[MPlayer-users] progressive desynchronisation

[Florin Andrei]

I have a collection of VOBs ripped from an NTSC (zone 1) DVD a while ago
with a different program. These VOBs can be played without any problems
in Mplayer and Xine.
I tried to convert them to DivX using mencoder. The commands used were:

cat ../vob/001/* | mencoder -fps 29.97 -ofps 23.976 -ovc frameno \
    -o frameno.avi -oac mp3lame -lameopts vbr=0:br=128:aq=0 -
cat ../vob/001/* | mencoder -fps 29.97 -ofps 23.976 \
    -vop scale=400:304 -sws 2 -ovc divx4 -pass 1 \
    -divx4opts br=852:q=5 -oac copy -o movie.avi -
cat ../vob/001/* | mencoder -fps 29.97 -ofps 23.976 \
    -vop scale=400:304 -sws 2 -ovc divx4 -pass 2 \
    -divx4opts br=852:q=5 -oac copy -o movie.avi -

The problem is, the resulting AVI has the sound progressively
desynchronised from the image. It starts pretty well synchronised, but
then it gets worse and worse. Towards the end, it's a few seconds
difference.
I noticed this problem when playing the AVI in Mplayer and Xine.
It does not matter if i let the AVI play without interruption, or if i
skip to the middle or to the end; i can even start the media player,
skip immediately close to the end using the cursor, and let it play from
there. No matter what, the results are exactly the same.

I don't believe the problem is in Mplayer or Xine, because the symptoms
are exactly the same, and neither one of these players have any problems
with DivX files created with other applications.

Is this a known problem? What's the solution?

-- 
Florin Andrei

http://florin.myip.org/