[MPlayer-users] 2 pass divx encoding from .VOB/dvd - Targeted filesize (bitrate) ends up way way wrong

[D Richard Felker III]

On Sun, Aug 20, 2000 at 04:52:29PM +0200, Arpi wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Hi,
> 
> > Also don't use -nosound, that will cause mencoder not to mess with a/v
> > sync, which could cause the frame numbers in lavc_stats.txt to be
> > totally wrong for the second pass!! Instead use -oac copy or -oac pcm
> > (doesn't matter since the output is going to the bitbucket anyway).
> 
> only -oac pcm or -oac mp3 will work, as -oac copy won't decode just like
> -nosound so it won't detect broken audio chunks or desync

Hm, are you sure? Whenever I use -oac copy, it still skips and/or
duplicates frames as usual. Anyway when writing to /dev/null, -oac pcm
is fine. Perhaps it would be nice to have -oac dummy to decode audio
(for preserving sync in first pass) but not write it to the output
file, for people who want to be able to watch the first pass file
(e.g. for comparing quality).

Rich