Originally Posted by sl1pkn07
the series 6XXX/7XXX not have the capacity to do this? ("Purevideo Ready")
The GeForce 6/7 series and G80 based GeForce 8 series PureVideo hardware only accelerates part of the decode process. What it supports is pretty much all already exposed in xvmc for MPEG-2, just not for H.264 (not including G80, which has no video decode acceleration exposed at all). Since these cards don't accelerate the entire decode process and VDPAU seems to be all or nothing, it isn't available on these cards.
The PureVideo hardware in newer cards, that are supported by VDPAU, accelerate the entire process for H.264, MPEG-1, and MPEG-2. From what I've been reading, only a few (8200/8300/9300/9400 mGPUs, 9500/9600GT, and some mobile ones) accelerate the entire process for VC-1, so I wouldn't expect to see VC-1 decode available on many cards.
(Please correct me if I am wrong about any of these things).