Memory Leak with some functions

[0rbianta]

While I was looping through frames of VideoCapture I executed this method to show frames on JavaFX image view:
private Image mat2Image(Mat frame) {
MatOfByte buffer = new MatOfByte();
Imgcodecs.imencode(".png", frame, buffer);
return new Image(new ByteArrayInputStream(buffer.toArray()));
}

for some reason it caused memory leak very rapidly like 5mb/s. After that I switch to opencv library from their official website and same code worked fine without any leaks.

[codespearhead]

What do you mean by "After that I switch to opencv library from their official website and same code worked fine"?

If you switched to Python, then there's no guarantee openpnp/opencv is the root of the problem without an MRE.

[0rbianta]

Everything kept the same after changing opencv library from openpnp to official.
Code given above caused a memory leak. It been a while since I changed the source of that function but it might be an automatic resource management feature in the official library.

As far as I remember, I did expect OpenCV to automatically handle resource management and I didn't free the resources manually. Also I used openpnp with mutli-threading. Was it thread-safe? 🤔

Sorry for not being able to produce a MRE.