[MPlayer-users] how to correct bad fps value?

[Chris Frederick]

Hi all,

I'm trying to fix a dvd rip that I have.  When I play the rip file the 
audio is way off sync.  mplayer says that the file is 29.97 fps, but if 
I play it with "-fps 24.344" it plays fine.  I've tried re-ripping the 
dvd without any success.

I've been trying to fix this by running mencoder to modify the frame 
rate, but every time I do it destroys the video quality.  Here's the 
command I'm trying to run:

mencoder -fps 24.344 -ofps 24.344 -oac copy -ovc copy -o fix.avi \
  -audiofile audio.mp3 badfps.avi

What am I doing wrong?  mencoder keeps reporting that it is skipping 
frames, but even if I add -noskip it keeps doing it.  I don't want 
mencoder to do anything to the frames, just change the rate.  Everywhere 
else I look to change the fps, it keeps the video length the same by 
adding/dropping frames, but I want to change the length and keep the 
frame count the same and just down the fps.  If mplayer can play it with 
just "-fps xxxx", shouldn't mencoder be able to do something similar, 
without distorting the video?

Thanks for your help,
Chris