GPU Video decoding

[MrFrustum]

Hello,

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

Thank you

[carsten neumann]

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]

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.