[MEncoder-users] new doom9 codec comparission (draft 1)

[Vladimir Mosgalin]

Hi Corey Hickey!

 On 2005.12.08 at 17:53:25 -0800, Corey Hickey wrote next:

> I suspect you will want to use your MeGUI frontend, so I'll just give
> you a relatively compact unix-style command that you can translate easily.
> 
> ---
> for i in vpass=1:turbo vpass=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:qpel:$i \
> -ofps 24000/1001 -o mpeg4.avi
> done
> ---

You're sure about unix-style command? Maybe something that can be
executed under cmd.exe will be better? If they don't know/understand
what ";" and "\" are, they'll become quite irritated at converting it to
windows format.

I suspect they will mention mencoder's "unfriendliness" to a "common
user" in review, so their job should be simplified as much as possible.


The only thing I want to mention about quality is that probably
mpeg_quant option will give better results, or since we know what
exactly will be encoded and target bitrate, maybe even more specific
quantization tables should be used, like kvcd and such. Many good ones
are distributed with xvid.

If you've got no time, at least please check mpeg_quant out. In my
experience, it helps both on high and low bitrates.

-- 

Vladimir