[MPlayer-users] Should vqscale be used for first pass?

[Jonathan Rogers]

Moritz Bunkus wrote:
> Tell us what the countquant.pl script outputs (it's in TOOLS). It'll
> show how often each quantizer was used.

Do you know why the manpage advocates using vqscale for the first of two 
passes? Obviously, this isn't how you do it, since that would make 
countquant.pl useless. When I've noticed PSNRs for the second pass, it's 
seemed that using vqscale for the first pass didn't do as well as using 
just vbitrate. Perhaps the manpage is misleading and should be changed. 
I think I've read that XviD does use a constant quantizer for the first 
pass, so perhaps that's where the confusion originated. Does anyone have 
an authoritative answer? A lot of lavcopts are still magic to me. I 
guess I need to start reading the source.

Jonathan Rogers