[MEncoder-users] new doom9 codec comparission

[Corey Hickey]

This is a status update and an inventory of what must be done.

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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.

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2. mpeg4 encoding commands for The Matrix.
This will end up being something like:
--
for i in $1 $2 ; do
  mencoder ~/dumpstream/matrix.vob -aid 128 -oac copy \
  -vf crop=718:356:0:60,scale=640:272 -ovc lavc -lavcopts \
  vcodec=mpeg4:threads=2:vbitrate=581:vratetol=1000:1:mbd=2:mv0:trell:\
  cbp:precmp=2:cmp=2:subcmp=2:predia=2:dia=2:preme=2:vme=5:v4mv:\
  vpass=$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
* I need to test last_pred=2
* I need to test NSSE (*cmp=10)

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3. mpeg4 decoding commands for The Matrix.
Currently I like:
$ mplayer matrix.avi -vf spp=2,noise=3ah
This isn't final, but pretty darn good-looking on both my CRT and my
laptop screen.

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4. snow encoding commands for The Matrix.
I just started encoding a test clip using snow, and will refine the
parameters as I go. I'm starting out with the suggested command in
DOCS/tech/snow.txt, but changing vqscale to vbitrate for the second
pass. I'm going to try vqcomp=0.7 and vqcomp=0.6. Does anybody have any
more suggestions?

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5. snow decoding commands for The Matrix.
I'll figure this out after I start narrowing down snow.

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6. Have I missed anything?

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7. If lavc mpeg4 and/or snow passes the preliminary round, I'll have to
look at The Matrix Revolutions and Saving Private Ryan. Probably I won't
have to change anything but the scaling,cropping and vbitrate/vqscale
parameters.


-Corey