[LAU] OT - syncing partially out of sync video and audio in existing files

[Philipp Überbacher]

Excerpts from Jeff Sandys's message of 2011-06-10 21:06:57 +0200:
> Hi,
> ...
> 
> I'd like to fix some videos that have partially out of sync
> video and audio, meaning that beginning at a certain point
> in the video the audio is suddenly out of sync by a couple
> of seconds. There's no constant change, the delay seems
> fixed once it's there.
> 
> I wonder how to fix such a thing. The files are xvid
> encoded videos and vbr mp3 audio inside avi containers.
> I thought it should be reasonably easy to cut and move the
> audio (re-encode if unavoidable, but I know it's in principle
> possible without) and put it back in a container, but I didn't
> manage.
> 
> Can someone recommend a program/workflow that would allow this?
> 
> I tried:
> - Avidemux: ...
> - openshot: ...
> - kino: ...
> - openmovieeditor: ...
> - cinelerra-cv: ...
> - pitivi: ...
> - kdenlive: ...
> 
> I thought it would be a simple task, really nothing fancy. Seems like I
> was wrong.
> 
> Regards,
> Philipp
> 
> Phillipp,
> I had a problem with out of sync audio using a camera that recorded
> using VBR.  Avidemux was able to fix this with Audio/Build VBR Time Map
>      http://www.avidemux.org/admWiki/doku.php?id=using:vbr_mp3
> 
> I can't move or stretch audio in Avidemux, but this time map function
> fixed my out of sync problems.
> -- Jeff

Thanks Jeff, avidemux did this when I tried it, and it didn't help. The
problem is most likely not due to vbr. Thanks anyway.