QT open front and back camera on IOS simutancely

[binhtv]

Hi all, When i start to create an application to open both camera simutancely using QtMultimedia. I check on Macos OS it can worked. But on IOS, just one camera can be start at the once time. I check on the ios official website, i can see we can open 2 camera simutancely at link:
https://developer.apple.com/documentation/avfoundation/capture_setup/avmulticampip_capturing_from_multiple_cameras?language=objc.
I clone the swift source code and it's worked.
Could anyone help me or give me a solution to do it. Thank you so much.