I am using A4tech webcam, and I connect it to the opencv via visual studio. But the problem is that I cannot analyse it's frames. i.e. the program is built completely, but if in the main code I have used the frame properties, it will not start running. The memory of the frames (frame=cvQuaryFrame(capture)) is not accessible. But this problem is only for external webcam. The laptop Embedded webcam does not have this problem. I have attache the .cpp code that I have written
You can try calling this: capture->VI.listDevices(); It will return a list of all connected devices. It may be that the external webcam index is not 1 (the one you used) in the list.
Hope it helps.
Thanks Mr. Matu. As I said , I can find the webcam and show it in a window by opencv. But when I want to analyse its frame, The program stops running. I think maybe A4TECh is not a compatible webcam for windows opencv. do you know a list of webcams that are compatible with opencv?
In case it helps, I have a number of example OpenCV applications that use one, two, or more cameras ... Found here - http://mercury.pr.erau.edu/~siewerts/extra/code/, specifically here - http://mercury.pr.erau.edu/~siewerts/extra/code/computer-vision/, and a paper on using 2 webcams here - http://www.ibm.com/developerworks/library/bd-mdasecurity/
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