/*
 * 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);
}