For a while I'm having issue trying to implement ICvCameraViewListener. I inherit it , implement its methods, yet they're not called at all. Tried on both Activity and JavaCameraView.
Looking at the OpenCV for Android java sample code, there is a line: mOpenCvCameraView.setCvCameraViewListener(this); but there is no such a method in JavaCameraView nor in CameraBridgeViewBase.
I can go via OnPreviewFrame() callback method, but then what is the point of ICvCameraViewListener interface if I have to convert byte[] to Mat myself.
Also this alternative approach gives some unexpected results.
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