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USB video capture to cuda

First off sorry I'm new to Windows and CUDA programming, well all of CV really.

I have a Diamond GC1000 USB video capture device, I want to be able to feed the HD video stream from the device into my GPU so that I can real time process the frames, but I have no idea where to start.

My basic stumbling block is I don't understand how I interface my CUDA code to the USB drivers, I have my CUDA code that I can say perform edge detection on a static PNG, what I need to do is replace that PNG with the stream frames from the GC1000.

Any guidance would be appreciated!

Thanks

Joby