fixed qml issue

src/res/qml/common/mainwidget.qml

@@ -5,6 +5,7 @@ import ".."
 import "../utilities_page"
 import "../audio_page"
 import "../motion_page"
+import "../video_page"
 
 Rectangle {
     id: root
@@ -71,6 +72,11 @@ Rectangle {
         visible: false
     }
 
+    property VideoPage videoPage: VideoPage {
+        stackView: mainView
+        visible:false
+    }
+
     StackView {
         id: mainView
         anchors.fill: parent

src/res/qml/video_page/VideoPage.qml

@@ -6,12 +6,13 @@ import "../common"
 import "brightness"
 
 MyStackViewPage {
+    width: 1200
     headerText: "Video Settings"
 
     content: ColumnLayout {
         spacing: 18
 
-        BrightnessGroupBox { id: brightnessGroupBox }
+        BrightnessGroupBox { }
 
         Item {
             Layout.fillHeight: true