Overlaying the CameraUI component with a png?

To answer my own question.

The only way you overlay the camera image is if you avoid the CameraUI class and capture the camera image in the traditional way (see below).

private function findCamera():void {   if (!Camera.isSupported)   {     return;   }        var cam:Camera = this.getCamera(CameraPosition.BACK);        cam.setMode(960, 480, 30);        var video:Video = new Video(960, 480);        video.attachCamera(cam);        addChild(this.video);   }   // Get the requested camera. If it cannot be found,   // return the device's default camera instead. private function getCamera(position:String):Camera   {        for (var i:uint = 0; i < Camera.names.length; ++i)        {             var cam:Camera = Camera.getCamera(String(i));             if (cam.position == position) return cam;        }      return Camera.getCamera();   }