Check black frame by splitting video color channel

BlackFrameChecker.cpp

int main(int argc, char *argv[]) {
	int frameidx;
	int blackframecnt = 0;
	VideoCapture capture("black.mp4");
	Mat frame;
	while (true) {
		if (!capture.read(frame)) {
			break;
		}
		Mat output(frame.size(), frame.type());
		vector<Mat> rgb;
		//vector<Mat> hsv;
		//vector<Mat> ycrcb;
		//cvtColor(frame,output,CV_RGB2YCrCb);
		namedWindow("Orginal");
		imshow("Orginal", frame);
		//split(frame, rgb);
		split(frame, rgb);
		frameidx = capture.get(CV_CAP_PROP_POS_FRAMES);
		if (countNonZero(rgb[0]) == 0) {
			//cout << frameidx << endl;
			if (blackframecnt++ % 300 == 0) {
				cout << "black frame" << endl;
				PlaySound(L"alert4.wav", NULL, SND_FILENAME | SND_SYNC);
			}
		}
		/*else {
			cout << frameidx << endl;
		}*/
		/*namedWindow("b");
		namedWindow("g");
		namedWindow("r");*/

		/*imshow("b", rgb[0]);
		imshow("g", rgb[1]);
		imshow("r", rgb[2]);*/


		if (waitKey(25) >= 0)
			break;
	}
	waitKey(0);
}