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I would like to read analog video signal images, if possible directly from OpenCV VideoCapture object from Windows (7/8).

After testing a cheap usb video grabber (maybe stk-1160 chip) without any success (didnt even work with DirectShow Graphstudio) I would like to know two things:

1. Are there any usb analog video grabber known to work with OpenCV.

2. What properties must be fulfilled for a device to be readable from a OpenCV VideoCapture element (e.g. if OpenCV was compiled with DirectShow support)? Is it enough that the device uses a WDM Video Capture driver? So that I don't have to buy 100 different devices and test each one ;)

If none of the questions can be answered: How can I grab a analog video signal to use it in my own code (asking for both: hardware and SDKs/libraries/etc)?

I would like to read analog video signal images, if possible directly from OpenCV VideoCapture object from Windows (7/8).

After testing a cheap usb video grabber (maybe stk-1160 chip) without any success (didnt even work with DirectShow Graphstudio) I would like to know two things:

1. Are there any usb analog video grabber known to work with OpenCV.

2. What properties must be fulfilled for a device to be readable from a OpenCV VideoCapture element (e.g. if OpenCV was compiled with DirectShow support)? Is it enough that the device uses a WDM Video Capture driver? So that I don't have to buy 100 different devices and test each one ;)

If none of the questions can be answered: How can I grab a analog video signal to use it in my own code (asking for both: hardware and SDKs/libraries/etc)?