17 février

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

• 08:05
  FFmpeg: Image scrolling increase quality video - Dinh Quang Khang Newest 'ffmpeg' Questions - Stack Overflow
  I'm creating a video scroll this image. Image input here and my code ffmpeg -loop 1 -t 61 -i 0.jpg -filter_complex "color=white:s=1280x720[bg];[bg][0]overlay=y=-'t*120':shortest=1[video]" -r 200/1 -preset ultrafast -map [video] "D:\\FFMPEG\\output.mp4" Here is result But output video is jerky although I set the frame rate at 200. I think the problem here overlay=y=-'t*120' -- Image input here, Here is result
• 05:54
  Create video scroll image with ffmpeg - Dinh Quang Khang Newest 'ffmpeg' Questions - Stack Overflow
  I am creating a video scroll vertical image with ffmpeg. But the video is very bad. Although I set the frame rate at 200, it is jerky. My video at YouTube ffmpeg -i "D:\\FFMPEG\\source.jpg" -i "D:\\FFMPEG\\logo.png" -i "D:\\FFMPEG\\audio.mp3" -f lavfi -i color=c=white:s=1280x720:d=41 -f lavfi -i color=c=white:s=1280x720 -loop 1 -filter_complex "[2:a]afifo[audio];[4:v][0:v]vstack=inputs=2[source];[3:v][source]overlay=shortest=1:y='-(t)*200'[source_video];[source_video][1:v]overlay=39:39[video]" -strict very -preset ultrafast -t 00:00:41 -vcodec libx264 -r 200/1 -map [video] -map [audio] (...) -- My video at YouTube

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

• 06:58
  doc/fftools-common-opts: add example for codec option stream specifiers - Gyan Doshi git.videolan.org Git - ffmpeg.git/rss log
  doc/fftools-common-opts: add example for codec option stream specifiers [DH] doc/fftools-common-opts.texi

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

• 04:59
  OCI runtime exec failed: exec failed: (...) executable file not found in $PATH": unknown - Uğur Kaya Newest 'ffmpeg' Questions - Stack Overflow
  I have dockerized an app which has ffmpeg installed in it via libav-tools. The app launches without problem, yet the problem occured when fluent-ffmpeg npm module tried to execute ffmpeg command, which was not found. When I wanted to check the version of the ffmpeg and the linux distro set up in the image, I used sudo docker exec -it c44f29d30753 "lsb_release -a" command, but it gave the following error: OCI runtime exec failed: exec failed: container_linux.go:296: starting container process caused "exec: \\"lsb_release -a\\": executable file not found in $PATH": unknown Then I realized (...)
• 03:43
  A query on ffmpeg's DASH muxer and setting timeShiftBufferDepth values in MPEG-DASH Media Presentation Description (MPD) files - 林正浩 Newest 'ffmpeg' Questions - Stack Overflow
  The documentation for the webm_dash_manifest muxer mentions the time_shift_buffer_depth option, defined as "Smallest time (in seconds) shifting buffer for which any Representation is guaranteed to be available. " What's the equivalent option/setting for the same in the dash muxer (,if implemented) ? Documentation for the webm_dash_manifest muxer -- dash, Documentation for the webm_dash_manifest muxer
• 01:14
  ffmpeg command problem to capture VHS video - خوشگل چاپار Newest 'ffmpeg' Questions - Stack Overflow
  For capturing from VHS devices by ffmpeg, I entered following command in win10 PowerShell: ffmpeg -f dshow -list_options true -i video="713x BDA Analog Capture" The result is: DirectShow video device options (from video devices) [dshow ⓐ 000001e1ac6f9d80] Pin "Capture" (alternative pin name "2") [dshow ⓐ 000001e1ac6f9d80] pixel_format=yuyv422 min s=160x120 fps=2 max s=768x576 fps=29.97 [dshow ⓐ 000001e1ac6f9d80] pixel_format=yuyv422 min s=160x120 fps=2 max s=768x576 fps=29.97 [dshow ⓐ 000001e1ac6f9d80] pixel_format=uyvy422 min s=160x120 fps=2 max s=768x576 fps=29.97 [dshow ⓐ (...)
• 01:01
  RTSP streaming on Android client using FFMpeg - rurtle Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a hobby project the goal for which is to develop an Android application capable of streaming live feeds captured through web cams in a LAN setting using FFMpeg as the underlying engine. So far, I did the following - A. Compiling and generating FFMpeg related libraries for the following releases - FFMpeg version: 2.0 NDK version: r8e & r9 Android Platform version: android-16 & android-18thisthisthisthis Toolchain version: 4.6 & 4.8 Platform built on: Fedora 18 (x86_64) B. Creating the files Android.mk & Application.mk in appropriate path. However, when (...) -- this
• 00:36
  Create video scroll image - Dinh Quang Khang Newest 'ffmpeg' Questions - Stack Overflow
  I am creating video scroll vertical image with ffmpeg. But video is very bad. Although I set frame rate is 200, it is jerky. My video in youtube i "D:\\FFMPEG\\source.jpg" -i "D:\\FFMPEG\\logo.png" -i "D:\\FFMPEG\\audio.mp3" -f lavfi -i color=c=white:s=1280x720:d=41 -f lavfi -i color=c=white:s=1280x720 -loop 1 -filter_complex "[2:a]afifo[audio];[4:v][0:v]vstack=inputs=2[source];[3:v][source]overlay=shortest=1:y='-(t)*200'[source_video];[source_video][1:v]overlay=39:39[video]" -strict very -preset ultrafast -t 00:00:41 -vcodec libx264 -r 200/1 -map [video] -map [audio] (...) -- My video in youtube
• 00:31
  Rendering YUV420P ffmpeg decoded images on QT with OpenGL, only see black screen - Lucas Zanella Newest 'ffmpeg' Questions - Stack Overflow
  I've found this QT OpenGL Widget which should render a 420PYUV image on screen. I'm feeding a ffmpeg decoded buffer into its paintGL() function but I see nothing. Neither noises or correct images, only a black screen. I'm trying to understand why. I want to exclude the possibilities of other things being wrong, but I need to be sure first that my code will produce anything. I std::couted some bytes from the ffmpeg just to see if they were arriving and they were. So I should see at least some noise. Can you see anything wrong with my code that wouldn't make it able to render images on (...) -- https://github.com/lucaszanella/orwell/tree/bbd74e42bd42df685bacc5d51cacbee3a178689f

16 février

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

• 20:18
  lavc/libgsmenc: Force mono and use 13k as default bitrate. - Carl Eugen Hoyos git.videolan.org Git - ffmpeg.git/rss log
  lavc/libgsmenc: Force mono and use 13k as default bitrate. [DH] libavcodec/libgsmenc.c

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

• 19:34
  Insert picture into an mp4 video, probably using ffmpeg - vivanov Newest 'ffmpeg' Questions - Stack Overflow
  I need to insert an image into a video of mp4 format. The image has smaller dimensions than the video, will appear after the video starts, say, after a minute and a half at certain x, y coordinates of the video frame, will stay on (full opacity) for some time and then will disappear before the video finishes. It would also be good if the image "fades in" / "fades out" when appearing / disappearing from the video. I would like to do that using the latest ffmpeg 4.1.1, although I am also open in using other opensource programs that run under linux if it would be achieved easier. I have (...)

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

• 19:40
  avcodec/version: Bump micro-version for nvdec/cuviddec changes - Philip Langdale git.videolan.org Git - ffmpeg.git/rss log
  avcodec/version: Bump micro-version for nvdec/cuviddec changes I forgot to add the version bump and changelog within the changes. [DH] Changelog [DH] libavcodec/version.h

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

• 19:01
  ffmpeg / avconv on ubuntu invalid data found when processing input - user3453357 Newest 'ffmpeg' Questions - Stack Overflow
  I have a .mp4 (h264) file on my ubuntu and try to rotate it using avconv (or ffmpeg, the result is the same). Actually, whatever action I'm trying to do with the file I get the "filename: invalid data found when processing input" The interesting thing is when I try to rotate the same file using ffmpeg library on windows, it runs smoothly. Below is the actual command that runs on windows, but doesn't run on ubuntu ffmpeg -i inputFile.mp4 -vf transpose=1 outputFile.mp4 Any help is appreciated, Thank you (...)
• 16:51
  First TS file is the biggest: ffmpeg mp4 to hls - Sunny TheBlue Newest 'ffmpeg' Questions - Stack Overflow
  While converting mp4 to hls, ffmpeg makes the 0.ts file the biggest comparing to others. How to fix it? This is running on a Linux server, running Debian 9, FFMPEG 3.2.12-1~deb9u1. $ ffmpeg -i input.mp4 -hide_banner -loglevel error -c copy -f hls -hls_time 7 -hls_list_size 0 -hls_segment_size 5000000 output.m3u8 I expect to get all the *.ts files to be less than 8MB.
• 15:58
  How to add custom thumbnail to a .mp4 file using ffmpeg - cooder_one Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to get a command which adds a .png or .jpeg image as a thumbnail to a video using ffmpeg in C#.net. Everywhere I searched, it explains how to get a frame from inside a video while I want to use a specific image (e.g: A logo file) on video/Bunch of videos. This is what i Got so far, and it's not working. It's just removing the Default Thumbnail. ffmpeg -i INPUT.mp4 -i IMAGE.png -acodec copy -vcodec copy -map 0 -map 1:0 OUTPUT.mp4 Is this even possible using ffmpeg. If yes, then please guide me towards the right (...)

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

• 16:35
  Anomalie #4291: #INFO_INTRODUCTION ne fonctionne pas - tcharlss (*´_ゝ｀) Revisions : SPIP
  Hop : https://git.spip.net/SPIP/spip/pulls/5

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

• 13:59
  Android : Show quick preview (live) before exporting FFmpeg Video - akash varlani Newest 'ffmpeg' Questions - Stack Overflow
  Basically I am developing a video editing app that lets user choose some of their images and create video slide show with music. I am using FFMPEG to generate video slide show from images but the problem is I can only show preview of the video after executing FFMPEG command. Is googled so many blogs and all and I know there is a possible way available to display preview of the output. Check below image from reference app. I am developing something similar to this app. There is an option to replace the image in video. This app displays instant preview once I change the image. Here is (...) -- , reference app, http://androidwarzone.blogspot.com/2011/12/ffmpeg4android.html
• 14:51
  Is there any control property to fix video playback speed problem when using ffmpeg to decode in Qt platform? - SoloWang Newest 'ffmpeg' Questions - Stack Overflow
  I want to play local video file in Qt platform using ffmpeg to decode.Everything is OK except that play speed is as twice as normal. The first thing I think about is that there must be a sampling frequency involved.But to be a new to ffmpeg,I don't know how to fix this problem. Above is my code to read frame,is anyone can tell me what's wrong with the code ? void VideoThread::run() m_pInFmtCtx = avformat_alloc_context(); //ini struct char path[] = "d:/test.mp4"; // open specific file if(avformat_open_input(&m_pInFmtCtx, *path, NULL, NULL)) qDebug()nb_streams; i++) (...)
• 11:42
  av_interleaved_write_frame(): Connection reset by peer youtube. - Hasan Newest 'ffmpeg' Questions - Stack Overflow
  i want to live stream to youtube with ffmpeg but i take error " av_interleaved_write_frame(): Connection reset by peer". i send stream with FMLE its works nice. ffmpeg -re -i /mnt/windows/21.mpg -r 30 -s 854x480 -c:v libx264 -c:a libfdk_aac -f mpegts "rtmp://a.rtmp.youtube.com/live2/hasanbagcaci.3s3v-pkwx-g64b-5zgz" -force_key_frames "expr:gte(t,n_forced*1)" thanks for helping
• 10:15
  Can not hear audio when concatenate some mp4 files using FFMPEG [duplicate] - Pimager Newest 'ffmpeg' Questions - Stack Overflow
  This question already has an answer here: How to add a new audio (not mixing) into a video using ffmpeg? 6 answers I need to concatenate some MP4 files. Only one of them has audio. The other ones hasn't. MyList.txt contains: file1.mp4 without audio and 5s length File2.mp4 without audio and 5s length File3.mp4 without audio and 5s length File4.mp4 with audio and Ns length I need an output that cotains the 4 mp4 files and when file4.mp4 starts I want to hear its audio. If I set the file4.mp4 as the first video to concat, the output video has audio, but If I set the file4.mp4 in another (...)
• 04:49
  Casting a tuple of pointers to a pointer of pointers - carlossless Newest 'ffmpeg' Questions - Stack Overflow
  I have piece of C code: #define AV_NUM_DATA_POINTERS 8 uint8_t *data[AV_NUM_DATA_POINTERS]; In the swift generated interface this looks like: var data: (UnsafeMutablePointer?, UnsafeMutablePointer?, UnsafeMutablePointer?, UnsafeMutablePointer?, UnsafeMutablePointer?, UnsafeMutablePointer?, UnsafeMutablePointer?, UnsafeMutablePointer?) There's a function that needs this data variable. It's representation in C is as follows: int sws_scale(..., const uint8_t *const srcSlice[], ...); However swift produces the following signature: func sws_scale(..., _ srcSlice: UnsafePointer?>!, ...) -> (...)
• 00:06
  convert two channels into a single channel left or right with ffmpeg - kutlus Newest 'ffmpeg' Questions - Stack Overflow
  I have some .wav files and I would like to convert their frequency (fs) and number of channels (nchannels). I am using ffmpeg on a jupyter notebook, python3.6. I used the following command and it works. cmd= 'ffmpeg -i %s -ar %d -ac %d %s.wav'%(filepath,fs,nchannel,wavfilename) os.system(cmd) However, when converting two channels into a single channel, I just want ffmpeg takes only left (or right) channel instead of an average of two signal? If I use map channel as follow would that be correct? This creates wav files but I am not sure if only one channel is taken. 'ffmpeg -i %s -ar %d (...)