[MEncoder-users] NTSC VOB issues

[Phil Ehrens]

raregister at comcast.net wrote:
> > 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
> > 
> 
> Using lavcopts, it syncs nicely, no complaints, but the Xvid
> quality is SOOO much higher that I'd MUCH rather use that.

I suspect that whatever quality difference you are seeing is
only a single option away, perhaps some gaussian blur?

Phil