[MEncoder-users] new doom9 codec comparission

Dominik 'Rathann' Mierzejewski dominik at rangers.eu.org
Wed Dec 7 20:34:24 CET 2005

On Wednesday, 07 December 2005 at 09:22, Corey Hickey wrote:
> Here is my semi-final mpeg-4 encoding line for Doom9.
> for i in 1:turbo 2 ; do
>   mencoder matrix.vob -aid 128 -oac copy \
> -vf crop=718:356:0:60,scale=640:272 -sws 9 -ovc lavc \
> -lavcopts vcodec=mpeg4:vbitrate=581:mbd=2:mv0:trell:cbp:\
> precmp=2:cmp=2:subcmp=2:predia=2:dia=2:preme=2:v4mv:\
> last_pred=2:vqcomp=0.6:vmax_b_frames=2:vpass=$i \
> -ofps 24000/1001
> done
> After a couple dozen full encoding tests and numerous partial ones, the
> best result I have is little different from the "Very high quality"
> suggestion in the mplayer docs. Differences are:
> ----docs --------mine---------------reason-----------
> last_pred=3    last_pred=2   slower, no difference
> vb_strategy=1  <default>     lower PSNR, worse quality
> qns=2          <default>     too slow for this test
> If anybody has anything to suggest or spots anything wrong, please speak
> up now. Unless I hear any dissent I'm going to send it to Doom9 tomorrow
> evening.

Looks good to me.

> Further notes:
> I have been unable to find a suitable value for nr. Between nr=0 and
> nr=400 it seems to be a general progression toward loss of detail
> without any corresponding reduction in blockiness. Mostly it makes
> stubble on men's chins look blurry.

This is disappointing, as it was advertised as fast and effective denoising
measure by some people here.


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 We stand between the darkness ... and the light."
        -- Delenn in Grey Council in Babylon 5:"Babylon Squared"

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