Quote:
Originally Posted by Sulik
The real restriction is the HD/BD profile & level restriction, ie: high profile, level 4.1.
For the number of references, this means that the maximum is 12288KB/(W*H*1.5):
1920x1080 -> max num_ref_frames = 4
1280x720 -> max num_ref_frames = 9
720x480 -> max num_ref_frames = 16 (max)
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I would agree, from my experience troubleshooting, that the profile/level compliance is the issue for DXVA.
Quote:
Originally Posted by Sulik
The mixed_ref/adaptive B-frames restriction is not a HW restriction, but more likely a bug in the Cyberlink decoder (or demux<->decoder interaction problem, or possibly though unlikely, encoder compliance issue).
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I would also agree that the mixed ref / adaptive b-frames issue is with the decoder, and is the source of the 20fps bug, as DXVA will work with the proper number of ref frames, but the 20fps bug persists with adaptive b-frames. I haven't tested mixed ref without adaptive b-frames to isolate it further, but the bug persists when using adaptive b-frames without mixed ref. So at a minimum, adaptive b-frames alone can cause the 20fps bug.