OpenCV load a video.

opencv-load-video.cpp

#include <iostream>
#include <stdio.h>
#include "opencv2/highgui/highgui.hpp"

int main( int argc, const char** argv ) {
    
    cvNamedWindow("Example2", CV_WINDOW_AUTOSIZE);
    
    CvCapture* capture = cvCreateFileCapture( argv[1] );
    
    IplImage* frame;
    
    while(1) {
        
        frame = cvQueryFrame( capture );
        
        if( !frame ) break;
        
        cvShowImage("Example2", frame);
        
        char c = cvWaitKey(33);
        
        if( c == 27 ) break;
    }
    
    cvReleaseCapture( &capture );
    
    cvDestroyWindow("Example2");
}