title: Playing video to correct speed with OpenCV
body: <p>I have problem with plying video file, why it is slow motion ?
  How can I make it normal speed?</p>
  
  <pre><code>#include"opencv2/opencv.hpp" 
  using namespace cv; 
  
  int main(int, char**) 
  { 
      VideoCapture cap("eye.mp4"); 
      // open the default camera 
      if (!cap.isOpened()) 
          // check if we succeeded 
          return -1; 
  
      namedWindow("Video", 1); 
      while (1) 
      { 
          Mat frame; 
          cap &gt;&gt; frame; 
          imshow("Video", frame); 
          if (waitKey(10) == 'c') 
              break; 
      } 
      return 0; 
  }
  </code></pre>