simultaneous input from all inputs of a framegrabber
 

Dear All,
I've recently bought a bttv-compatible framegrabber to grab input from four analog cameras I have in my office. As the acrd has four inputs, I guess I can connect all my four cameras to card inputs and then with a simple v4l2 code, repeatedly switch between inputs and grab a frame to have four streams of frames from all cameras. I've had some experience with v4l for mywebcam, but I have not worked with any framegrabber before. Can anyone please tell me if what I'm going to do is right or I cannot use all inputs of the grabber in the manner I'm going to do.

Thanks in advance,

faramarz