show() vs showFullScreen()

[antweb]

I am making an application to view an IP Camera on a Video Widget.
When I make my MainWindow show(), the camera works perfectly well without any lag but of course I get the top bar.
When I use ShowFullScreen(), my camera generates a significant lag.
I find this rather strange. What can be the reason?

[anda_skoa]

Is the size of the video display area the same or is it larger when you use show full screen?

If the latter, then maybe you are hitting a limitation of how many pixels can be processed in a given time frame.

Cheers,
_