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

[Everett]

ok, I tried this.  still has the a/v sync problem.  

the a/v seems to be out of sync exactly the same every time, in 
other words, the out-of-sync encodes are in-sync, I think.  ;)

  

On Thursday 28 June 2007 16:27, Phil Ehrens wrote:
> Everett 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.
> >
> > I have exhaustively searched the documentation--  here are some
> > things that I tried:
> >
> > with and without -vf pullup,softskip,harddup,softpulldown, etc.
> > with and without -vf yadif
> > with and without -ofps 24000/1001, 30000/1001
> > I tried every combination of the above three strategies I could
> > think of: in other words, encoding as progressive.  encoding as
> > interlaced.  encoding as progressive with deinterlacing
> > filter.  encoding as mixed progressive/telecine. encoding as
> > mixed progressive/telecine with deinterlacing.  I realize that
> > not all of those options make sense, I wanted to try
> > everything.
> > (obsessed!  ;) )
> > I tried -ofps 25 to see if that would help.
> > I tried -mc 0 and -noskip (I am aware that -noskip wouldn't
> > have worked, I tried anyway (didn't work)).
> > I tried encoding first to -ovc lavc -lavcopts vcodec=ffv1 -oac
> > pcm just to see if encoding first to lossless video and audio
> > would sync the audio, then I could re-encode to compressed.
> >  (didn't work).
> > I used the -audio-delay option to sync up the first part of the
> > video, but then the rest of the video went steadily out of
> > sync.
> >
> > I have thought of re-muxing into mkv and using the -y (sync)
> > option to stretch out the audio, but that's going to take a lot
> > of trial and error and I don't want to deal with that.
> >  besides, that will only be a kludgy kind of solution, I would
> > much rather just get the a/v sync on the original encode.
> >
> > 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.
>
> Did you try this:
>
>  mencoder -oac copy -ovc copy -ofps 30000/1001 -o
> samurai-jack.avi dvd://1
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