[MPlayer-users] Syncronization problem

[Giacomo Comes]

On Tue, Dec 21, 2004 at 10:09:56AM +0100, Reimar D?ffinger wrote:
> Hi,
> [...]
> > 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)
> 
> Isn't it possible to use -oac copy on the first pass, thus making it a bit faster?

There is a misunderstanding here.

With 3 pass what you usually do is:

Pass 1: audio encoding
Pass 2: video encoding
Pass 3: video encoding

With 2 pass what you usually do is:

Pass 1: audio+video encoding
Pass 2: audio+video encoding

What you are suggesting is:

Pass 1: audio encoding
Pass 2: video encoding
Pass 3: audio+video encoding

and it will not be faster then 2 pass.

Giacomo