Comment 24 for bug 968647

Udovdh: In case of VDPAU, there's tracing available which is the best way to determine what the applications sends to the GPU.
But since Flash Player is doing hardware detection on its own, I'm afraid it won't be easy to mock another hardware and change Player's behaviour.
Given how the aforementioned patch for libvdpau works, we can assume that the problem is on Adobe's end (Flash Player sends wrong data), since none other player with VDPAU support has the same problem.

The only other case I can think of is broken feature detection, where the NVidia driver (or less likely libvdpau) gives Flash Player incorrect information, but I don't find it very likely; I believe NVidia would fix their driver (given that their staff actually care about this issue) and Radeon didn't have the same problem.

Moving on to bug #967091.