No success trying to grab images from my built-in MacBook Pro Cam

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Hi,

I am desperately looking for a solution to make my builtin cam working. No matter which settings I try, it does not put on the green light.

This is my main method for testing purposes:

VideoCapture capture_;
capture_.open(0);
Mat img;

if (capture_.isOpened()) {
    printf("Is open!\n");
    sleep(2); // I read somewhere that open takes some time
    Mat frame;
    printf("Codec: %f\n", capture_.get(CV_CAP_PROP_FOURCC));  // this one is 0.0000
    capture_.set(CV_CAP_PROP_FOURCC, CV_FOURCC('M','J','P','G'));
    printf("Codec: %f\n", capture_.get(CV_CAP_PROP_FOURCC));  // it is still 0.0000
    capture_ >> frame;
    // capture_.read(img);  // they both fail
    imshow("Test", frame);
    waitKey(0);
} else {
    printf("Is not open!\n");
}

The cam seems to open correctly (but no green light indicating that). When I try to read from the cam I get an empty image. I found some sources on the web that claimed that I need QuickTime support for the cam to work. But I did not succeed in compiling with QuickTime on OSX 10.8.

Does anyone have further ideas?

Thanks and best regards,

Sebastian