Minimal Qt6 + OpenCV (C++) examples

Here I present 3 minimal examples of combining Qt6 Widgets with OpenCV in C++.

This is a CMake project, tested on Kubuntu 23.10 (in November 2023).

Important: This is strictly Qt6, the Multimedia API changed a lot in Qt6, my old Qt5 examples are here:
https://bitbucket.org/agrechnev/qt-vid-fun/src/master/

• fun1: Play a video file with Qt, convert each frame to cv::Mat
• fun2: Load an image with OpenCV, display it with Qt
• fun3: Play a video file with Qt, convert each frame to cv::Mat, and display it with Qt