#include <opencv2/highgui/highgui.hpp>

#include <time.h>

#include <iostream>

int main()

{

        cv::VideoCapture cap("d:/test.avi");

        cv::Mat frame;

        for (;;)

        {

                clock_t start = clock();

                cap >> frame;

                double time = clock() - start;

                if (time > 500)

                        std::cout << "Took to long: " << time << " milliseconds!\n";

                if (frame.empty())

                        break;

                /*

                // or use the following instead:

                clock_t start = clock();

                bool last = !cap.read(frame);

                double time = clock() - start;

                if (time > 500)

                        std::cout << " Took to long: " << time << " milliseconds!\n";

                if (last)

                        break;

                */

        }

}