How to avoid “Video Source -> Capture source” selection in OpenCV 2.3.0 - Visual C++ 2008

Question

I had a perfectly working OpenCV code (having the function cvCaptureFromCAM(0)). But when I modified it to run in a separate thread, I get this \"Video

Answer 1

Since this is a problem that only happens on Windows, an easy fix is to leave cvCaptureFromCAM(0) on the main() thread and then do the image processing stuff on a separate thread, as you intented originally.

Just declare CvCapture* capture = NULL; as a global variable so all your threads can access it.

Answer 2

Solved. I couldn't get rid of the above mentioned dialog box, but I avoided the error by simply duplicating the line capture = cvCaptureFromCAM(0);

capture = cvCaptureFromCAM(0);
capture = cvCaptureFromCAM(0);

It was just random. I suspect it had something to do with behavior of Thread. What's your idea?

Thanks all for contributing.