OpenCV and MacOS native rendering in C++

Asked Mar 06 '18 at 19:29

Active Mar 06 '18 at 19:29

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tldr; How do I display a cv::Mat on MacOS natively in a C++ project?

I was having performance problems with waitKey and it was suggested that I use my operating system's native rendering functions for better performance. Performance matters to me as I am doing live effect processing on videos displaying in real-time.

I did some research and discovered that on OSX (my operating system), CoreVideo and CoreGraphics are used for video processing and rendering. However, the complexity of the documentation is making my head spin and I'm not quite sure how to integrate it with the Mat datatype I'm working with.

Any help would be greatly appreciated. Thank you!

asked Mar 06 '18 at 19:29

user1216871

Strange enough, if I pass WINDOW_OPENGL to namedWindow, waitFor's delay drops drastically, but imshow jumps up. – user1216871 Mar 06 '18 at 20:01
This is also a useful link: https://stackoverflow.com/questions/21129683/does-opengl-display-image-faster-than-opencv – user1216871 Mar 06 '18 at 20:05
Information about imshow being slow may be found https://stackoverflow.com/questions/19837796/cvimshow-sometimes-is-very-slow – user1216871 Mar 06 '18 at 20:18
I'm now as an alternative trying to use SDL. – user1216871 Mar 06 '18 at 23:08
Using SDL2 for the UI portion and getting rid of highgui did the trick! No need for Mac specific stuff so far. – user1216871 Mar 08 '18 at 20:34

OpenCV and MacOS native rendering in C++

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