qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.

[jokubas]

For the start: yes, I have seen other threads such as:
https://forum.qt.io/topic/93247/qt-qpa-plugin-could-not-load-the-qt-platform-plugin-xcb-in-even-though-it-was-found
Nothing helped

I use Ubuntu 20.04. I have created a test window with PyQt, it runs on its own. However, when I import OpenCV module (cv2) I get error specified in the title. OpenCV works on its own, PyQt works on its own, both together don't work in the same programme.

I have tried to,

ldd /usr/lib/qt/plugins/platforms/libqxcb.so

but

/usr/lib/qt/

doesn't even exist. I have tried to locate libqxcb.so and it exists in multiple various directories, and I am not sure what to do from here on.

Here are the contents of QT_DEBUG_PLUGINS below. Is that Qt issue or OpenCV issue?

QFactoryLoader::QFactoryLoader() checking directory path "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/cv2/qt/plugins" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/jokubas/anaconda3/envs/Motion/bin" ...
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/2to3"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/2to3-3.9' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/2to3-3.9' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/2to3-3.9"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/2to3-3.9' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/2to3-3.9' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/c_rehash"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/c_rehash' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/c_rehash' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/captoinfo"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tic'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/clear"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/clear'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/dotenv"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/dotenv' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/dotenv' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/easy_install"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/easy_install' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/easy_install' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/epylint"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/epylint' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/epylint' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/f2py"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/f2py' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/f2py' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/f2py3"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/f2py3' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/f2py3' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/f2py3.9"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/f2py3.9' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/f2py3.9' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/idle3"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/idle3.9' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/idle3.9' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/idle3.9"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/idle3.9' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/idle3.9' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/infocmp"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/infocmp'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/infotocap"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tic'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/isort"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/isort' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/isort' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzcat"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/xz'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzcmp"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzdiff' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzdiff' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzdiff"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzdiff' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzdiff' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzegrep"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzfgrep"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzgrep"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzless"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzless' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzless' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzma"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/xz'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzmadec"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/lzmadec'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzmainfo"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/lzmainfo'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/lzmore"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzmore' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzmore' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/ncursesw6-config"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/ncursesw6-config' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/ncursesw6-config' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/openssl"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/openssl'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pip"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pip' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pip' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pip3"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pip3' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pip3' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pydoc"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pydoc3.9' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pydoc3.9' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pydoc3"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pydoc3.9' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pydoc3.9' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pydoc3.9"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pydoc3.9' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pydoc3.9' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pylint"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pylint' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pylint' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pylupdate5"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pylupdate5' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pylupdate5' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pyqt5-tools"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pyqt5-tools' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pyqt5-tools' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pyrcc5"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pyrcc5' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pyrcc5' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pyreverse"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pyreverse' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pyreverse' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/python"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/python3.9'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/python3"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/python3.9'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/python3-config"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/python3.9-config' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/python3.9-config' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/python3.9"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/python3.9'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/python3.9-config"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/python3.9-config' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/python3.9-config' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/pyuic5"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/pyuic5' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/pyuic5' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/qt5-tools"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/qt5-tools' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/qt5-tools' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/reset"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tset'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/sqlite3"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/sqlite3'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/sqlite3_analyzer"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/sqlite3_analyzer' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/sqlite3_analyzer' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/symilar"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/symilar' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/symilar' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/tabs"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tabs'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/tclsh"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tclsh8.6'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/tclsh8.6"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tclsh8.6'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/tic"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tic'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/toe"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/toe'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/tput"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tput'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/tset"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/tset'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/unlzma"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/xz'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/unxz"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/xz'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/wheel"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/wheel' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/wheel' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/wish"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/wish8.6'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/wish8.6"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/wish8.6'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/x86_64-conda_cos6-linux-gnu-ld"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/x86_64-conda_cos6-linux-gnu-ld'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xz"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/xz'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzcat"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/xz'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzcmp"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzdiff' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzdiff' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzdec"
"Failed to extract plugin meta data from '/home/jokubas/anaconda3/envs/Motion/bin/xzdec'" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzdiff"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzdiff' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzdiff' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzegrep"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzfgrep"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzgrep"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzgrep' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzless"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzless' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzless' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/bin/xzmore"
QElfParser: '/home/jokubas/anaconda3/envs/Motion/bin/xzmore' is not an ELF object
"'/home/jokubas/anaconda3/envs/Motion/bin/xzmore' is not an ELF object" 
         not a plugin
QFactoryLoader::QFactoryLoader() checking directory path "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/cv2/qt/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqeglfs.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "archreq": 0,
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "archreq": 0,
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqminimal.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqminimalegl.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "archreq": 0,
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqoffscreen.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqvnc.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "archreq": 0,
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archreq": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-glx"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwebgl.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqwebgl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "webgl"
        ]
    },
    "archreq": 0,
    "className": "QWebGLIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("webgl")
QFactoryLoader::QFactoryLoader() looking at "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so"
Found metadata in lib /home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/home/jokubas/anaconda3/envs/Motion/bin/platforms" ...
loaded library "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"
QObject::moveToThread: Current thread (0x55ca7d32ff10) is not the object's thread (0x55ca7d871b20).
Cannot move to target thread (0x55ca7d32ff10)

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/cv2/qt/plugins" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl.

Aborted (core dumped)

[JonB]

@jokubas
I'm afraid I don't know the answer to your problem --- perhaps an expert here can? --- but I think I can give you a couple of hints from the output.

When we run with QT_DEBUG_PLUGINS=1, we always look at the very end of the diagnostics to see what the final problem is.

loaded library "/home/jokubas/anaconda3/envs/Motion/lib/python3.9/site-packages/cv2/qt/plugins/platforms/libqxcb.so"

That is the path it is using, and what you would run the ldd on. However, I think that will show no problems, else instead of getting "loaded ..." you would get "Cannot load ...", like the link you reference shows.

QObject::moveToThread: Current thread (0x55ca7d32ff10) is not the object's thread (0x55ca7d871b20).
Cannot move to target thread (0x55ca7d32ff10)

I presume this is where your error is. I know nothing, but does your code do any thread creation/use any threads?

[ican95]

is there any update on this problem? I have the same error and no solution so far.

[raven-worx]

@ican95
this has been answered felt about a hundred times already here in the forums, always the same solution