Quote:
Originally Posted by HeadlessCow
Also of note, the ATI 4670 cannot handle 5 ref frames in DXVA mode with 1080p video.
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That's correct, ATI strictly enforces the H.264 profile/level High@L4.1 for HD content as developed/approved by the associations responsible for the HD DVD and BluRay Disc standards. Nvidia doesn't so they can generally decode L5.1@1080p video with DXVA.
If you are interested in all of the compliant combinations of resolution, ref. frames, b frames and b-pyramids, you can look at this page on AVS Forum:
http://www.avsforum.com/avs-vb/showthread.php?t=972503
Cheers,
The REAL Joe