[MPlayer-users] Re: Problem with mencoder

[D Richard Felker III]

On Thu, Aug 14, 2003 at 03:24:36PM +0200, Stefan Seyfried wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> rcooley <rcooley at spamcop.net> writes:
> 
> > Stefan Seyfried wrote:
> >> It's time to remove 3pass encoding and instead provide a
>  
> > However, you lose the advantage of not having to re-encode the audio in 
> > the second pass.
> 
> just use "-oac copy" or "-oac pcm" in the first pass (which can go to
> /dev/null), so you also only need to encode audio once (in the second
> pass).

It would be nice if this were possible, but actually, because of
bugs/misbehavior in mencoder and/or lame, A/V sync will not come out
the same both times unless you use EXACTLY the same encoding options.
And that means the frame numbers and stats from pass 1 will be totally
bogus for pass 2, since different frames will be skipped/duplicated,
so quality will be much lower...

Rich