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MrFrustum
11-14-2011, 09:24 AM
Hello,

is it possible to decoding video on GPU via OpenGL under Windows?
Maybe using some extensions?

Thank you

carsten neumann
11-14-2011, 12:42 PM
Are you referring to what video player software usually calls hardware acceleration? I always thought that uses different APIs and some dedicated circuitry on the chip (I may well be wrong here, I don't know much about video acceleration techniques).
I could imagine that it is quite possible to accelerate certain steps of video decompression on the GPU, however like many non-rendering specific tasks it's probably easier to use a compute API (OpenCL or CUDA).

MrFrustum
11-14-2011, 02:29 PM
I am referring in particular to the GL_NV_vdpau_interop extension. VDAPU seems a collection of API to off load video decompression to GPU via openGL but it seems it doesn't work for windows. I suspect that, under windows, you only one choice and it is Microsoft's DxVA (DirectX Video Acceleration) API.