[FFmpeg-user] Video/Audio out of sync when converting from FLV to MP4

Carl Eugen Hoyos cehoyos at ag.or.at
Tue Apr 30 16:36:39 CEST 2013

Rob Desilets <rd <at> icalc.com> writes:

> When I convert it to MP4 using these flags:
> -c:v libx264 -crf 22 -preset slow -profile:v baseline 
> -level 30 -c:a libfaac -q:a 100 -r 30 -async 1
> The audio and video get out of sync.

Does this only happen with external libraries 
(libx264 and libfaac) or also with internal 
In any case, please provide your failing command 
line together with the complete, uncut console 

Carl Eugen

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