[MPlayer-users] Audio Lag and Index Problem

[Oliver Strutynski]

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On Sunday 19 January 2003 06:34, ras2 wrote:
> > mencoder -dvd 1 -alang en -o test1.avi -oac mp3lame -lameopts vbr=3:vol=8
> > \ - -ovc lavc -lavcopts
> > vcodec=mpeg4:vbitrate=1527:vhq:vqmin=2:keyint=10:vpass=2 \
> > vlelim=-4:vcelim=9:lumi_mask=0.05:dark_mask=0.01  -vop \
> > scale=720:336,crop=710:350:8:64 -ofps 23.976 -zoom -aspect 4:3
> >
> > Anything wrong here?
>
> If you have duplicated video frames, you will get audio desync if you
> use -ofps when you encode; when you captured/copied/whatever the original
> file, extra video frames were inserted to keep the audio in sync, so if
> you then try to re-encode the file with correct FPS value, the audio will
> lag.

But I did not copy the file from DVD. I am ripping "live" with -dvd 1. 

>
> > I noticed that mencoder showed far less "duplicate frame" messages (just
> > 2 and some skipped frames) when using the three-pass method.
>
> Not surprising. That should also be the case with a single pass with
> -ofps.

No, it isn't. When doing the one-pass encoding " -dvd 1 -ofps 23.976" I get 
tons of duplicate frames.

Oliver

- -- 
_____________________________________________________________________
 Oliver Strutynski                       oliver.strutynski at in.tum.de
                                                    olistrut at gmx.net
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