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pelegs

Member

Registered: 2020-10-18

Posts: 31

[SOLVED] python-opencv error: undefined symbol

Full python error:

ImportError: /usr/lib/libopencv_highgui.so.412: undefined symbol: _ZN9QtPrivate17expectedAllocSizeEmm, version Qt_6

I got this when I tried to import cv2 into python (3.11 in my case) after installing the python-opencv package (version 4.12.0-10).

I uninstalled the package, and installed python-opencv via pip:

pip install opencv-python --break-system-packages

And now it works ok.

I'm not sure if I should make a full bug report or not, to me it seems that the issue is with the upstream, not the packaging. But I'm far from experienced in this.

mithrial

Member

Registered: 2017-03-05

Posts: 112

Re: [SOLVED] python-opencv error: undefined symbol

I don't think the intended use of python-opencv is with Python 3.11. If you really want 3.11, use a virtualenv for your project.

arojas

Developer

From: Spain

Registered: 2011-10-09

Posts: 2,239

Re: [SOLVED] python-opencv error: undefined symbol

I'm not sure if I should make a full bug report or not, to me it seems that the issue is with the upstream, not the packaging. But I'm far from experienced in this.

Yes, this is a packaging issue. opencv was compiled with Qt 6.10 in testing and moved to extra ahead of time.