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                                            Yuanjw

qt.qpa.plugin: Could not find the Qt platform plugin "offscreen" in "/root/miniconda3/envs/human/lib/python3.8/site-packages/cv2/qt/plugins"

This error will cause all gui-related functions of cv2，like `cv2.imshow()` and `cv2.waitKey()` to be unavailable. I don’t know if it’s because of this that ,`process1.join()` has never been able to...