[Interest] QVideoProbe video frames upside down

Tomasz Wcislo wtom95 at gmail.com
Tue Jul 17 16:58:25 CEST 2018

Hello everyone,

I'm working on a video conferencing app, and I have trouble converting
QVideoFrames to QImages.
I get the frames from a QVideoProbe attached to a QCamera, and I display
them in a QLabel using this code:

    QVideoFrame vf(frame);


    m_lastFrame = QImage(vf.bits(), vf.width(), vf.height(),



The problem is the following: the frames are upside down and I have to
apply a QTransformation to flip them:


Why are they upside down? Will it be the case on each computer? (as
the frames will be displayed on different computers, I don't want them
to be flipped incorrectly on certain devices).

Any help would be greatly appreciated!
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