qml change the resolution before camera capture picture

[neda]

Hi
I want to display video with low resolution and capture image with the camera's highest resolution.
I used this code but the image was captured from camera with low resolution.

var w=camera.viewfinder.resolution.width;
var h=camera.viewfinder.resolution.height;
setMaxResulotion();
camera.imageCapture.capture()
camera.viewfinder.resolution.width = w;
camera.viewfinder.resolution.height = h;

var w=camera.viewfinder.resolution.width;
var h=camera.viewfinder.resolution.height;
setMaxResulotion();
camera.imageCapture.capture()
camera.viewfinder.resolution.width = w;
camera.viewfinder.resolution.height = h;

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