Question

I’m getting a memory leak in this code and I’m not able to find what I’m doing wrong.

CvCapture* capture = cvCaptureFromFile([[url path] UTF8String]);

while (cvGrabFrame(capture)) {    
  IplImage *frame = cvRetrieveFrame(capture);

  if (frame) {
    [...]
  } else {
    break;
  }
}

cvReleaseCapture(&capture);

If I remove cvRetrieveFrame the memory leak disappears. If I change cvGrabFrame and cvRetrieveFrame with one cvQueryFrame the same behavior happens.

The behavior is the same with cvReleaseCapture enabled or commented out. So it’s probably something related to that, but I can’t figure out what.

I’m using openCV r7286 on iOS.

Answer 1

It was a bug in openCV. A fix is available in the latest trunk.