which frame grabber HD can i use with OpenCV ?

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Hi people,

i am using SD resolution frame grabber (EasyCap and similar) with OpenCV and it works very well but now i need an HD frame grabber so i bought Elgato Game Capture.

Elgato doesn't work with OpenCV (i can't get frame) and Windows 7 doesn't see it as a capture device.

So my question is: which HD grabber can i use to get frames directly from OpenCV?