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How to find my Camera Index?

I have interfaced my Raspberry pi running Rasbian with two cameras. The cvCaptureFromCAM( int index ) function has the parameter index which is the camera index. What value should I give in here? or how will I find my camera index?

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How to find my Camera Index?

I have interfaced my Raspberry pi running Rasbian with two cameras. The cvCaptureFromCAM( int index ) function has the parameter index which is the camera index. What value should I give in here? or how will I find my camera index?