example_02-03.cpp

#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>

using namespace std;

int main( int argc, char** argv ) {

  cv::namedWindow( "Example 2-3", cv::WINDOW_AUTOSIZE );

  cv::VideoCapture cap;

  cap.open( string(argv[1]) );
      cout <<"Opened file: " <<argv[1] <<endl;

  cv::Mat frame;

  for(;;) {

    cap >> frame;

    if( frame.empty() ) break; // Ran out of film

    cv::imshow( "Example 2-3", frame );

    if( (char)cv::waitKey(33) >= 0 ) break;

//    int c = cv::waitKey(33);
//    for(int i=0;i<32;i++) {
//      cout <<((c&(0x1<<(31-i)))?1:0);
//    }
//      cout <<endl;
//      cout <<"Breakey: '" <<(int)c <<"'"<<endl;
//    if( (signed char)c >= 0 ) {
//      break;
//    }

  }

  return 0;

}