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I thought when i==20 it will release the camera but the process is still holding the camera. How can I release it. I am sure cvQueryFrame is playing some role for not releasing the camera.

main( int argc, char* argv[] ) { int i=1; CvCapture* capture = NULL; capture = cvCreateCameraCapture( 0 );

IplImage *frames = cvQueryFrame(capture);

while(1) {      
    if (i==20)
        cvReleaseCapture ( &capture );

    char c = cvWaitKey(33);
    if( c == 27 ) break;
    i++;
}
return 0;

}

I thought when i==20 it will release the camera but the process is still holding the camera. How can I release it. I am sure cvQueryFrame is playing some role for not releasing the camera.

main( int argc, char* argv[] ) {
    int i=1;
    CvCapture* capture = NULL;
    capture = cvCreateCameraCapture( 0 );
);
  
 IplImage *frames = cvQueryFrame(capture);

 while(1) {      
     if (i==20)
         cvReleaseCapture ( &capture );

     char c = cvWaitKey(33);
     if( c == 27 ) break;
     i++;
 }
 return 0;

}
  
}