[Solved] cv2.error: (-215:Assertion failed) encoder-＞isFormatSupported(CV_8U) in function ‘imwrite_‘

OpenCV Error:
cv2.error: OpenCV(4.5.1) /private/var/folders/nz/vv4_9tw56nv9k3tkvyszvwg80000gn/T/pip-req-build-39p1qqfs/opencv/modules/imgcodecs/src/loadsave.cpp:694: error: (-215:Assertion failed) encoder->isFormatSupported(CV_8U) in function ‘imwrite_’

    1. First check if the path is wrong check the image type, for example, for exr suffix images, float64 can not be saved

Solution:

img = img.astype(np.float32)