mpeg on the GPU

[leo77]

Hi...

Is there a way to encode/decode a video using GPU (like an nVidia Geforce 6800)? I found this link http://www.xbitlabs.com/articles/video/display/nv40_11.html talking about this, but I didnt find something to teach me how to do it.

thanks in advance

Leo

[Ufit]

Hey.

There definitely is some way. I tried once but this is a monster.
As far as I know it's all done under Windows DDK and it's called
DirectX Video Acceleration Interfaces. To encode and decode
u must access among others ProcAmp control and Deinterlace Device
functions. Well, when I looked only at the structures it seemed to me
that the number of parameters would be larger that source code
of this stuff)). By the way u must have Driver Development Kit to
access libraries. I would like to know how to do that too. I heard that
motion compensation done on GPU is hundreds times faster than done
on CPU. Maybe this link can help you a little.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/graphics/hh/graphics/...37d75e.xml.asp

[leo77]

Thanks for trying to help, but I still cant encode/decode videos on the GPU.
If someone has an example, i think it would be more helpful , because everything I've read (its not a lot, cause I coudnt find lots of things) didnt even give me the to start.

[Ufit]

Try this link.
http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/directx9_c/directx/ht...ccelerator.asp

There is some detail explanation how to implement hardware video
enc/dec functions. DirectShow can do that via Video Mixing Renderer.
I haven't found any free libraries using hardware video features.
There are good MPEG-2 encoder filters but most of them use software
fex. Elcard. Mpeg-2 encoding is an art and all good encoders are usualy
patented and copyrighted. I'd try to program your own custom encoder.