[MEncoder-users] Audio loses sync reencoding

[Guillaume POIRIER]

Hi,

On 12/25/06, Ismael Valladolid Torres <ivalladolidt at terra.es> wrote:
> Trying to reencode a DivX movie at +1300 bps bitrate to a lower one so
> it fits a CD:
>
> $ mencoder -oac copy -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=700 in.avi -o out.avi
>
> The result is also a DivX (MPEG4) movie at 700 bps bitrate but
> unfortunately audio is out of sync.
>
> Is this normal? Should I use -oac whatever instead of -oac copy?
>
> Any ideas welcome.


Try different values of -mc, and/or try -noskip if mencoder says that
there are lots of skipped frames.

I tend not to trust MEncoder's muxing reliability myself, so I usually
use an external tool to mux and fix skip, using Avidemux, avimerge, or
mkvmerge.

Good luck!

Guillaume
-- 
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 -- Thomas Jefferson
(when interviewed about MPlayer ML flamewars)
http://www.brainyquote.com/quotes/quotes/t/thomasjeff157207.html