OK, seems like shadow casting on the default light might be broken. Turning it on caused the scene to crash.
i think you have to use another QMediaPlayer instance designated for the preview frames.
There is an example application showing this (taken from here).
Just as a note.
You can visually design the UI in Designer and then just grab the c++ code. ;)
If you look inside the setupUI, there is the code for what u have"drawn"
Something like SVG ?
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