I tried for a bit using HD youtube clips, but I couldn't be sure whether DXVA was actually being used or not.
After doing a bit more research, it seems that DXVA is a very complicated topic, and whether it is used or not depends on the GPU hardware, GPU driver/software versions, decoding software installed, and the individual video file itself.
There is an in-depth discussion here that revolves around a utility called DXVA-checker, available here.
Here's the output from the tool (DXVAChecker64_2.5.0) when run on my system:
AMD Radeon HD 6800 Series
ModeMPEG2_VLD: DXVA2, 720x480 / 1280x720 / 1920x1080
ModeMPEG2_IDCT: DXVA2, 720x480 / 1280x720 / 1920x1080
ModeMPEG2_A: DXVA1, 720x480 / 1280x720 / 1920x1080
ModeMPEG2_C: DXVA1, 720x480 / 1280x720 / 1920x1080
ModeH264_VLD_NoFGT: DXVA2, 720x480 / 1280x720 / 1920x1080
ModeH264_VLD_NoFGT_Flash: DXVA2, 720x480 / 1280x720 / 1920x1080
6719B6FB-5CAD-4ACB-B00A-F3BFDEC38727: DXVA2, -
ModeH264_VLD_Multiview_Avivo: DXVA2, 720x480 / 1280x720 / 1920x1080
ModeVC1_VLD: DXVA2, 720x480 / 1280x720 / 1920x1080
CA15D19A-2B48-43D6-979E-7A6E9C802FF8: DXVA2, -
ModeMPEG4pt2_VLD_AdvSimple_Avivo: DXVA2, 720x480 / 1280x720 / 1920x1080
5B23D46D-FA5F-4FDC-B78A-7EB2787942EC: DXVA2, 720x480 / 1280x720 / 1920x1080
If you click on the big "Check for DirectShow / MediaFoundation Decoders..." button along the bottom of the dialog, you can browse for a test clip. The program should then analyze the clip and present a list of possible decoders to use. If you don't see anything come up in red, then the clip will likely not play using DXVA acceleration. If you do se a decoder that is listed in red, click on the arrow to the left and choose either "play" or "benchmark".
I'd be happy to try some other applications on my system, but I might need some help getting the specific decoder / application chain set up on my system.
Message was edited by: somedude1234 (added missing html link)
