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

christopher j bottaro cjb at cs.utexas.edu
Fri Apr 4 03:11:06 CEST 2003

On Friday 28 March 2003 10:30 am, D Richard Felker III wrote:
> 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).

1 pass or 2 pass with mencoder 0.90rc5 with no audio pass/frameno mess still 
produces avi's that are way outta sync for me.

mencoder -oac copy -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=1600:vpass=1 
-vop pp=0x20000 -dvd 1 -chapter 1-1  -o /dev/null -ofps 23.976

mencoder -oac mp3lame -lameopts abr:br=96 -ovc lavc -lavcopts 
vcodec=mpeg4:vhq:vbitrate=1600:vpass=2 -vop pp=0x20000 -dvd 1 -chapter 1-1  
-o test.avi -ofps 23.976

i get a few of these messages also:
demux_mpg: 3:2 TELECINE detected, enabling inverse telecine fx. FPS changed to 
demux_mpg: Progressive seq detected, leaving 3:2 TELECINE mode

guess its back to cvs 20021210 for me...=(

-- christopher

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