main.qml

import QtQuick 2.0
import QtQuick.Window 2.0
import QtQuick.Controls 1.4
import QtQuick.Controls.Material 2.0
import QtGraphicalEffects 1.0
import QtQuick.Controls.Styles 1.4
import QtMultimedia 5.8
import FaceFilter.uri 1.0

ApplicationWindow {
    visible: true
    width: Screen.desktopAvailableWidth
    height: Screen.desktopAvailableHeight
    title : "Test"
    id : mainwindow

    Camera{
        id: camera
    }

    Rectangle {
    width: 1080
    height: 640
        anchors.centerIn : parent

        FaceFilter {
            id: filter
        }

        VideoOutput {
                filters: [ filter ]
                id: cameraDisplay
                source: camera
                anchors.fill: parent
                focus : visible // to receive focus and capture key events when visible
            }
      }
}