[FFmpeg-user] split audio/video and merge later gets async

[Carl Eugen Hoyos]

Frank Tetzel <s1445051 <at> mail.zih.tu-dresden.de> writes:

> Even if i don't process the audio file (except convert to wav). 
> Just splitting and merging gets out of sync.
> $ ffmpeg -i grab.mkv -vn -c:a pcm_s16le grab-aud.wav
> $ ffmpeg -i grab.mkv -i grab-aud.wav -map 0:0 -map 1:0 -c copy merge.mkv

Complete, uncut console output missing.

Audio in mkv probably has a delay which cannot be saved in wav, 
I don't think anything except finding out the delay and using 
it when remuxing (itsoffset) is possible.

Which audio filter is missing in FFmpeg?

Carl Eugen