Hmmm...
I remember a website that test WM9, DivX4?, and MPEG-4.
From the look of it, WM9 outperform MPEG-4.
Also, THX, what bitrate is the compressor of th XVid is running comparing to WM9?
Because from a website,
they tested the Matrix compressed from WM9, MPEG-4, and Divx. All compressed to the same bitrate and resolution for a fair comparison.
They make two tests.
The three codecs at 1 Mbits running at 720 x 480 DVD resolution.
and another one at 512 Kbits.
another test is three codecs running at 1 Mbits running at 320 x 240 or a quarter resolution of DVD.
and another 1 at 512 Kbits.
From the test, of course the original looks the best. Then WM9 look better than the other 3 codecs. But in some cases DIVX look just as good as WM9 or a bit better while other tests, WM9 look a bit better than DIVX.
But MPEG-4 look worst on all the tests. MPEG-4 look very bad. Especiall scenes with fast motion where it have trouble compression it well.
And I believe all of the three tests are running at 24 fps.