27 …deo file, image sequence (01.jpg, 02.jpg ... 10.jpg) or camera connected to your computer." << endl  in help()
28              << "Usage:\n" << av[0] << " <video file, image sequence or device number>" << endl  in help()
29              << "q,Q,esc -- quit" << endl  in help()
30              << "space   -- save frame" << endl << endl  in help()
31 …apture from a camera pass the device number. To find the device number, try ls /dev/video*" << endl  in help()
32              << "\texample: " << av[0] << " 0" << endl  in help()
33              << "\tYou may also pass a video file instead of a device number" << endl  in help()
34              << "\texample: " << av[0] << " video.avi" << endl  in help()
35 …o pass the path to an image sequence and OpenCV will treat the sequence just like a video." << endl  in help()
36              << "\texample: " << av[0] << " right%%02d.jpg" << endl;  in help()
43         cout << "press space to save a picture. q or esc to quit" << endl;  in process()
63                 cout << "Saved " << filename << endl;  in process()
84         cerr << "Failed to open the video device, video file or image sequence!\n" << endl;  in main()