[MPlayer-users] qscale, 2-pass, and PSNR

Martin Collins martin at mkcollins.org
Fri Jun 4 03:08:51 CEST 2004


On Thu, 03 Jun 2004 18:36:19 -0400
Jason Tackaberry <tack at sault.org> wrote:

> > A question: what were the min, max and average quantisers in the
> > 2-pass run?
> 
> The defaults: vqmin=2 and vqmax=31.  According to the PSNR log, the
> highest quantizer that was used was 7, the lowest was 2, and the
> average quantizer for all 10000 frames was 2.9.

The quantizer is the second field in the PSNR log?
I used to use countquant.pl to measure this but that gets the quantizers
from divx2pass.log and the figures in there have been nonsense for some
time.

Martin




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