- I previously recommended ATI cards over nVidia, but now things has changed. First,with the release of Detonator 178.24, all qualifying cards (at least that the ones this driver supports) now officially support L5.1 videos. Second, since Catalyst 8.6, ATI has changed the way DXVA works on their cards which caused problems like macroblocking, green screens etc. and this problem will be more apparent if you use AGP cards (that’s why most users that has problems in the comment section and the boxtorrent thread usually has AGP cards). PCI-E users is also affected by this problem, but much less so than AGP users.For this, all nVidia card users should upgrade to 178.24 or later (this is the latest non-beta as of writing), grab the beta build 867 or newer and enjoy increased compatibility. For ATI users, those who has the AGP cards (HD 2xxxx and HD 3xxxx) and has problems playing videos in DXVA mode, downgrade to Catalyst 8.5 hotfix (available at
ATI Catalyst Drivers Downloads or any other similar sites). If you do not have problems, do not change anything (I even suggest that you do not change your drivers ever again). If the problem persisted, you may have to use external decoders such as the one included in PowerDVD. The changes made in Catalyst 8.6 caused MPC-HC internal DXVA decoder to not work correctly with ATI cards.
- Not all videos can be accelerated. It has to be encoded with compatible profiles. The highest profile that can be used is L4.1. More info about this can be found at
Doom9's Forum - View Single Post - x264 Known Hardware accelleration problems and solutions and
AVS Forum - View Single Post - x264 Encoding Options for Hardware Compatibility & DXVA. With nVidia new drivers, the cards now support L5.1 profiles though. This test video is an example where MPC-HC will now decode L5.x videos which it will not before.
)?