Actual behaviour No extra modules are provided by opencv-contrib-python. Whether I install opencv-python or opencv-contrib-python, the content of site-packages/cv2 is exactly the same. import cv2 ...

I've built OpenCV Python from source with Gstreamer support on Windows 10 machine using Mingw64. Everything is working well in my Python Virtualenv. ImportError: DLL load failed while importing cv2: ...