class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    StreamController controller = StreamController();
    sc2GetLivePreview(controller, frames: 300);
    return Scaffold(
// your ui
//
Expanded(
    flex: 8,
    child: StreamBuilder(
        stream: controller.stream,
        builder: (BuildContext context, AsyncSnapshot snapshot) {
        if (snapshot.hasData) {
            var imageData = Uint8List.fromList(snapshot.data);
            return Image.memory(
            imageData,
            gaplessPlayback: true,
            );
        } else {
            return Container();
        }
        }),
),