Thread issue with VideoCapture?

[Anonymous]

See code below, running on 64 bits windows 7, jdk 1.7.0_04.

If not doing "invoke later", it works fine, but if do "invoke later", then it shows "org.openimaj.video.capture.VideoCaptureException: An error occured opening the capture device"

I think there is an issue if there are two threads using the grabber at the same time.

Anthony

--
public class TestVideoCapture {

private static void showWindows(final List<Device> devices) {
    final int w = 320;
    final int h = 240;
    final double rate = 10.0;

    for (int y = 0, i = 0; y < 3; y++) {
        for (int x = 0; x < 3 && i < devices.size(); x++, i++) {
            try {
                final VideoCapture grabber2 = new VideoCapture(w, h, rate, devices.get(i));
                final VideoDisplay<MBFImage> disp = VideoDisplay.createVideoDisplay(grabber2);
                SwingUtilities.getRoot(disp.getScreen()).setLocation(320 * x, 240 * y);
            }
            catch (Throwable t) {
                t.printStackTrace();
            }
        }
    }
}
/**
 * @param args
 */
public static void main(String[] args) throws VideoCaptureException {
    final List<Device> devices = VideoCapture.getVideoDevices();
    for (final Device d : devices)
        System.out.println(d);

    if (devices.size() == 1) {
        final VideoCapture grabber1 = new VideoCapture(640, 480, devices.get(0));
        VideoDisplay.createVideoDisplay(grabber1);
    }
    else {
        showWindows(devices);

// SwingUtilities.invokeLater(new Runnable() {
//
// public void run() {
// showWindows(devices);
// }
// });
}
}

}