[bug PyQt 5.15.2] segmentation fault using QVideoFilterRunnable

Adrian Fiergolski adrian.fiergolski at fastree3d.com
Wed Feb 10 17:53:39 GMT 2021

On 10.02.2021 18:35, Phil Thompson wrote:
> On 10/02/2021 16:30, Adrian Fiergolski wrote:
>> Hi,
>> I am getting segmentation fault using QVideoFilterRunnable. I try to
>> follow the example from the documentation.
>> I am enclosing the testcase and the log from the debugger (gdb).
>> My setup: yocto (with meta-qt5 gatesgarth, PyQt 5.15.2) running on
>> Cortex A-53, kernel 5.4).
>> I got the same issue with PyQt 5.13.2 on my embedded platform. The
>> problem is reproducible on a PC (running Ubuntu 20.04 with installed
>> qt5-default and pyqt5-dev).
>> Once the filter is commented out (case.qml:17), everything runs
>> smoothly.
>> Do you know any workaround for that? I need to process data from a
>> camera in OpenCV (I wanted to do it the QVideoFilterRunnable:run) and
>> paint the resulting processed frame.
> I suspect that this needs hard-coded support for QVideoFilterRunnable
> in the same way that PyQt supports QValidator in QML.
> There is no workaround that I'm aware of.

Hi Phil,

Thank you for your reply. I am new to Qt. Could you elaborate on your


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