26 April

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

• 11:57
  FFmpeg macos install Reason: image not found - Joycon Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to install FFmpeg on my mac. When I do brew install ffmpeg --with-chromaprint --with-fdk-aac --with-fontconfig --with-freetype --with-frei0r --with-game-music-emu --with-libass --with-libbluray --with-libbs2b --with-libcaca --with-libgsm --with-libmodplug --with-librsvg --with-libsoxr --with-libssh --with-libvidstab --with-libvorbis --with-libvpx --with-opencore-amr --with-openh264 --with-openjpeg --with-openssl --with-opus --with-rtmpdump --with-rubberband --with-sdl2 --with-snappy --with-speex --with-tesseract --with-theora --with-tools --with-two-lame --with-wavpack (...)
• 10:57
  Single FFMpeg command to merge 2 audio with 1 video - YadavK Newest 'ffmpeg' Questions - Stack Overflow
  I have a requirement like i have to merge 2 audio with single video. I found lots of solutions but none of them provide just the single command for the requirement. Here is the solution for that : i sample_video.mp4 -i sample_audio1.mp3 -i sample_audio2.mp3 -filter_complex [1][2]amix=inputs=2[a] -map 0:v -map [a] -c:v copy Output.mp4 you can also set the audio range like 8sec - 20 sec then use the below command i sample_video.mp4 -i sample_audio1.mp3 -i -ss 8 -t 20 sample_audio2.mp3 -filter_complex [1][2]amix=inputs=2[a] -map 0:v -map [a] -c:v copy Output.mp4 the above sample will (...)
• 08:58
  Video capture using c++ Builder 10.3 and FFMPEG - Barry Andrews Newest 'ffmpeg' Questions - Stack Overflow
  I am looking for an example of how I can use FFMPEG in c++ builder to create an application to record from usb capture device and playback video. I have tried Mitov components and winsoft camera which use directshow but their capture performance is poor. I need to capture 1920x1080 at up to 60fps into a compressed format and play this back later at both normal speed and slow speed.
• 07:05
  Video and Audio stream in Python pipe to ffmpeg - Praveen P K Newest 'ffmpeg' Questions - Stack Overflow
  Raw video from Python pipe is converted to udp stream using FFMPEG is working correctly using following code: command = [ 'ffmpeg', '-y', # (optional) overwrite output file if it exists '-r', '25', # frames per second '-i', '-', # The imput comes from a pipe '-an', # Tells FFMPEG not to expect any audio '-r', '25', '-c:v', 'copy', '-f', 'mpegts', 'udp://ip:port' ] devl = open(os.devnull, 'w') file_name = '/tmp/file.txt' err1 = open(file_name, 'w') pipe = sp.Popen( command, stdin=sp.PIPE, stdout=devl, stderr=err1) But when audio stream also coming in same python pipe, how i should change (...)
• 07:45
  Trying to send commands to ffmpeg via RedirectStandardInput by using a button - user1888932 Newest 'ffmpeg' Questions - Stack Overflow
  I'm making a program which opens up ffmpeg and runs a job which then the user can quit the job by pressing a button. I'm getting "An async read operation has already been started on the stream." on "BeginOutputReadLine" when I try to quit the job a second time. If I try putting "Dim p3 As New Process" inside "test_run()" I get: "StandardIn has not been redirected." on "StandardInput.WriteLine" if I attempt to quit the job once. This is a working sample of my code. Imports System.IO Public Class Form1 Dim quote As String = """" Dim p3 As New Process Function generate_batch(aargs As (...)
• 05:19
  Using ffmpeg to overlay dvdsub - ib11 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to overlay a dvdsub file pair (*.idx + *.sub) to a video file. This is the batch script with the command line I am trying to use: ⓐecho off set srcVidFile1="myvideo.mov" set srcSubFile=mysub.sub set srcIdxFile=mysub.idx set destFile=D:\\testsub.mp4 ffmpeg.exe -i %srcVidFile1% -i %srcSubFile% -i %srcIdxFile% -filter_complex "[0:v][1:s]overlay" -c:s dvdsub -c:v libx264 -crf 24 -c:a aac -b:a 160K -ar 48K -strict -2 -y %destFile% This however only accepts 720x576 VOBsub files. And also the color gets inverted. My video however is 1080p and do have a 1920x1080 VOBsub file pair, (...)
• 04:46
  Asking ffmpeg to extract frames at the original frame rate [closed] - Amelio Vazquez-Reina Newest 'ffmpeg' Questions - Stack Overflow
  On the FFmpeg documentation (here, and here) I read that, by default, FFmpeg chooses to extract frames at 25 frames per second (otherwise you can specify a framerate with the -r option) My problem is that I have a folder with dozens of videos, each of them recorded at different frame rates, so my question is: Is there a way to ask FFmpeg to extract frames from a video at the "native" frame rate (i.e. the original frame rate at which the video was recorded)? In case it matters, I am working with MP4 (...) -- here, here

25 April

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

• 23:23
  Making a thumbnail using fluent-ffmpeg returns ffprobe - user10204157 Newest 'ffmpeg' Questions - Stack Overflow
  I am getting the following error: Error: ffprobe exited with code 1 ffprobe version 4.1.1 Copyright (c) 2007-2019 the FFmpeg developers built with gcc 8.2.1 (GCC) 20190212 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack (...)
• 23:03
  How to stop ffmpeg from manipulating mp3 metadata? - he rambled Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg to change bitrate of my mp3 files. It works well, but one thing is very frustrating. ffmpeg automatically changes some of metadata fields. Specifically it converts ID3v2.3 to ID3v2.4, and it does it incorrectly. For example, it writes TYER field that actually does not exist in ID3v2.4. But the most frustrating thing is, it converts USLT field to lyrics-LANGCODE(like lyrics-eng). Most of music players does not recognise this tag! I don't want ffmpeg to mess up with metadata fields. I just want it to change bitrate. Is there anyway to tell ffmpeg that it should not touch (...)

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 18:57
  avcodec/jpeg2000dec: Fix return type of get_plt() - Michael Niedermayer git.videolan.org Git - ffmpeg.git/rss log
  avcodec/jpeg2000dec: Fix return type of get_plt() Found-by: Andreas Rheinhardt <andreas.rheinhardtⓐgmail.com> Signed-off-by: Michael Niedermayer <michaelⓐniedermayer.cc> [DH] libavcodec/jpeg2000dec.c

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

• 20:11
  AAC stream has errors, but I can't use ffmpeg to show me errors - Gyula Soós Newest 'ffmpeg' Questions - Stack Overflow
  I saw some results here on stack related to this issue, but I just can't make it to work for my life. What is wrong with this command? How was I supposed to run it? ffmpeg -err_detect explode http://ohnewerbung.ice.infomaniak.ch/radiobasilisk-64-0.aac This gives the error: Output file #0 does not contain any stream I'm running ffmpeg on a mac if it makes any difference. :/
• 19:36
  ffmpeg arugments with flutter - ebg11 Newest 'ffmpeg' Questions - Stack Overflow
  I have been trying to use ffmpeg to compress a videos file size so I can upload to firebase storage. I've ran the code on windows cmd and it works. But when i run it on flutter the quality of the video is terrible. I have also specified many values for the -crf param but the output videos quality and file size are always the same. int processSuccess = await _flutterFFmpeg.execute(["-i", "file1.mp4", "-crf", "23", "fileoutput.mp4"]); I had to change the package to video as the execution would fail on the default import as it could not find the -crf param. flutter_ffmpeg: git: url: (...) -- https://github.com/tanersener/flutter-ffmpeg
• 19:18
  ffmpeg - executing 2 or more command in one time - Happy Man Newest 'ffmpeg' Questions - Stack Overflow
  I have 2 ffmpeg commands, I execute them respectively, they work, but I want to execute them in one time and one command. How to do that? ffmpeg -i 1.mp4 -i logo.png -filter_complex "overlay=main_w-overlay_w-20:20" -codec:a copy 2.mp4 ffmpeg -i 2.mp4 -i picture.png -filter_complex "overlay=10:10" -codec:a copy 3.mp4
• 18:58
  Processing a video stream over websocket with opencv - Patrick Connors Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to stream video over a websocket and process it server-side with Node.JS. The client is reading from a video file (.mp4) and sending it over the web socket via a stream object. However, I'm having trouble extracting frames from the stream at the server so it can be processed by opencv. Do I need to break the video up into frames and stream each individual frame? What format can opencv most easily process in real time? The end goal here is to enable opencv to process each frame of a video (in real time) that is being received by the server. Think I'm having some trouble (...)
• 18:46
  Trying to concatenate multiple videos with multiple audio streams using ffmpeg - Toto Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to concatenate 3 mp4 videos, each contains 3 audio streams using ffmpeg, since I couldn't merge them with other software because of differences in the codecs private data. Since the files have different codecs I'm trying to use the concat video filter but I can't seem to get it to work. The output turns out to be an unplayable file. I'm trying to specify the input files, and every media stream, then telling the software to concatenate it and copy it to the output file. ffmpeg -i A.mp4 -i B.mp4 -i C.mp4 -filter_complex '[0:0] [0:1] [0:2] [0:3] [1:0] [1:1] [1:2] [1:3] [2:0] (...)
• 18:25
  Can ffmpeg show a progress bar? - Pawan Rao Newest 'ffmpeg' Questions - Stack Overflow
  I am converting a .avi file to .flv file using ffmpeg. As it takes a long time to convert a file I would like to display a progress bar. Can someone please guide me on how to go about the same. I know that ffmpeg somehow has to output the progress in a text file and I have to read it using ajax calls. But how do I get ffmpeg to output the progress to the text file? Thank you very much.
• 15:45
  Get scene changes for cropped portion of video in a single command - DeWil Newest 'ffmpeg' Questions - Stack Overflow
  I would like to do something like this: 'ffmpeg -i "video.ts" -vf "crop=768:126:0:400 , select=gt(scene\\\\,0.06) " -vsync vfr -f null /dev/null -loglevel debug 2>&1 | grep select:1' However this gives me wrong results as compared to cropping the video in the first command ffmpeg -i "video.ts" -vf "crop=768:126:0:400" cropped.ts and then taking out the scene changes in the second command. ffmpeg -i "cropped.ts" -vf "select=gt(scene\\\\,0.06) " -vsync vfr -f null /dev/null -loglevel debug 2>&1 | grep select:1' Is there a single line command which could crop a particular portion of (...)
• 14:55
  How to find the time of an audio clip within longer clip Python - Kuzon Newest 'ffmpeg' Questions - Stack Overflow
  I don't know what this would be called. I am trying to find the timing a clip within a longer clip using python. There is a jingle that is played, it is the same file played every time. I want to be able to find the exact position of this jingle in a longer audio clip so I can automatically trim an audio file to right after that jingle. Is this possible in Python?
• 14:21
  Master playlist generate points to only one resolution among multiple - Parthib Dutta Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert one mp4 movie to multiple bitrate HLS . The individual resolutions are generating fine with their own playlists . But the master playlist includes only one resolution . ffmpeg -hide_banner -re -i video.mp4 -master_pl_name master.m3u8 ^ -vf scale=w=640:h=-2 -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k -hls_segment_filename D:\\xampp\\htdocs\\streaming-demo\\360p_%%03d.ts D:\\xampp\\htdocs\\streaming-demo\\360p_%v.m3u8 ^ -vf scale=w=842:h=-2 -c:a aac -ar 48000 -c:v h264 (...)
• 13:32
  JSON Animation exported as Video mpeg - Tori Huang Newest 'ffmpeg' Questions - Stack Overflow
  I have a json animation created in AfterEffects, exported with BodyMovin. https://github.com/bodymovin/bodymovin Is there any way to take this json file and programmatically transform it in to a video? Basically I am trying to create a JibJab style video, where a user can input a photo of their face and our app will take that face and place it over an animation. I need to transform that animation into a video file that can be saved to the user's phone. Maybe with (...) -- https://github.com/bodymovin/bodymovin
• 12:28
  Unable to encode/decode from GPU - Ruben Cabrera Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to decode and encode a video streaming from a camera and process the frames in order to apply some filters. I'm able to decode and encode through CPU but I'm not capable to change it to make this process through the GPU. This is how I create the encoding codec (which is the function that MUST to be performed on GPU) encodingCodec = avcodec_find_encoder_by_name("h264_cuvid"); if (!encodingCodec) fprintf(stderr, "Codec not found enc\\n"); return; enc_ctx = avcodec_alloc_context3(encodingCodec); if (!enc_ctx) fprintf(stderr, "Could not allocate video codec context enc\\n"); (...)
• 11:43
  Can ffmpeg parse from a specific position in a file? - Treper Newest 'ffmpeg' Questions - Stack Overflow
  I am uploading a video using a form and want to parse the video info from a uploaded temporary file. The temporary file contains some form information at the start of the file and the remain is video bytes. Can ffmpeg parse the file from the position where the video bytes start?How? Many thanks!
• 09:04
  Nvidia Nvenc Video Conversion from mxf to mp4 getting error for multiple streams inside - Mesut Can Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert a video that have multiple video streams and one audio stream from mxf format to mp4 format and getting an error. How can i solve this problem? Thank you. E:\\video>ffmpeg -loglevel error -y -i E:\\video\\19_12_2018\\Files\\MEDIA\\media_data.mxf -map 0 -c:v h264_nvenc -acodec copy nvidia_output.mp4 [h264_nvenc ⓐ 0000020b30c86e80] OpenEncodeSessionEx failed: out of memory (10) [h264_nvenc ⓐ 0000020b30c86e80] No NVENC capable devices found Error initializing output stream 0:2 -- Error while opening encoder for output stream #0:2 - maybe incorrect parameters such as (...)
• 08:20
  Converting and Compressing a Video with FFmpeg - Supercoder54551 Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFmpeg to convert and compress a video. Everything converts/compresses fine, but my video has no sound when I try to play it on a mobile device. But it has sound when I play it on a desktop. I don't know if this has to do with the codec that I am using, I don't know. Can someone help me? I appreciate it. Thank you. The format that I am using in FFmpeg: $request->video->move(public_path('/app'), $filename); $name_file=uniqid().'intro_video.mp4'; $ffp=FFMpeg::open($filename) ->addFilter(function ($filters) $filters->resize(new \\FFMpeg\\Coordinate\\Dimension(640, 480)); ) (...)
• 05:14
  Merge video and audio with ffmpeg. Loop the video while audio is not over - fstephany Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to merge an audio file with a video file. I have two options: Have a very small video file (e.g., 10 seconds) that loop while the audio file is not over. Have a very long video file (longer than any of my audio file) on which I can attach the audio file. I would like to cut the video when the audio is finished. I've using the latter with the -t option of ffmpeg. It means I have to get the duration of the audio file to feed it into ffmpeg. Is it possible to avoid this step ? Any pointer for the first solution (...)
• 04:21
  Why ffmpeg get frames is faster (10x) with -vf fps=1 than -r 1 - ideoutrea Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg shot frames of a video why with flag -vf fps=1 flag is 10x faster than flag -r 1 ? i have seen the help doc, but can't figure out why. Thanks advanced ! -vf filter_graph set video filters -r rate set frame rate (Hz value, fraction or abbreviation) time ffmpeg -i 1198847500.mp4 -r 1 out/image_%03d.jpg # 10x slower time ffmpeg -i 1198847500.mp4 -vf fps=1 -y out/image_%03d.jpg # 10x faster

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 05:39
  Révision 24295: [Salvatore] [source:spip/ecrire/lang/ ecrire] Export depuis http://trad.spip.net - salvatoreⓐrezo.net Revisions : SPIP
  La langue 'ay' devrait être supprimée car trop peu traduite (22.66 %) La langue 'he' devrait être supprimée car trop peu traduite (43.35 %)

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

• 02:32
  Android Media player by FFmpeg2.3.3 and SDL2-2.0.3 has a error when SDL_init().The error is about SDL_main.h - Hanamaki Newest 'ffmpeg' Questions - Stack Overflow
  I use FFmpeg2.3.3 and SDL2-2.0.3 to develop an Android video player.I built the .apk success,but when I ran it,it's an error at SDL_init().I got message by SDL_error().The message was: SDL_Init(14144): Application didn't initialize properly, did you include SDL_main.h in the file containing your main() function? but I have #include "SDL_main.h" in the source.