There's quite a few links to mpeg4 related pages at
   http://www.mpeg.org/MPEG/starting-points.html#mpeg4

Apparently it is an ISO standard.

The most well know mpeg 4 codec at the moment may be "divx ;-)" 
hacked from an older version of media player. It wont surprise me if 
MS has some involvement or representation in the mpeg group, but 
they don't own it.

I find that the divx ;-) codec works surprisingly well, giving better 
looking playback of higher resolution files at data rates less than a 
VCD. My main gripe at the moment would be the slow encoding. 
And I have yet to find a decent (and quick) way to get around 
interlacing when capturing at higher resolutions...


Mad Mackerel -Mya!- : Cutes, cels and stuff
mackerel@kawaii.org : http://www.kawaii.org/