Memory Leak from iterating Opencv frames

Question

I am using the java wrapper of OpenCV. I tried to write an Iterator over frames of a film. My problem is that the iterator is a huge memory leak. Here is a very simplified v

Answer 1

I would modify your .hasNext method to:

public boolean hasNext() {
    return hasNext;
}

And then the method you described, copied below, should work fine... You will iterate until nothing is left, at which point you can assign that last image to a new Mat object...

public Mat next() {
    capture.retrieve(mat);
    hasNext = capture.grab();
    return mat;
}

and then:

final VideoCapture vc = new VideoCapture("/path/to/file");
final SimpleIt it = new SimpleIt(vc);
final Mat lastFrame = new Mat();
while (it.hasNext) {
    lastFrame = it.next();
}

I do realize this creates additional memory usage. There is probably a way around this, but it should work fine...