How to get the image buffer of videoOutput?

Code:

---

Rectangle {
        width: 320
        height: 240
 
        Camera{
            id: camera
        }
 
        VideoOutput {
            id: videoOutput
 
            anchors.fill: parent
            source: camera
        }    
 
        GammaAdjust {
            id: gammaAdjust
 
            anchors.fill: videoOutput
            source: videoOutput
            gamma: 0.5
        }
    }

---

The source of the videoOutput come from camera
then process by the GammaAdjust
How could I get the image after process?
Any workaround?

What do you mean by "get" the image? If you want to do some more manipulation before displaying the frame, you can use ShaderEffectSource.