[MPlayer-users] Syncronization problem

[Giacomo Comes]

On Tue, Dec 21, 2004 at 08:50:14AM +0100, Fabio S. wrote:
> >Instead of 3 pass encoding try 2 pass (it's equivalent to 3 pass, just a 
> >little bit slower):
> >
> >mencoder video.avi -oac mp3lame -lameopts cbr -ovc lavc -lavcopts 
> >vcodec=mpeg4:vbitrate=1600:vpass=1:mbd=2 -o newvideo.avi
> >mencoder video.avi -oac mp3lame -lameopts cbr -ovc lavc -lavcopts 
> >vcodec=mpeg4:vbitrate=1600:vpass=2:mbd=2 -o newvideo.avi
> >(remove vhq because it is equivalent to mbd=1 and you have mbd=2 too)
> >
> >Does it help?
> 
> Yes, it helps: now it is correctly syncronized.
> 
> Thank you.
> 
> But what is the rationale behind this?

I know there is an explanation somewhere in the
mailing list archive, but I don't know it myself.
I have done myself 2 pass and 3 pass encoding and
I have always got good results.
So, I don't know when 3 pass is bad.

Giacomo