Important: Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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



  • 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)
    
    
    


  • @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?


Log in to reply