[MEncoder-users] NTSC VOB issues

[Phil Ehrens]

raregister at comcast.net wrote:
> Hey folks first post but not a total newbie.
> 
> I've gotten mencoder to work but I've got a small problem w/my encoding.
> 
> if I don't use -noskip the video syncs nicely when I mux it through VirtualdubMod  w/its AC3 file, but the film is... jerky.
> 
> When I use -noskip the jerkiness is GONE, the films is nice and smooth, but the framerate goes wacky.
> 
> ..... so I've played with -ofps and it works IF the frame rate in the vob doesn't change.
> 
> The problem is that on some movies it jumps from 29.97 at the begining to 23.97 for the full movie.
> 
> That of course blows my sync right out of the water.
> 
> Any tips/thoughts would be MUCH appreciated.

Hmm... I just do this, and the changing frame rate is handled
automagically by mencoder:

 mencoder -oac copy \
          -ovc lavc \
          -lavcopts vcodec=mpeg4:mbd=2:qprd:v4mv:vqscale=2:trell:vbitrate=2400 \
          -ofps 23.976 \
          -alang zh \
          -sid 0 \
          -o belching-tiger.avi dvd://1

Belching Tiger changed frame rate several times ;^)

You may not need the -alang and -sid options...

Two-pass version of same is here:

http://inferno.slug.org/cgi-bin/wiki?DvdToAvi