (* (const float *) pi * (1 in file audioconvert.c my code swrContext = swr_alloc(); av_opt_set_int(swrContext, "in_channel_layout", cc->channel_layout, 0); av_opt_set_int(swrContext, "out_channel_layout", cc->channel_layout, 0); av_opt_set_int(swrContext, "in_sample_rate", cc->sample_rate, 0); av_opt_set_int(swrContext, "out_sample_rate", cc->sample_rate, 0); (...) -- http://joxi.ru/B_JkUdg5CbDrWhe9oNI
• 15:45
  How to encode with ffmpeg if number of images smaller than GOP size - theateist Newest 'ffmpeg' Questions - Stack Overflow
  The code bellow creates mp4 video file from jpeg images. When number of images is greater than GOP size the encoding success and after 10th image gotPacket that returned by avcodec_encode_video2 is > 0. BUT when number of images is smaller than GOP size gotPacket is always = 0 and therefore no images written to the file. My guess is that avcodec_encode_video2 allocates buffer with length equals to GOP size and until it won't be full gotPacket will be 0. My question is how to force avcodec_encode_video2 to encode even if it's buffer is not full? ... _outStream->codec.gop_size = (...)
• 16:12
  How to convert my 16:9 size MKV video to 4:3 size AVI video file - Bimal Rekhadiya Newest 'ffmpeg' Questions - Stack Overflow
  I have a video in MKV format and it's size is 720x304 (16:9 ratio) size video. I want to convert it to AVI format (using xvid video codec). The output file size should be 480x360 (4:3 ratio) and also want to keep the original (16:9) ratio so it should be cinemascope (black areas at top and bottom). I am on Ubuntu Linux so I can use mencoder, avconv(ffmpeg) or any tool that work on Linux. I tried this command: avconv -i sample.mkv -vcodec libxvid -r 25 -b 1200 -aspect 4:3 -q 1 t.avi But the problem is that the video is stretched to 4:3 and I want to keep original video's ratio (...)
• 16:29
  Get frame from live video stream - rickster Newest 'ffmpeg' Questions - Stack Overflow
  I am streaming live video from my camera on my android phone to my computer using the MediaRecorder class. recorder.setCamera(mCamera); recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setOutputFile(uav_UDP_Client.pfd.getFileDescriptor()); recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); That's the basic idea. So I would like to show this stream in real time. My plan is to use FFMpeg to turn the latest frame into a .bmp and show the .bmp on my C# program every time there is a new frame. The (...)
• 10:31
  Videoediting SDK C# - user2265112 Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently working on a project were i have to collect a videostream from a videoserver. This is done by the videoservers SDK where i get a videoclip output. From this point i want to be able to cut at specific places in the videoclip or more specifically: trim out a specific part in the video. This will be done for three videoclips and then i want to combine these videos into one wide-screen split-screen videoclip. You should be able to see clip1,clip2,clip3 simultaneously in one frame. As of now i have a solution for this where i pass arguments to ffmpeg. This works but are (...)
• 09:32
  Join multiple flv with ffmpeg - user2060812 Newest 'ffmpeg' Questions - Stack Overflow
  i am trying to join two flv files using -concat option in ffmpeg-1.1 . I have created a list named mylist.txt and placed two flv files into it, but the problem i am facing is that the output of first file in mylist.txt streams perfect but video breaks into pieces when it comes to the second file. Looks like i am using the wrong options with -concat, please guide me for suitable commands with -concat option. Following are the commands and configurations i am using for transcoding .flv files:- mylist.txt file '/root/1.flv' file '/root/2.flv' ffmpeg command :- ffmpeg -re (...) -- http://pastebin.com/P3uaUDEd
• 03:40
  C++ FFMPEG not writing AVCC box information - awr Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to encode raw H264 into an mp4 container using the FFMPEG API in C++. It all works fine, however the AVCC box is empty, and it returns the error: [iso file] Box "avcC" size 8 invalid If I then use the command line tool on the output file: ffmpeg -i output.mp4 -vcodec copy fixed.mp4 The output file works and AVCC is populated with the required information. I'm at a loss as to why this command line argument works but I'm unable to produce the same result using the API. What I do in the C++ code (also do things in between the function calls): outputFormat_ = (...)
• 03:30
  ffprobe or avprove returning plain text errors in JSON output - Justin Jenkins Newest 'ffmpeg' Questions - Stack Overflow
  I'm running avprobe to get stream infomation about a video in JSON ... avprobe -loglevel quiet -show_format -show_streams file.m4v -of json This is basically the exact same thing as ffprobe or ffmpeg -i (and I get the same error.) ffprobe -loglevel quiet -show_format -show_streams file.m4v -print_format json The command works most of the time ... however, on occation I'll have a video that has an odd stream in it that is "unsupported" and I'll get back something like this (abbreviated.) Unsupported codec with id 94213 for input stream 2 "format" : "filename" : (...)
• 00:05
  iOS FFMPEG encode images to video - brad.roush Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to take a set of UIImages and create a video file out of them with FFMPEG. Seems there are lots of questions about this topic but non have been able to get this working correctly for me. This one was particularly helpful in giving me a starting point. This iFrameExtractor example was also very helpful but I want to do this in reverse, then add audio. This is the closest I have gotten and it creates a short silent video with flashing colors and no images: // Register all formats and codecs av_register_all(); AVCodec *codec; AVCodecContext *c= NULL; int i, out_size, size, (...) -- iFrameExtractor example
• 00:53
  FFMPEG: i need audio channels 7 & 8 to be the main audio track for a video - lo_fye Newest 'ffmpeg' Questions - Stack Overflow
  I have a video with 8 channels of audio. I need tracks 7 (Left Stereo) and 8 (Right Stereo) to be the audio for the video (which I'm converting to flv). I've tried playing with -filter_complex and the join, amix, and amerge filters, as well as the -map parameter, but I can't seem to find the right combination of values :-/ Output: /usr/local/bin/ffmpeg-1.0/bin/ffmpeg -i '/folder/video_name.mov' -f 'flv' \\ -s '320x240' -b '250k' -aspect '4:3' -ac 1 -ab '64k' -ar '22050' -y \\ /folder/video_name.flv ffmpeg version (...)

9 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:24
  FFmpeg drawtext - Could not load fontface from file [closed] - falek.marcin Newest 'ffmpeg' Questions - Stack Overflow
  I've try to add simple text on top of video with FFmpeg using drawtext parameter. Every time i'm going to do this, error is returned: Could not load fontface from file 'arial.ttf': cannot open resource To indicate the location of the font I used the following methods: ffmpeg -i C:\\Test\\rec\\vid_1321909320.avi -vf drawtext=fontfile=arial.ttf:text=test -sameq vid_1321909320.flv ffmpeg -i C:\\Test\\rec\\vid_1321909320.avi -vf drawtext=fontfile=C:\\Windows\\Fonts\\arial.ttf:text=test -sameq vid_1321909320.flv All have failed. Does anyone have experience with adding text using (...)
• 23:11
  How to convert sample rate from AV_SAMPLE_FMT_FLTP to AV_SAMPLE_FMT_S16? - frankish Newest 'ffmpeg' Questions - Stack Overflow
  I am decoding aac to pcm with ffmpeg with avcodec_decode_audio3. However it decodes into AV_SAMPLE_FMT_FLTP sample format (PCM 32bit Float Planar) and i need AV_SAMPLE_FMT_S16 (PCM 16 bit signed - S16LE). I know that ffmpeg can do this easily with -sample_fmt. I want to do the same with the code but i still couldn't figure it out. audio_resample did not work for: it fails with error message: .... conversion failed.
• 19:23
  ffmpeg to combine two mov files from iPhone - Jason Stallings Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to combine two videos recorded on an iPhone into one file with ffmpeg. I've tried everything I could find and I can't get anything to work right. My current line is ffmpeg -i 'concat:output.mov|capturedvideo.MOV' -vcodec copy -acodec copy output2.mov This currently won't work. The end result needs to be played on an iPhone.
• 20:16
  ffmpeg and jwplayer video not working - user2143556 Newest 'ffmpeg' Questions - Stack Overflow
  The converted .mp4 file through ffmpeg is working fine in my local machine. The command which i used is exec('ffmpeg -i inputfile.flv -vcodec libx264 outputfile.mp4'); But it is not working in the server. The converted file size shows 0 bites. I think codec libx256 is not supported in centos.
• 16:20
  How to pass swfurl to avconv/avplay - Mustafe Newest 'ffmpeg' Questions - Stack Overflow
  In order to play rtmp live stream in avplay/avconv some live stream needs swf urls. I can dump rtmp with rtmpdump by giving swfurl with parameter "-s" and pipe it to the avplay as in the below rtmpdump -r "rtmp://...../playpath" -s http://urlToswf.swf | avplay -i pipe:0 However I would like to give swf parameter directly to the avplay, in other words, how can we play it without using rtmpdump. In libav documentation here: http://libav.org/avprobe.html it is stated that with rtmp_pageurl you can pass this parameter but I can not achieve it. Here is a working rtmp link you can try on it. (...) -- http://libav.org/avprobe.html
• 17:20
  Why does calling ffmpeg from python block? - rosh Newest 'ffmpeg' Questions - Stack Overflow
  I tried 3 methods to call ffmpeg from python, but it always blocks and doesn't return any result. However, if I execute it from shell, it works. For eg: /usr/bin/ffmpeg -y -i /tmp/uploadedfiles/movie8_15_10s.mpg -ar 1600 -ac 1 /tmp/uploadedfiles/movie8_15_10s.mpg.wav this works. However, ffmpeg_command = "/usr/bin/ffmpeg -y -i test.wav testout.wav" f_ffmpeg=os.popen(ffmpeg_command); This makes the python hang.
• 16:38
  Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height - Mahmoud Khafagy Newest 'ffmpeg' Questions - Stack Overflow
  this is my command i exec() ffmpeg -i '1.mts' -deinterlace -ar 22050 -r 25 -qmin 3 -qmax 15 '1.flv' 2>&1 and this is output Array ( [0] => FFmpeg version SVN-r19795, Copyright (c) 2000-2009 Fabrice Bellard, et al. [1] => configuration: --enable-libmp3lame --enable-libvorbis --disable-mmx --enable-shared --prefix=/usr/ --enable-gpl [2] => libavutil 50. 3. 0 / 50. 3. 0 [3] => libavcodec 52.35. 0 / 52.35. 0 [4] => libavformat 52.38. 0 / 52.38. 0 [5] => libavdevice 52. 2. 0 / 52. 2. 0 [6] => libswscale 0. 7. 1 / 0. 7. 1 [7] => built on Nov 29 2012 01:11:06, gcc: 4.1.2 (...)
• 13:49
  Is it possible to compile ffmpeg in visual studio 2010? - Exitos Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to compile the sourcecode from ffmpeg in visual studio 2010? Is it difficult? Just looking for some advice (and instructions) if possible. :-) Cheers, Pete
• 14:39
  Difference between audio encoding/decoding and format conversion - talhamalik22 Newest 'ffmpeg' Questions - Stack Overflow
  Recently i have been trying to convert an audio file from one format to another through ffmpeg. i was trying to do some google but results made me a little confused about the difference between encoding and decoding an audio file and converting from one format to another.
• 13:55
  Horizontally show two videos side by side and export to one video - Michael Liberman Newest 'ffmpeg' Questions - Stack Overflow
  What I am trying to achieve: Programmatically (using some kind of script) combine two different videos to one video where the videos are shown side by side and sound from both videos is played simultaneously. I found at least two ways I could display two videos side by side but in each one I have a different problem that makes it difficult to complete the process: Avisyth and Avs2Avi: Avisyth really makes the process easy. With a simple Avisyth script like this you should be able to play two videos side by side: video1=AVISource("d:\\file1.avi") video2=AVISource("d:\\file2.avi") (...)
• 11:14
  Andriod streaming screen [closed] - blganesh Newest 'ffmpeg' Questions - Stack Overflow
  Im able to share screen via ffmpeg ./ffmpeg -f fbdev -r 24 -i /dev/graphics/fb0 http://localhost:8090/feed1.ffm But the output live stream is very slow. Following is the conf file which I'm using. `Port 8090 RTSPPort 7654 BindAddress 0.0.0.0 RTSPBindAddress 0.0.0.0 MaxHTTPConnections 2000 MaxClients 1000 MaxBandwidth 1000 CustomLog - NoDaemon File /data/live1.ffm FileMaxSize 40M NoAudio ACL allow 127.0.0.1 Feed live1.ffm Format mpeg2video NoAudio VideoBitRate 1024 VideoFrameRate 1 VideoBufferSize 10000 VideoSize 480x800 VideoQMin 1 VideoQMax 15 ` Kindly let me know how should I (...)
• 11:25
  geting no result from GetStringUTFChars JNI - talhamalik22 Newest 'ffmpeg' Questions - Stack Overflow
  android NDK for my android application. i am stuck on the starting lines and it is not compiling further. Following is my code. It doest not compile after "str = (*env)->GetStringUTFChars(env, filename, NULL);". Please check my java and c code The java code: public class MyffmpegActivity extends Activity private static native int logFileInfo(String filename); static Log.i("HEHA", "HOHA"); System.loadLibrary("mylib"); ⓐOverride protected void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_myffmpeg); String (...)
• 13:01
  video created using ffmpeg and H264 codec does not play on android :player says it is not a divx file - susheel tickoo Newest 'ffmpeg' Questions - Stack Overflow
  I have created a video from images using ffmpeg and H264 codec in C. I can run the video using a 3rd party player (V player ) on android devices. But the native player does not play the video. IT says that the file is not a Divx file. below is the code that i have used to create the video from images: JNIEXPORT void Java_com_canvasm_mediclinic_VideoGenerator_generate(JNIEnv *pEnv, jobject pObj,jobjectArray stringArray,int famerate,int width,int height,jstring videoFilename) AVCodec *codec; AVCodecContext *c= NULL; //int framesnum=5; int i,looper, out_size, size, x, y,j; int (...)
• 13:21
  FFMPEG: change sample rate/bit rate of a video with android-ndk - talhamalik22 Newest 'ffmpeg' Questions - Stack Overflow
  hi I am trying to change the sample rate of the audio streams of a video file using ffmpeg. but i am not able to change audio of the original file. Till now i am able to read audio and video streams separately and can show its sample rate. Don't know how can i apply this effect permanently. Following is my Java code. public class MainActivity extends Activity public static native float logFileInfo(String inputfilename); static System.loadLibrary("mylib"); ⓐOverride public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); TextView tv= new TextView(this); (...)
• 05:45
  av_read_frame function in ffmpeg in android always returning packet.stream_index as 0 - droidmad Newest 'ffmpeg' Questions - Stack Overflow
  I am using the following standard code pasted below (ref: http://dranger.com/ffmpeg/) to use ffmpeg in android using ndk. My code is working fine in ubuntu 10.04 using gcc compiler. But I am facing an issue in android.The issue is av_read_frame(pFormatCtx, &packet) is always returning packet.stream_index=0. I have tested my code with various rtsp urls and I have the same behaviour in all cases. I do not have any linking or compiling issues as everything seems to be working fine except this issue. I am trying to solve this from last 2 days but I am stuck badly.Please point me in right (...) -- http://dranger.com/ffmpeg/
• 02:56
  Install ffmpeg in windows 7 x64 - Bruno Ribeiro Newest 'ffmpeg' Questions - Stack Overflow
  I have a problem to install ffmpeg, I tried several tutorials but did not. I tried using the dll and executables but could not get the result is always. "Fatal error: Call to undefined function dl ()" I went on the official website and downloaded the dlls did the procedure in playing in system32 and php / ex and declared the extension in php.ini but does not work. I am using the version of php 5.3.13. I was thinking it was the version of php what do you think? I'm using WampServer (...)

8 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 18:13
  Identifying Audio bit rate using FFMPEG - user1756535 Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFMPEG to identify the bit rate of an audio file in my Rails app. I am downloading the file from S3, and storing temporarily in the tmp folder, then running FFMPEG commands against it. Locally everything is running absolutely as expected. The problem comes when deploying, and I get nothing returned from FFMPEG. s3 = AWS::S3.new( :access_key_id => ENV["AWS_ACCESS_KEY_ID"], :secret_access_key => ENV["AWS_SECRET_ACCESS_KEY"]) object = s3.buckets[ENV["AWS_S3_BUCKET"]].objects[CGI::unescape(self.url)] tempname = Digest::MD5.hexdigest(DateTime.now.to_s) + "." + self.file_format (...)
• 16:40
  Setting B frames in a video with ffmpeg - Robert Cantarutti Newest 'ffmpeg' Questions - Stack Overflow
  According to ffmpeg manual, setting -g is to define space between "I" frames, and setting -bf to use "B" frames. The former I got, but the latter not. The goal: I'm trying to have a video with a GOP 3,12 (M= 3, N=12). That means: 2 "B" frames separating each "P" frames, and "I" frames with 12 frames of distance. Or simply: "IBBPBBPBBPBBI" I think that I got only the N=12, using the commands below: ffmpeg -s cif -r 30 -b 64000 -bt 3200 -g 12 -y -i video.yuv -vcodec mpeg4 video.m4v MP4Box -hint -mtu 1460 -fps 30 -add video.m4v video.mp4 ffmpeg -y -i video.mp4 video_ref.yuv ../cmd/psnr (...) -- http://www2.tkn.tu-berlin.de/research/evalvid/cif.html
• 12:46
  FFMPEG: convert a mp4 to mp3 using ffmpeg-android ndk - talhamalik22 Newest 'ffmpeg' Questions - Stack Overflow
  I want to convert a video file of mp4 format to audio file of mp3 format. It is simple through command line but i cannot find how can i convert it through jni. Not sure which library and which function to call. Any help regarding this issue would be much appreciated.
• 07:36
  Decoding realtime h264 stream using ffmpeg.Do I need to set zero-lantancy to ffmpeg.How to set it - penghao Newest 'ffmpeg' Questions - Stack Overflow
  I write something like realtime video conference application. I use x264 library to encode a realtime video data, Then I put the data to another end throughout the network. I want to decode the realtime h264 stream using ffmpeg library. When I encode, I know a lot of thing need to set,like --rc-lookahead 0 --sync-lookahead 0. But on the another end of decoding, I don't know whether the same thing need to set. And how to set these option to the real decoder in ffmpeg. Thanks in (...)
• 05:25
  fragmented mp4 javascript converting - user816004 Newest 'ffmpeg' Questions - Stack Overflow
  I wanted to know if there is a way to convert regular mp4 to a fragmented mp4 via javascript. (like mp4box does) Is it efficient enough (not suppose to be a complicated task)? did anyone write something like this? to make it harder, can it be on the fly? meaning I will not download the whole mp4 from the server but download in parts and convert it into fragments compatible with fragmented mp4 and mpeg-dash - I'm trying to overcome to problem to not have to use 2 different file types to play a video or do mp4box on all my library in advance. Regardless, is it possible to convert from (...)

7 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 19:14
  add timestamp using exiv [closed] - user2052665 Newest 'ffmpeg' Questions - Stack Overflow
  I need help with a problem. I have a video which I have to make a frame for every second of it, for that I use the command: ffmpeg. The resulting images have no timestamp and I need to add. First question: There is the possibility of the ffmpeg command already taking images with the timestamp of when they were in the movie? Second question: If not possible, how to exiv2 (or other tool) I can add that value?
• 19:14
  ffmpeg: progressive to interlaced - user732274 Newest 'ffmpeg' Questions - Stack Overflow
  I have a progressive 50FPS video (made deinterlacing an interlaced 25FPS video using YADIF): is there a way to bring it back to its original format (25FPS, interlaced)? I know there's tinterlace, but it doesn't seem to work (the output frame rate is still 50FPS, no matter what value I use for this filter).
• 04:20
  ffmpeg/ffprobe show_frames option - user1526912 Newest 'ffmpeg' Questions - Stack Overflow
  I recently installed ffmpeg version 0.8.5-4:0.8.5 on my Ubuntu Linux box. When I execute "ffprobe -show_frames http://test.com/test.mp4" I get the following error: Unrecognized option 'show_frames' I have tried installed all sorts of ffmpeg dependent packages to fix this without any success. Can someone help to resolve this error by telling me what I need to install exactly to fix this? Thanks -- http://test.com/test.mp4

6 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 21:42
  How to get number of I/P/B frames of a video file? - Greper Newest 'ffmpeg' Questions - Stack Overflow
  I want to extract information of a video file to get the count of its I/P/B frames. How to do it in ffmpeg? Or should I programming using libavformat and libavcodec to do it? Many thanks!
• 15:10
  convert code which uses javax.sound.sampled in android - adityag Newest 'ffmpeg' Questions - Stack Overflow
  I want to mix two audio files in android. First a song from library and second a sound recorded from mic. To begin with, I tried doing it on desktop using JS Resources Audio concat Program Using this code, I can mix/merge/overlap 2 sound wav files on desktop when i use float mix mode (-f). Now I was trying to do this in android environment. But found that javax.sound.sampled.*; used in this code is not supported by android. Can anyone guide me how to deal with this situation ? Thanks, Aditya. PS: other approach i tried is trying to use some ffmpg. But frankly, I couldnt understand (...) -- JS Resources Audio concat Program
• 14:58
  Extracting text subtitles using ffmpeg libraries - John Smith Newest 'ffmpeg' Questions - Stack Overflow
  I'm writing a C program that uses the ffmpeg's libav* libs, and using Dranger's tutorial, I can decode both audio and video correctly. Currently, I'm trying to extract subtitles. I actually don't want to decode them on time and display them on the video, but actually extract the subtitle text out of the container. For example, on the cli, ffmpeg -i video.mkv -map 0:4 -scodec copy out.ass would give me the ass file back. (For some reason, srts only return the text.) I've tried messing with AVSubtitle, avcodec_decode_subtitle2, etc., but they're returning the (...) -- Dranger's tutorial
• 15:22
  ffmpeg decoding yuv420p to rgb shifts luminance/brightness down - glopes Newest 'ffmpeg' Questions - Stack Overflow
  I'm recording video from a grayscale camera into an MPEG4 video file using FFMPEG. Recently I noticed a weird effect: if I playback the file using FFMPEG or windows media player, the output frames are noticeably darker (by about 10 brightness values) than the original source. I thought the encoding step was doing this until I opened the same file in VLC and it gave me back the correct result. I played around with FFMPEG command lines to decode a single frame and realized that if I decode a frame into GRAY8 pixel format, the brightness/luminance values are preserved. Here's the (...)
• 01:55
  FFmpeg: calculate time to convert images and .mp3 to a video - DomenK Newest 'ffmpeg' Questions - Stack Overflow
  Is there any formula that I can use to calculate the time that FFmpeg uses to convert a single .jpg image and .mp3 song to a video? I am using the following code: ffmpeg -loop 1 -r ntsc -i image.jpg -i song.mp3 -c:a copy -c:v libx264 \\ -preset fast -threads 0 -shortest Lets say we have an image with X resolution and .mp3 length of L. Would the formula be: time = X * L(in seconds) ? Thanks for any tips.

5 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:55
  Who can tell me the difference and relation between ffmpeg, libav, and avconv - why Newest 'ffmpeg' Questions - Stack Overflow
  when I run ffmpeg on Ubuntu, it shows: $ ffmpeg ffmpeg version v0.8, Copyright (c) 2000-2011 the Libav developers built on Feb 28 2012 13:27:36 with gcc 4.6.1 This program is not developed anymore and is only provided for compatibility. Use avconv instead (see Changelog for the list of incompatible changes). or it shows (depending on Ubuntu version): $ ffmpeg ffmpeg version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers built on Jan 24 2013 14:49:20 with gcc 4.7.2 *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be (...) -- http://libav.org
• 04:13
  watermark video with ffmpeg at specified duration [duplicate] - Paige Cherry Newest 'ffmpeg' Questions - Stack Overflow
  This question is an exact duplicate of: ffmpeg vfilters at specific timecodes 1 answer Is it possible to watermark video with ffmpeg at specified intervals and in the whole video duration? I am using windows.
• 13:18
  Building Ffmpeg library for iOS6.0 ARMv7 Processor success but compile error - user1800270 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use the FFMPEG library in an XCode 4.5.1 project. And I'm trying to build it for ARMv7. I had already build library by use the method below (provide by Alex): Here is my working Configure for cross-compiling FFmpeg on iOS 6 the arch is ARMv7 NOTE: You must have to have gas-preprocessor.pl inside /usr/local/bin/ please do not continue until you have gas-preprocessor.pl on your bin directory Download FFmpeg 1.0 "Angel" from here Unzip it and place it somewhere i.e. your Desktop folder Open terminal and browse to unzipped FFmpeg folder Copy and paste the (...)
• 13:42
  ffmpeg Video Scan Progress during Frame Extarction - Isantipov Newest 'ffmpeg' Questions - Stack Overflow
  I scan input video to extract certain frames using ffmpeg's select filter. The selection is based on a complex creteria and the number of extracted frames can't be predicted (I'm doing scene detection, but this can be something different - e.g. selecting all the I frames, etc). What I need is to display the percentage of scanned (decoded) video (e.g. 10% or 90%). I tried several ways to do this parsing console output as people usually do when dealing with encoding, but it doesn't help with the progress of scanning (e.g. Can ffmpeg show a progress bar? or ffmpeg Progress (...) -- select
• 16:18
  Trying to compile the FFMPEG libraries for iPhoneOS platform with armv6 and arv7 architecture - Er Amit Sachdeva Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to compile the FFMPEG Libraries for IOS platform with arm7 architecture. I downloaded the FFMPEG libraries from http://www.ffmpeg.org. I'm successfully able to build the static libraries for the i386 architecture for the iPhoneSimulator. But I need the libraries for iPhoneOS. Using the configure command I'm getting an error. Below are my command details. For i386(which is error free): ./configure --enable-cross-compile --disable-debug --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-doc --disable-network --disable-everything (...) -- http://www.ffmpeg.org
• 13:57
  converting files with FFMPEG ... NO MOOV ATOM at the end of the file - Popa Ovidiu-Razvan Newest 'ffmpeg' Questions - Stack Overflow
  I'm doing the following: I use FFMPEG into a Delphi XE2 program to convert any file that I receive into a mp4 file. I also use qr-faststart to move the atom to the begin of the file after converting. The problem is after the conversion of some files (not always) the qr-faststart give the following error: "encountered non-QT top-level atom (is this a QuickTime file?)" "last atom in the file vas not a moov atom" The command line for FFMPEG is : -i "sourceFile" -sameq "destinationFile" The command line for qt-faststart is "sourceFile" "destFile" Here is the full code of both (...)
• 10:41
  Bambuser ffmpeg - "arm-linux-androideabi-gcc is unable to create an executable file." - Chaitanya Chandurkar Newest 'ffmpeg' Questions - Stack Overflow
  I know this may be possible duplicate of some questions. but answers for those threads are not helping me. I am trying to compile ffmpeg library for android using Bambuser's ffmpeg. I downloaded Archive for client versions 1.3.7 to 1.6.0. from bambuser. I followed instruction given in REAME. While running ./build.sh i came across following error arm-linux-androideabi-gcc is unable to create an executable file. C compiler test failed. If you think configure made a mistake, make sure you are using the latest version from SVN. If the latest version fails, report the problem to the (...) -- Archive for client versions 1.3.7 to 1.6.0.
• 11:37
  Use FFmpeg in Visual Studio - box Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use FFmpeg in a C++ project in Visual Studio 2010. I want to include the libraries as statically linked files. Simple programs like libavcodec/api-example.c compile without error and no linker error appears in the error view when starting them. However, a message box shows up after starting the application, saying that avutil-51.dll is missing. Do you have any hints on how to fix that? I used the latest dev build from http://ffmpeg.zeranoe.com/builds/. Then I specified include as additional include directory, avcodec.lib;avfilter.lib;avformat.lib;avutil.lib as (...) -- libavcodec/api-example.c, http://ffmpeg.zeranoe.com/builds/
• 12:28
  What is the correct path video using Streamio FFMPEG on Rails - Khalid Newest 'ffmpeg' Questions - Stack Overflow
  I follow this gem https://github.com/streamio/streamio-ffmpeg , then I do this : movie = FFMPEG::Movie.new("#Rails.root/public/aaa.mov") but the result is : Errno::ENOENT: No such file or directory - ffmpeg -i /home/user/projects/test/public/aaa.mov Does anyone know ? Thanks -- https://github.com/streamio/streamio-ffmpeg
• 08:17
  ffmpeg problems using avcodec_close - digitalPhonix Newest 'ffmpeg' Questions - Stack Overflow
  How is avcodec_close supposed to be called in ffmpeg? This is the simplest code which reproduces my problem: bool CDataSequenceFormat::openVideoCodec( AVStream* videoStream ) AVCodecContext* codecContext = videoStream->codec; AVCodec* codec = avcodec_find_encoder(codecContext->codec_id); if (codec == NULL || avcodec_open2(codecContext, codec, NULL) avcodec_open2 doesn't return an error and avcodec_is_open returns 1, so I am assuming the codecContext has been set up properly. Am I wrong to assume this? When I call avcodec_close immediately after, I get an access violation exception (...)
• 07:55
  FFmpeg streaming: can't see image from h263 stream in flash - JustLogin Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFmpeg for live rtmp-streaming of my desktop to Wowza. If I publish stream in h264 or flashsv2 codec, everything works fine, but I need h263 support too. The problem is, that I see no images from stream in Flash, if my stream's codec is H263! I catch NetStream.Play.Start event, and even get video's metadata, but no image is displayed in my Video object. There was the same problem with h264, when I tried to stream it with this command: ffmpeg -f dshow -i video=UScreenCapture -vcodec h264 -f flv rtmp://[adr]/desc Choosing yuv420p pixel format fixed this bug. So, (...)
• 07:32
  What do these two parts of libavcodec/h263data.h do exactly? - Chris Lindgren Newest 'ffmpeg' Questions - Stack Overflow
  Below are two segments of code from the FFMPEG library, specifically located here: libavcodec/h263data.h (http://ffmpeg.org/doxygen/0.6/h263data_8h-source.html). I would like to know more about how these two segments operate in the larger context of the codec library. Below, after these examples, I describe my understanding thus far and provide two clearer questions that I would like answers on. Thank you for any help! EXAMPLE 1 00035 /* intra MCBPC, mb_type = (intra), then (intraq) */ 00036 const uint8_t ff_h263_intra_MCBPC_code[9] = 1, 1, 2, 3, 1, 1, 2, 3, 1 ; 00037 const uint8_t (...) -- http://ffmpeg.org/doxygen/0.6/h263data_8h-source.html, http://en.wikipedia.org/wiki/Stdint.h#stdint.h
• 04:08
  ffmpeg imlib2.so watermarking troubles - ggggggggg Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to watermark a flash video, but it throws long list of "Unsupported Codec". So, is flv not supported at all ? Do I need to convert it to .avi and watermark ?
• 04:05
  Ffmpeg watermarking multiple images - r3zfr Newest 'ffmpeg' Questions - Stack Overflow
  I'm a bit puzzled here and can't find an answer to the following question. Is it possible to have 2 .png files watermarked into a video in a single command line with Libavfilter? I'm using this commandline, but everything I try to get the second PNG image in it fails. ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:10 [out]" outputvideo.flv
• 02:57
  Trying to sync audio/visual using FFMpeg and openAL - user1379811 Newest 'ffmpeg' Questions - Stack Overflow
  Nevermind, I give up. Thank you!
• 01:16
  ios compile ffmpeg without ac3 support - resident_ Newest 'ffmpeg' Questions - Stack Overflow
  I'm making a video player for iOS Devices. I use a ffmpeg libraries to play the video files. I see the problems that have other video players in the App Store with the AC3 sound support. I want that my video player don't works with AC3 sound. I'm looking for arguments in the compile script ffmpeg libraries like a "--enable-gpl" and "--enable-nonfree", but not works. I read the licenses of ffmpeg libraries several times and I think that I don't understand well. Can someone explain how to do this? (...)

4 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 16:02
  How to convert vob to wmv with ffmpeg with medium quality? - Andrey Pietrov Newest 'ffmpeg' Questions - Stack Overflow
  if use as parameters: string.Format("-i 0 -vcodec wmv2 -acodec wmav2 -sameq 1", inputFileName, outPutFileName) output file size is very big. if use : string.Format("-i 0 -vcodec wmv2 -acodec wmav2 1", inputFileName, outPutFileName) output file quality is ery low. How to get medium quality with ffmpeg?
• 20:51
  CANNOT LINK EXECUTABLE error with required libs loaded. How to link them properly? [duplicate] - dentex Newest 'ffmpeg' Questions - Stack Overflow
  This question already has an answer here: Android NDK - Library not found CANNOT LINK EXECUTABLE - how to set LD_LIBRARY_PATH? 1 answer edit: I'm aware of the possible duplicate, but the answer it's not directly applicable. I'm using ProcessBuilder and not Runtime.getRuntime().exec: public int execProcess(List cmds, ShellUtils.ShellCallback sc) StringBuilder cmdlog = new StringBuilder(); for (String cmd : cmds) cmdlog.append(' '); Utils.logger("v", cmdlog.toString(), DEBUG_TAG); ProcessBuilder pb = new ProcessBuilder(); pb.directory(mBinFileDir); pb.command(cmds); (...)
• 18:04
  ffmpeg Decoding Progress during Frame Extarction - Isantipov Newest 'ffmpeg' Questions - Stack Overflow
  I scan input video to extract certain frames using ffmpeg's select filter. The selection is based on a complex creteria and the number of extracted frames can't be predicted (I'm doing scene detection, but this can be something different - e.g. selecting all the I frames, etc). What I need is to display the percentage of scanned (decoded) video (e.g. 10% or 90%). I tried several ways to do this parsing console output as people usually do when dealing with encoding, but it doesn't help with the progress of scanning (e.g. Can ffmpeg show a progress bar? or ffmpeg Progress (...) -- select
• 19:52
  Generate thumbnail for text file - Felipe Schenone Newest 'ffmpeg' Questions - Stack Overflow
  Suppose a user uploads a .txt or .php file, and I want to generate a .png thumbnail for it. Is there a simple way of doing it, that doesn't require me to open the file and write its contents into a new .png? I have ImageMagick and FFmpeg available, there must be a way to take advantage of that, but I've been looking a lot and no luck yet. Thanks in advance.
• 18:11
  FFMPEG audio decoding: efficient conversion from short to float sample buffer - Hyndrix Newest 'ffmpeg' Questions - Stack Overflow
  I am using the FFMPEG avcodec_decode_audio* to decode audio input files of various types. The resulting samples are of type SHORT. These samples are processed with another library which requires the samples in FLOAT input format. Finally, for playback (on Android), I need to convert the FLOAT samples back to SHORT again: short* inputSamples = ...; float* tmpBuffer = new float[nrInputSamples]; for (int i=0; i Is there a more efficient way to do this (for instance force ffmpeg to decode the audio to FLOAT samples)? (...)
• 18:10
  ffmpeg convert mov file to mp4 for HTML5 video tag IE9 - Adidi Newest 'ffmpeg' Questions - Stack Overflow
  I looked every where here and in the google - there is no valid command that works for IE9. some how IE9 is missing something. All that I tried worked everywhere else: chrome,safari,mobile device etc... I want one command that will convert it and I can use it in every device suppose to support mp4 in HTML5 video tag. I use this commands: ffmpeg -i movie.mov -vcodec copy -acodec copy out.mp4 ffmpeg -i movie.mov -vcodec libx264 -vprofile high -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=-1:480 -threads 0 -acodec libvo_aacenc -b:a 128k -pix_fmt yuv420p outa.mp4 ffmpeg -i (...)
• 14:37
  Getting log line for each extracted frame from FFMPEG - wpfwannabe Newest 'ffmpeg' Questions - Stack Overflow
  I am using FFMPEG.exe to extract frames from various videos. As this is a programmatic solution and getting the total frame count and/or duration can prove tricky (with ffprobe), I am thinking I could use the console output to detect individual frames' timestamps but I am getting a single output line every N frames like this: frame= 20 fps=0.0 q=0.0 size= 0kB time=00:00:01.72 bitrate= 0.0kbits/s frame= 40 fps= 38 q=0.0 size= 0kB time=00:00:04.02 bitrate= 0.0kbits/s frame= 60 fps= 39 q=0.0 size= 0kB time=00:00:06.14 bitrate= 0.0kbits/s frame= 70 fps= 38 q=0.0 Lsize= 0kB (...)
• 16:15
  Using zeranoe libavcodec build in visual studio 2008 - Imran Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use libavcoded shared build from zeranoe in visual studio 2008. I have tested my application using libavcodec in debug mode and it is running fine. but when i am trying to build the application through release version then it compiles fine but while running it is showing error as "The procedure entry point CoCreateInstance could not be located in the dynaminc link library avcodec-54.dll" Can any one please help me to solve this issue.
• 16:58
  rtp streaming using av_interleaved_write_frame or av_write_frame - sinan Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg windows libraries to rtsp/rtp demux and muxing. But I have problem about processing time of av_interleaved_write_frame or av_write_frame, for example for h264 encoded 1920x1080 pictures it takes 10-20 ms for p frames and 70-100 ms for I frame. I am using VLC for receiver and network bandwith is 100Mb, operating system is 32 bit windows7. If I choose smaller size picture processing time is decreases but it still over for my expectation. Is it normal these processing times. (...)
• 13:16
  How to build a daemon to encode video files on S3? - Yuval Cohen Newest 'ffmpeg' Questions - Stack Overflow
  I am interested in running a daemon to go over user uploaded video files and encode them in an optimal format (and add some watermarks). I was considering services such as Zencoder, Encoding.com, Amazon's encoding service but some lack overlaying capabilities and some are just too expensive for our (big) volumes. I want to build a daemon that encodes videos that are located on S3 once users upload them. The solution I thought of would be Python Heroku servers using Celery for a task queue to keep track of the encoded files and ffmpeg to do the actual work. However, I ran into (...)
• 01:52
  H.264 is patented. What happens when developing a commercial app in Android using H264 codec in ffmpeg? [closed] - user1914692 Newest 'ffmpeg' Questions - Stack Overflow
  H.264 is patented. In countries where patents on software algorithms are upheld, vendors and commercial users of products that use H.264/AVC are expected to pay patent licensing royalties for the patented technology[14] that their products use. What happens when developing a commercial app in Android using H264 codec in ffmpeg? Here there are two situations: (1) decode online video stream, and display it. (2) encode contents to a video file using (...) -- H.264 is patented
• 08:31
  why I can't compile x264 or ffmpeg downloaded from git - Monjura Rumi Newest 'ffmpeg' Questions - Stack Overflow
  It has been just a few days that I am using x264, ffmpeg and trying to take help from codes in git. I am always having some peculiar problem. It seems like no one or few people faced such problems. Here is one of those problems. If I download x264 or ffmpeg using git then I could not compile that source code. At first terminal will show ./configure: Permission denied. Then If I change permission of configure file using chmod 755 command then it will show ./configure: /bin/bash^M: bad interpreter: No such file or directory. To build x264 and ffmpeg I have followed this link (...) -- https://github.com/lince/libffmpeg-c/wiki
• 08:03
  Flash / FFMPEG / Linux Video Broadcasting [closed] - Grant Adkins Newest 'ffmpeg' Questions - Stack Overflow
  I'm looking for a way to have a "virtual" online tv network.. kinda like shoutcast radio with auto dj where I can set the programing lineup or just randomize from files on the server and maybe the possibility of having live streams as well.. all to be streaming 24/7 on a website hopefully with a flash or dependable player.. I've kinda looked into nullsoft video but does anyone else know a solution that might help?
• 08:01
  avcodec_find_encoder(AV_CODEC_ID_H264) returns null - Monjura Rumi Newest 'ffmpeg' Questions - Stack Overflow
  I am building an android application which will encode image captured from camera preview and later decode it. I am using ffmpeg library to encode and decode. To build static library with x264 I have used this tutorial. http://dl.dropbox.com/u/22605641/ffmpeg_android/main.html. As a source code of ffmpeg if I use the one downloaded from the link given in tutorial I can built it but can't build library if i use source code downloaded from here git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg. I have built library in ubuntu and using it in windows 7 in Eclipse. As I need only h264 (...) -- http://dl.dropbox.com/u/22605641/ffmpeg_android/main.html
• 04:00
  webcam streaming with ffserver, ffmpeg, how to crop image - user1971455 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to stream a webcam using ffserver and ffmpeg. It works well but now I want to crop the image using ffmpeg's crop filter. The problem is that the crop filter has no effect on the streaming video. The command I am using is: ffserver -f /etc/ff.conf & ffmpeg -v verbose -r 5 -s 640x480 -f video4linux2 -i /dev/video0 -vf crop=620:400:0:0 http://localhost/webcam.ffm My ff.conf contains this: Port 80 BindAddress 0.0.0.0 MaxClients 10 MaxBandwidth 50000 NoDaemon file /tmp/webcam.ffm FileMaxSize 10M Feed webcam.ffm Format mpeg VideoSize hd720 #640x480 VideoFrameRate 10 (...)
• 03:00
  How to use the result of guardian-ffmpeg-Android? - user1914692 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to build ffmpeg on Android. There are many tutorials. Some are very old. So I want to try one that can use newer version of ffmpeg and Android NDK. After long time searching, I find one, guardianproject / android-ffmpeg The project was updated several months ago. NDK r8 is used. ffmpeg is put from online, so a latest version. After I follow all the instruction, I am confused which result I should use, and how to use it. The README mentions testing, like: # embedding metadata into a matroska video /data/local/ffmpeg -y -i test.mp4 \\ -attach attach.txt -metadata:s:2 (...) -- guardianproject / android-ffmpeg

3 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 10:59
  ld: file too small for architecture armv7 mac [closed] - user1500842 Newest 'ffmpeg' Questions - Stack Overflow
  Ld /Users/IPhoneDev/Library/Developer/Xcode/DerivedData/sqeyes-fmajgifqwrcamzdmsdzkoydwlxsv/Build/Intermediates/sqeyes.build/Debug-iphoneos/sqeyes.build/Objects-normal/armv7/sqeyes normal armv7 cd /Users/IPhoneDev/Project/sqeyes setenv IPHONEOS_DEPLOYMENT_TARGET 4.3 setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch armv7 -isysroot (...)
• 21:59
  How to batch convert mp4 files to ogg with ffmpeg using a bash command or Ruby - TJ Sherrill Newest 'ffmpeg' Questions - Stack Overflow
  I am running a OSX, don't know tons about video conversions. But I have like 200 videos that are all in mp4 format and won't play in Firefox. I need to convert them to ogg to use the html5 video tag. These files live in a folder structure that makes it hard to do files one at a time. I would like the bash command or Ruby command to go through all child folders and find all .mp4's and convert them. I found one reference of how to do this with Google: http://athmasagar.wordpress.com/2011/05/12/a-bash-script-to-convert-mp4-files-to-oggogv/ #!/bin/bash for f in $(ls *mp4 | sed (...) -- http://athmasagar.wordpress.com/2011/05/12/a-bash-script-to-convert-mp4-files-to-oggogv/
• 20:35
  Simulating TV noise - Alex Newest 'ffmpeg' Questions - Stack Overflow
  I have googled a bit but was never able to find an answer. What should be my first approach to simulate a video and audio noise from TV on screen? I mean, when my TV antenna is removed but the TV is still on (like they show in Japanese horror movies sometimes). I can use ffmpeg or any other technique but what is the simplest possible form of the signal?
• 22:15
  using pocketsphinx_continuous with a .wav file - user2242131 Newest 'ffmpeg' Questions - Stack Overflow
  I am attempting to write an application that will allow a user to speak a small set of commands from a remote system and have them executed on my server. Using pocketsphinx to parse the spoken text. When run locally with the microphone, pocketsphinx_continuous works perfectly no matter how I slur the words. But when importing the audio file and using ffmpeg to downsample the audio to a single channel, 16 bit PCM file, it will parse the first word without difficulty. Then it will skip everything else and treat it as . I am confident that the problem is in the file format and not in the (...)
• 17:15
  ffmpeg wav output length not correct or consistant - user2241026 Newest 'ffmpeg' Questions - Stack Overflow
  Trying to run a very simple command via php a exec() command. All my other commands are working fine except for a simple audio trim that I am trying to run. The user posts a file, and a start time (in mm:ss.xxx format). and ffmpeg is supposed to trim the file to 5 seconds after the start time. The problem is, some times it works, but other times the audio file is 6 or even 7 seconds long. I can't figure out the problem. Oh, I'm aware of the lack of sanitizing in the code right now. here is the PHP code //user entered number for example "01:30" //$newFilePath1 is the location of (...)
• 16:51
  Streaming video segments uploaded in real time - HaneTV Newest 'ffmpeg' Questions - Stack Overflow
  I have an application that send quicktime video segments (5s) to a nodejs server that convert them into mpeg-ts in order to stream them to a wowza server in real time : ffmpeg -i tempPath -c copy -bsf:v h264_mp4toannexb -f mpegts uploadDir/file.ts I want to know if there is a way to stream those segments in real time as they come on my nodejs server to a wowza server without interruption (assuming I can get the segments in time). I tried an Http live streaming style by making a playlist like this (updated when segments are uploaded) #EXTM3U #EXT-X-PLAYLIST-TYPE:EVENT (...)
• 18:40
  ffmpeg fails on conversion from .mov to .mp4 fails aT 98% - user2241249 Newest 'ffmpeg' Questions - Stack Overflow
  Our code is below. When converting a uploaded .mov to .mp4 the conversion halts at 98%. Almost all of our other preferred formats encode flawlessly. Anyone has any clue on where we went wrong? We are struggling on this for a while now so we want to ask the experts, thanks in advance for any help. Converting.......... #mainDiv margin:auto 0; text-align: center; #progressbar_pbText display: block; margin-top: -22px; #fileInformation color: red; padding: 16px; 2) $FileInstance['PassNeeded'] = $FileInstance['PassNeeded'] - 1; array_unshift($_SESSION['Files'], (...)
• 12:50
  OpenCV+ffmpeg: Set max_analyze_duration? - Christian Jonassen Newest 'ffmpeg' Questions - Stack Overflow
  import sys import cv video = "http://192.168.1.15:8000/video.mjpg" # from motion capture = cv.CaptureFromFile(video) print capture cv.NamedWindow('Stream', 1 ) while True: frame = cv.QueryFrame(capture) if frame is None: print "No frame, exiting program" break else: cv.ShowImage('Stream', frame) cv.WaitKey(20) , which sort of works. Meaning that after a while, I get Using network protocols without global network initialization. Please use avformat_network_init(), this will become mandatory later. Using network protocols without global network initialization. Please use (...)
• 12:21
  How to build and link FFMPEG to iOS? - Alexander Tkachenko Newest 'ffmpeg' Questions - Stack Overflow
  all! I know, there are a lot of questions here about FFMPEG on iOS, but no one answer is appropriate for my case:( Something strange happens each case when I am trying to link FFMPEG in my project, so please, help me! My task is to write video-chat application for iOS, that uses RTMP-protocol for publishing and reading video-stream to/from custom Flash Media Server. I decided to use rtmplib, free open-source library for streaming FLV video over RTMP, as it is the only appropriate library. Many problem appeared when I began research of it, but later I understood how it should work. Now (...)
• 09:45
  Using FFMPEG to losslessly convert YUV to another format for editing in Adobe Premier - Wolfman's Brother Newest 'ffmpeg' Questions - Stack Overflow
  I have a raw YUV video file that I want to do some basic editing to in Adobe CS6 Premiere, but it won't recognize the file. I thought to use ffmpeg to convert it to something Premiere would take in, but I want this to be lossless because afterwards I will need it in YUV format again. I thought of avi, mov, and prores but I can't seem to figure out the proper command line to ffmpeg and how to ensure it is lossless. Thanks for your help.
• 08:58
  Steps to develop Live video chat application for iOS. Please guide [closed] - Er Amit Sachdeva Newest 'ffmpeg' Questions - Stack Overflow
  I want to develop a application which enables to user for live video chat between two devices which are connected under LAN. Please guide me a right path to go for learning/implementation of that.
• 07:05
  Getting Error during executin native android code - dilipkaklotar Newest 'ffmpeg' Questions - Stack Overflow
  Error on my console bash: cannot set terminal process group (-1): Inappropriate ioctl for device bash: no job control in this shell Your group is currently "mkpasswd". This indicates that your gid is not in /etc/group and your uid is not in /etc/passwd. The /etc/passwd (and possibly /etc/group) files should be rebuilt. See the man pages for mkpasswd and mkgroup then, for example, run mkpasswd -l [-d] > /etc/passwd mkgroup -l [-d] > /etc/group Note that the -d switch is necessary for domain users. ]0;~ DILIPⓐDILIP-PC ~ $ public class VideoBrowser extends ListActivity (...)
• 00:57
  ffmpeg no video with supported format and mime type - Sam Healey Newest 'ffmpeg' Questions - Stack Overflow
  Im using ffmpeg on centos6. Im trying to convert a video I have mpeg4 selected as output extension. When I try to view the video in firefox I get the following error - no video with supported format and mime type. If I view it in ie I just get 1 frame, it looks just like a photo, I click it to play it but nothing happens. What do I need to do?
• 01:38
  Capture RTSP stream with FFmpeg with not frequently URL - Sony Newest 'ffmpeg' Questions - Stack Overflow
  FFmpeg doesn't capture RTSP URL like this: rtsp://domain.com/path/stream?getParam1=x&getParam2=y Only like this: rtsp://domain.com/path/filename.extension Do you have a tip?

2 April

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:38
  Video processing / playback with alpha channel in C# or C++ [closed] - Corylulu Newest 'ffmpeg' Questions - Stack Overflow
  WHAT I'M AFTER I've been exploring the best ways to do this, but seem to keep running into hiccups when trying to playback video and then grab the frame with an alpha channel (ARGB) to then be further manipulated. I've gotten everything to work with AForge to then find out that the Alpha gets stripped out during the process. I considered OpenCV, but the Emgu CV has a different license that I can't use and I can't verify that OpenCV can read Alpha channels as well. I looked into FFMPEG .NET wrappers, but haven't found any that are out of their alpha phase or have (...)
• 20:42
  Why does FFMPEG always make large WebM files? - Student of Hogwarts Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to encode my movies into WebM: ffmpeg -i input.MOV -codec:v libvpx -quality good -cpu-used 0 -b:v 10k -qmin 10 -qmax 42 -maxrate 10k -bufsize 20k -threads 8 -vf scale=-1:1080 -codec:a libvorbis -b:a 192k output.webm I want to encode at a couple of different bit rates (video and audio combined): 2192 kbps 1692 kbps 1000 kbps The problem is that no matter which bit rates I enter, I always get a file with a bit rate higher than 1900 kbps. (1914 kbps with the code example above.) What am I doing (...)
• 19:15
  FFmpegFrameGrabber crashes 100% of time attempting to compress video on Android - esilver Newest 'ffmpeg' Questions - Stack Overflow
  I am attempting to use javacv/ffmpeg to compress video on an Android device prior to upload. I am using this code: FrameGrabber grabber = new FFmpegFrameGrabber(inputFile.getAbsolutePath()); grabber.start(); FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFile.getAbsolutePath(), grabber.getImageWidth(), grabber.getImageHeight(), grabber.getAudioChannels()); recorder.setVideoCodec(com.googlecode.javacv.cpp.avcodec.AV_CODEC_ID_MPEG4); recorder.setAudioCodec(com.googlecode.javacv.cpp.avcodec.AV_CODEC_ID_PCM_S16LE); (...) -- this code
• 15:00
  What does the ffmpeg loglevels mean? [closed] - naxa Newest 'ffmpeg' Questions - Stack Overflow
  FFmpeg has several loglevels (see -loglevel). These are, in order: quiet, panic, fatal, error, warning, info, verbose and debug. But the documentation is not very verbose with explaining their meanings. It's true that all names are self-documenting enough so they give some intuitive sense for when to use them. But when in doubt, from the user as well as the developer's perspective, in decision situations, it would help to have a clear definition of each level. I would like to know which one is for what purpose, in order to know when to use them. I couldn't find any more (...) -- -loglevel, code for these
• 11:56
  Using FFmpeg in C# project - JustLogin Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a desktop live-streaming app in C#. The program must run under Windows and stream image from user's desktop to rtmp. There must also be options of framerate, video size, quality and codec (h263 and h264). I think FFmpeg is the best choise for this (if it is not so, please write a comment). I've managed to do everything I mentioned above with ffmpeg.exe using console. So I wish to know, can I include FFmpeg library into C# project (as a .lib or .dll) to use it instead of .exe, saving suitable functionality for my task? I'll be very grateful for any (...)