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Re: [MPlayer-users] Syncronization problem

To: mplayer-users@xxxxxxxxxxxx
Subject: Re: [MPlayer-users] Syncronization problem
From: Giacomo Comes <comes@xxxxxxxx>
Date: Tue, 21 Dec 2004 09:17:33 -0400
Delivered-to: itdp@localhost
Delivered-to: mplayer-users@mplayerhq.hu
In-reply-to: <Pine.LNX.4.61.0412210848160.2722@casa.fs.net>
References: <Pine.LNX.4.61.0412201913430.5728@casa.fs.net><20041220182035.GA17415@monopoli.naic.edu><Pine.LNX.4.61.0412210848160.2722@casa.fs.net>
User-agent: Mutt/1.4.1i 
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

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