[MEncoder-users] new doom9 codec comparission

[Dominik 'Rathann' Mierzejewski]

On Saturday, 03 December 2005 at 03:58, Corey Hickey wrote:
> This is a status update and an inventory of what must be done.
> 
> ------------------------------------------------------------------------
> 1. mencoder binaries for windows.
> Doom9's usual binaries are at:
> http://www.aziendeassociate.it/cd.asp?dir=/mplayer
> The latest on that page are from 2005-11-23, and there is an
> athlon64-specific build. Probably these are suitable. I can't test the
> athlon64 build, so if anybody with access to an athlon64 windows box can
> test it that would be helpful.
> 
> ------------------------------------------------------------------------
> 2. mpeg4 encoding commands for The Matrix.
> This will end up being something like:
> --
> for i in $1 $2 ; do
>   mencoder ~/dumpstream/matrix.vob -aid 128 -oac copy \
>   -vf crop=718:356:0:60,scale=640:272 -ovc lavc -lavcopts \

Loren has recommended lanczos swscaler for scaling (-sws 9). Isn't it what
Doom9.org said should be used anyway?

>   vcodec=mpeg4:threads=2:vbitrate=581:vratetol=1000:1:mbd=2:mv0:trell:\
                                                      ^
What is this lonely '1' doing here? ------------------|

And why such small vratetol?

>   cbp:precmp=2:cmp=2:subcmp=2:predia=2:dia=2:preme=2:vme=5:v4mv:\

Why vme=5? According to the manpage it's "aliased to 4", which is the default.

>   vpass=$i -ofps 24000/1001
> done
> --
> * qns=2, unfortunately, is prohibitively slow
> * I'm hoping to add turbo for pass 1 with little negative effect
> * I need to test vqcomp=0.7 or vqcomp=0.6

Rich said something about keeping it at the default level of 0.5 on IRC
the other day.

> * I need to test last_pred=2
> * I need to test NSSE (*cmp=10)

If there's any noise in the source, maybe add nr=400?

Oh, one more thing: what about B-frames?

Regards,
R.

-- 
MPlayer RPMs maintainer: http://rpm.greysector.net/mplayer/
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 We stand between the darkness ... and the light."
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