How do I grab frames from a video stream on Windows 8 modern apps?

Question

I am trying to extract images out of a mp4 video stream. After looking stuff up, it seems like the proper way of doing that is using Media Foundations in C++ and open the frame/

Answer 1

I think OpenCV may help you. OpenCV offers api to capture frames from camera or video files. You can download it here http://opencv.org/downloads.html. The following is a demo I writed with "OpenCV 2.3.1".

#include "opencv.hpp"

using namespace cv;
int main()
{
    VideoCapture cap("demo.avi");   // open a video to capture
    if (!cap.isOpened())        // check if succeeded
        return -1;

    Mat frame;
    namedWindow("Demo", CV_WINDOW_NORMAL);
    // Loop to capture frame and show on the window
    while (1) {
        cap >> frame;
        if (frame.empty())
            break;

        imshow("Demo", frame);
        if (waitKey(33) >= 0)  // pause 33ms every frame
            break;
    }

    return 0;
}