[MEncoder-users] new doom9 codec comparission (submission)

[Guillaume POIRIER]

Hi,

On 12/11/05, Corey Hickey <bugfood-ml at fatooh.org> wrote:
> Doom9 Feedback Hotline wrote:

> > Alright, I'm done encoding. The lavc rip turned out surprisingly close on
> > target size (I've seen different in the past), but the Snow rip didn't. I
> > set the bitrate to 580 kbit/s, mencoder reports 519 kbit/s and the final AVI
> > is 57 MB below target size. I have attached the mencoder output for both
> > passes including the commandlines so you can verify that I did everything
> > correctly. As per the rules of the comparison, you have the possibility to
> > explain / amend settings but if I need to redo the encoding, I need to redo
> > it asap.

Given that with Snow rate control is more difficult to use/tune than
with lavc mpeg4, the simplest fix I'd find if I was in the same
situation would be do run yet another pass with the stats generated on
pass2. The trouble is, unfortunately, that you did not run the
"second" pass with "vpass=3"... So I guess you should do as Corey said
(vqscale = 1.5). In any case, if you could tell us how the resulting
video was looking like, it'd help us to tell you what to change.

Guillaume

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