[Libva] Bitrate limit for hardware decoding by intel hd graphics?

[Gwenole Beauchesne]

Hi,

2012/7/13 Arie Peterson <ariep at xs4all.nl>:

> (This is not even the worst one, I think: the 50-fps clips recorded by my
> camcorder are played back even more slowly. I don't have one of those at hand
> right now, though. Will post later.)
>
> Format: AVC
> Format profile: High at L5.1
> Resolution: 1920x1080
> ReFrames: 16 frames

That's the issue. You can't match real-time constraints for such a
video on Ironlake: h.264 high profile @ L5.1, especially with so many
reference frames. The HW will decode, but not in real-time. 1080p30
with HP @ L4.1, up to 4 ref frames at this resolution, will work fine
though.

Regards,
Gwenole.