Hi, 2012/7/2 Oliver Seitz <[email protected]>: > >>> I can play a 3840x2160 video by MPlayer-vaapi on my machine. > > Is this new on IVB, or should it also work on SNB?
The PRM available at <http://www.intellinuxgraphics.org/> for Ivy Bridge mentions that the HW decoding engine supports H.264 high profile up to level 5.1. For Sandy Bridge, the /vaapi.html page on the same website mentions that it only supports H.264 high profile up to level 4.1. Based on this data publicly available, you can see that Sandy Bridge can't support 3840x2160 videos. However, you pointed an interesting issue whereby our logic to validate the VA context is suboptimal, if not slightly incorrect. In particular, SNB could support 3072x672p30 videos as this still lays into the constraints defined by Table A-1 from the AVC standard. I propose to make video size validation a function rather than fixed values. That'd also fix the constraint for IVB whereby only one dimension could reach 4K (4096 pixels), not both. Regards, Gwenole. _______________________________________________ Libva mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/libva
