gistfile1.txt

#include "opencv2/opencv.hpp"
#include <ctime>
#include <sys/timeb.h>

using namespace cv;

int main(int, char**) {
	VideoCapture cap(1); // open the default camera
	if (!cap.isOpened()) // check if we succeeded
		return -1;

	cap.set(cv::CAP_PROP_FRAME_WIDTH, 1280);
	cap.set(cv::CAP_PROP_FRAME_HEIGHT, 720);
	cap.set(CV_CAP_PROP_FOURCC, CV_FOURCC('M', 'J', 'P', 'G'));

	Mat edges;
	namedWindow("edges", 1);

	int i = 0;

	clock_t start, stop;
	struct timeb tstart, tstop;
	start = clock();
	ftime(&tstart);

	for (;;) {
		Mat frame;
		cap >> frame; // get a new frame from camera
		++i;
		stop = clock();
		ftime(&tstop);
		double diff = (stop - start) / double(CLOCKS_PER_SEC);
		double tdiff = ((1000.0 * (tstop.time - tstart.time) + (tstop.millitm - tstart.millitm))) / 1000.0;
		double rate = i / tdiff;
		printf("n: %d, rate: %f, cpu_time=%.3f time=%.3f\n", i, rate, diff, tdiff);
		// imshow("edges", frame);
		// if(waitKey(30) >= 0) break;
	}
	// the camera will be deinitialized automatically in VideoCapture destructor
	return 0;
}