[FFmpeg-user] sync audio in a single file

Jeff Thompson jeff at thefirst.org
Mon Apr 7 17:54:58 CEST 2014

I have an avi file with duration 1 hour. The audio rate is out of sync 
and ends about 2 minutes before the end of the video. I used the ffmpeg 
-async option:

|ffmpeg -i unsynced.avi -i unsynced.avi -acodec adpcm_ms -vcodec copy -map 0:0 -map 1:1 -async 1000 synced.avi|

But the output audio is still out of sync. Am I using the ffmpeg command 
correctly to sync the audio with the video in the one input file?

- Jeff

More information about the ffmpeg-user mailing list