how to deal the error : qt.qpa.plugin: Could not load the Qt platform plugin "xcb"

[zsdfaker]

when i run kitti_object.py i get the error
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/zsder/anaconda3/envs/tensorflow/lib/python3.7/site-packages/cv2/qt/plugins" even though it was found.
in debug log i get follow message：

Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/zsder/anaconda3/envs/tensorflow/bin/platforms" ...
loaded library "/home/zsder/anaconda3/envs/tensorflow/lib/python3.7/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
QObject::moveToThread: Current thread (0x55c738b00180) is not the object's thread (0x55c738fe29f0).
Cannot move to target thread (0x55c738b00180)

my work space：
ubuntu 20.04
python 3.7
opencv 4.4.0
pyqt 5.9.2
pyqt5 5.15.1

[arxidinakbar]

@zsdfaker same error, did you find out anything?

[Jieqianyu]

Maybe the plugin shipped with opencv was not suited for this version of QT.
It may solve this to install opencv-python==3.4.10.35

[shijinghuihub]

I have reinstalled mayavi according to the version in this link https://blog.csdn.net/qq_42266322/article/details/125387739

[shijinghuihub]

I have reinstalled mayavi according to the version in this link https://blog.csdn.net/qq_42266322/article/details/125387739

And this: pip install opencv-python==4.1.2.30

[ansonlcy]

@shijinghuihub Thank you very much! You have solved my problem!

[ZhongYupei]

@shijinghuihub sorry ，it didn't work for me

[Liuyaqi99]

thanks,it helps

I have reinstalled mayavi according to the version in this link https://blog.csdn.net/qq_42266322/article/details/125387739

[PercyJia95]

Just do "pip install opencv-python==4.1.2.30" without going to that link, this works for me.

[zenjieli]

That is the fix. Why not update the readme?

[gxmc0ming]

I have reinstalled mayavi according to the version in this link https://blog.csdn.net/qq_42266322/article/details/125387739

按照这个版本重新安装环境，可以用