opencv: video capturing from a camera

// Test: video capturing from a camera

#include <OpenCV/OpenCV.h> // matrix operations

int main()
{
    IplImage* image = 0;
    // initialize capture from a camera
    CvCapture* capture = cvCaptureFromCAM(0); // capture from video device #0
    cvNamedWindow("camera");
   
    while(1) {
        if ( !cvGrabFrame(capture) ){
            printf("Could not grab a frame\n\7");
            exit(0);
        }
        else {
        cvGrabFrame( capture ); // capture a frame
        image = cvRetrieveFrame(capture); // retrieve the caputred frame
       
        cvShowImage( "camera", image );
       
        if( cvWaitKey(10) >= 0 )
            break;
        }
    }
   
    cvReleaseCapture( &capture ); // release the capture source
    cvDestroyWindow( "camera" );

    return 0;
}