How can I rotate QCameraViewFinder to 90 degree

[Roser]

I'm using USB camera,but the orientation is not what I'm wanted,it's horizontal,I need it be vertical.
So I turn the USB camera to 90 degree,but the video stream was follow the camera to 90 degree.
Then I need rotate the QCameraViewFinder to 90 degree to fix it.
But I can't find a way to do it.
How can I do it?

I don't need the way of use QGraphicsView,cause it have something wrong in TabWidget,I have tried it.

This is the current videofinder:

[SGaist]

Hi and welcome to devnet,

I am not sure there's a direct way to do that within Qt.

One possible solution could be to create your own QAbstractVideoSurface and do the conversion there.

See also the Camera Overview in Qt's documentation.

[Roser]

@SGaist Ok, thanks.