text: #include <opencv2/opencv.hpp>
  #include <iostream>
  using namespace cv;
  using namespace std;
  int main(int argc, char* argv[])
  {
   //open the video file from PC
   VideoCapture cap("images/rhinos.avi"); 
   // if not success, exit program
   if (cap.isOpened() == false) 
   {
    cout << "Cannot open the video file" << endl;
    return -1;
   }
  cout<<"Press Q to Quit" << endl;
  String win_name = "First Video";
  namedWindow(win_name); 
   while (true)
   {
    Mat frame;
    // read a frame
    bool flag = cap.read(frame); 
  
    //Breaking the while loop at the end of the video
    if (flag == false) 
    {
     break;
    }
    //display the frame 
    imshow(win_name, frame);
    //Wait for 100 ms and key 'q' for exit
    if (waitKey(100) == 'q')
    {
      break;
    }
   }
  destroyWindow(win_name);
  return 0;
  }