QCameraImageProcessing fails to set settings on linux v4l2 camera

Target information:

Problem information:
When accessing a linux v4l2 camera via QCamera, and trying to access any of the parameters via the QCameraImageProcessing class, it does not work and produces the following warning:

Unable to open the camera "/dev/video0" for read to get the parameter value: "Device or resource busy"

Attached is a minimal reproducer, although this problem is platform (and possibly driver) specific

This is due to Qt trying to acquire the /dev/video0 device once gstreamer has acquired it. Modifications to the qt CameraBin gstreamer plugin were tested to resolve this which were successful. This was done by either using g_object_set(...) to change the parameters that the v4l camerabin GstElement provide or by requesting the open device file descriptor from gstreamer with g_object_get(...)