/*

 * test_video.cpp

 *

 *  Created on: April 17, 2012

 *      Author: Zhigang Tan

 *

 * */

#include "opencv2/highgui/highgui.hpp"

#include <opencv2/objdetect/objdetect.hpp>

#include <opencv2/imgproc/imgproc.hpp>

#include <iostream>

#include <vector>

#include <stdio.h>

using namespace cv;

using namespace std;

void help(char** av)

{

}

int processVideo(VideoCapture& capture)

{

  int n = 0;

  char filename[200];

  string window_name = "video | q or esc to quit";

  namedWindow(window_name, CV_WINDOW_KEEPRATIO); 

  Mat frame;

        int i = 2000;

  for (;;)

  {

                capture.set(CV_CAP_PROP_POS_FRAMES, i);

    capture >> frame;

                if (frame.empty())

                {

                        break;

                }

                int j = capture.get(CV_CAP_PROP_POS_FRAMES);

                cout<< "get =" << j << "| set:" << i<<endl;

                i -= 2;

                int bQuit = false;

    imshow(window_name, frame);

    char key = (char) waitKey(5); 

    switch (key)

    {

    case 'q':

    case 'Q':

    case 27: //escape key

                        bQuit = true;

      break;

    default:

      break;

    }

                if (bQuit)

                {

                        break;

                }

  }

        waitKey();

  return 0;

}

int main(int ac, char** av)

{

  if (ac != 2)

  {

    help(av);

    return 1;

  }

  std::string arg = av[1];

  VideoCapture capture(arg); 

  if (!capture.isOpened()) 

  {

    cerr << "Failed to open a video file!\n" << arg<< endl;

    help(av);

    return 1;

  }

  return processVideo(capture);

}