qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/ubuntu/anaconda3/envs/detectron2/lib/python3.7/site-packages/cv2/qt/plugins" even though it was found.
在使用qt时候出现这个错误,无法加载opencv的qt lib。
通过将opencv 的版本降低 opencv v4 -》opencv v3。可以正常使用。