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I'm trying to use OpenCV with PyQt5 on Linux, but encountering Qt compatibility issues. When I install opencv-python, I get Qt platform plugin errors that prevent the application from starting. When I switch to opencv-python-headless, the application runs but cv2.imshow() doesn't work.

I expect OpenCV windows to display properly alongside my PyQt5 application, but instead:

  • With opencv-python: Qt platform plugin "xcb" initialization fails.

  • With opencv-python-headless: Application runs but cv2.imshow() shows no windows.

Error messages:

  • With opencv-python:
QObject::moveToThread: Current thread (0x37cc2f70) is not the object's thread (0x37a70930).

Cannot move to target thread (0x37cc2f70)

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/home/jahid/airsim_env/airsim_env/lib/python3.8/site-packages/cv2/qt/plugins" even though it was found.

This application failed to start because no Qt platform plugin could be initialized.

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

Aborted (core dumped)
  • With opencv-python-headless:

No errors, but cv2.imshow() creates no visible windows.

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