QML Camera does not stay FULL SCREEN

I'm developing an application that requires the front camera to occupy the entire background screen, style the snapchat application, but using QML the camera with spacing at the top and bottom of the camera. QML Responsible for the camera:

import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Layouts 1.1
import QtMultimedia 5.5
import QtQuick.Window 2.2

Item {
    id: item1
    width: 720
    height: 1080

    property alias camera: camera
    property alias video: video

    Camera {
        id: camera

        imageProcessing.whiteBalanceMode: CameraImageProcessing.WhiteBalanceFlash

        flash.mode: Camera.FlashRedEyeReduction

    }

    VideoOutput {
        id : video
        anchors.fill: parent

        orientation: -90
        source: camera
        focus : visible // to receive focus and capture key events when visible
    }

}