[MEncoder-users] AC3 and Strange Video Playback

Giacomo Comes comes at naic.edu
Thu Dec 20 15:29:46 CET 2007

On Thu, Dec 20, 2007 at 01:19:12PM -0000, Nigel Arnold wrote:
> Hello
> I'm getting a problem creating any MPEG4 AVI with any AC3 audio track.
> I've tried RC2 and also a 25088 build as provided by Sherypa
> I''ve stripped back to a very basic bare command line,
> mencoder dvd://1 -dvd-device R:\  -oac lavc  -ovc lavc -lavcopts
> vcodec=mpeg4:vbitrate=1024:acodec=ac3:abitrate=192  -ofps
> 24000/1001 -Chapter 03-03  -o "AC3 Test.avi"
> The resulting .avi file -
> 1. The video plays about 2-3 times faster than speed than normal (like a
> Fast forward) in VLC, and WMP
> 2. The video is not seekable, as soon as I position in VLC, the video ends,
> in WMP If i seek, the video stops, audio still plays and takes about 10
> minutes for the video / audio to start playing again.
> This appears to be only related to AC3, as if I choose libmp3lame or
> libfaac, the video's are fine.
> I've tried the above command with a much earlier build 21190 and it works
> fine. the resulting video file plays fine in VLC, WMP and MPlayer
> Any Ideas
> Thx in advance

It a old bug.
See http://lists.mplayerhq.hu/pipermail/mencoder-users/2007-December/007644.html


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