[MPlayer-users] Re: Problem with mencoder

Stefan Seyfried seife at gmane0305.slipkontur.de
Fri Aug 15 08:46:58 CEST 2003

D Richard Felker III <dalias at aerifal.cx> writes:

>> 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.

even for audio? I didnt know that. I can imagine that there are problems
with oac copy (codecs behaving differently ...) but what about pcm?
Shouldnt mplayer be able to maintain A-V sync there and later with lame?

> 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...

Well, since i'm in PAL land, i dont get many of these skipped/duplicated
frames, dont have problems with pulldown and other hassles ;-))

 Stefan Seyfried, seife at gmane0305.slipkontur.de

"If you want to travel around the world and be invited to speak at a lot of
 different places, just write a Unix operating system." -- [Linus Torvalds]

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