[MEncoder-users] impossible dvd encode? a/v sync problem

[Joey Parrish]

On 6/28/07, Everett <everettraygun at gmail.com> wrote:
> I have a dvd (samurai jack: season 1) that I would like to rip so
> that I can watch it on my computer. Eventually, I would like to
> rip it so that I can watch it on my ipod, but for now, I'd settle
> for any format/video codec/audio codec that had proper a/v sync.
>
> notes on the dvd: some of the titles are constant 30000/1001 fps,
> but several of them jump back and forth between 30000/1001 and
> 24000/1001. those are the ones that I can't get to sync no matter
> what.
>
> Has anyone worked this out? does anyone have any ideas? I have
> given up for now. The dvd plays with mplayer just fine, great in
> fact. I guess the constant framerate limitation of avi is the main
> problem? I have also tried to use the libavcodec mp4 muxing with
> bad results, including the i_certify_no_b_frames_etc. with
> bframes=0 on the encode. I don't know if mp4 has that limitation
> or not.

If I'm not mistaken, I've had no problem with such DVDs.  I saw the
list of odd things you tried, but did you try something simple?  Try
this:

mencoder -ovc lavc -oac copy -lavcopts vcodec=mpeg4 dvd://1 -o test.avi

Or:

mencoder -ovc lavc -oac mp3lame -lavcopts vcodec=mpeg4 dvd://1 -o test.avi

And for what it's worth, I find that -fps and -ofps always make me
regret using them.

--Joey