[MPlayer-users] [bug?] Libavcodec mpeg4 sync

[christopher j bottaro]

don't you have to do the "pass 0" inorder to calculate the bitrate needed for 
a 700 mb cd?

-- christopher

On Friday 28 March 2003 10:30 am, D Richard Felker III wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>
> On Fri, Mar 28, 2003 at 02:21:14PM +0800, Michael Collard wrote:
> > [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> > Hiyas! After upgrading to RC5, ripping a DVD with mencoder in 2 pass
> > mode with libavcodec, the audio needs a delay of approx 300ms. RC3 did
> > not give me this problem as far as I am aware. Having to go back and
> > realign the movie after is just annoying.
> >
> > Command lines:
> >
> > mencoder -dvd 1 -dvd-device=/dev/scd0 -o frameno.avi -ovc frameno -oac
> > mp3lame -lameopts vbr=2
> >
> > mencoder -dvd 1 -dvd-device /dev/scd0 -o Movie.avi -oac copy -ovc lavc
> > -lavcopts vcodec=mpeg4:vhq:vbitrate=767 -vop scale -zoom -xy 512
> >
> > Any suggestions appreciated.
>
> I don't know about fixing your problem, but this whole setup is silly.
> This is not what I would call "2pass" encoding, since you're only
> doing one video pass.
>
> Perhaps the desync is caused by the fact that you're missing -ofps
> 23.976 (needed for most NTSC dvds). Also it seems that the "pass 0"
> for audio causes more trouble than it's worth, so try just encoding
> with 1pass mode or proper 2pass (-lavcopts vpass=1 then vpass=2 with
> no frameno mess).
>
> Rich
>
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