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macos - How to interleave audio video in ffmpeg library ...
https://stackoverflow.com/questions/12142562/how-to-interleave-audio-video-in-ffmpeg-library
Show activity on this post. I am using ffmpeg to write an .avi file. I have two streams, one for audio and other for video. fps of video varies from 5 - 15 and samples per second of audio varies from 60 - 80. I am using av_interleaved_write_frame () to write the file. but it is too time consuming.
use ffmpeg to convert interleaved raw yuv/pcm to ...
https://video.stackexchange.com/questions/27518/use-ffmpeg-to-convert-interleaved-raw-yuv-pcm-to-compressed
I'm always impressed how smart FFmpeg has been designed so giving this a go. Can I use FFmpeg to convert part of a file to a compressed video file w/audio? The file I have consists of YUV420 frames interleaved with (floating point) audio PCM. So raw video & audio. I would like to convert part of it, so would want to give an offset into the file.
#6368 (audio_preload broken) – FFmpeg
https://trac.ffmpeg.org/ticket/6368
When audio_preload option is set output media stream a/v interleaving is broken because of "wrong sign issue" in interleave_compare_dts. I'm willing to provide patch solving this issue and also enabling audio stream shift in both directions (currently audio_preload is 0-int_max).
FFmpeg Formats Documentation
https://ffmpeg.org/ffmpeg-formats.html
You can select the output format of each frame with ffmpeg by specifying the audio and video codec and format. For example to compute the CRC of the input audio converted to PCM unsigned 8-bit and the input video converted to MPEG-2 video, use the command: ffmpeg -i INPUT -c:a pcm_u8 -c:v mpeg2video -f crc -.
Second audio track marked as default after copy - FFmpeg
https://trac.ffmpeg.org/ticket/4334
Now, I want to change the order of the audio tracks so that the first track will be german and maked as default and the second will be english. And I also want to set the language meta data to "ger" and "eng". I execute the following: c:\Temp>ffmpeg.exe -i Test.mp4 -map 0:0 -map 0:2 -map 0:1 -c copy -metadata:s:a:0 language=ger -metadata:s:a:1 ...
FFmpeg Filters Documentation
https://ffmpeg.org/ffmpeg-filters.html
Specify the minimum total duration in the output audio stream. See (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual for the accepted syntax. Used only if set to non-negative value. If the value is longer than the input audio length, silence is added to the end, until the value is reached.
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