private BitmapImage frameSource;
        public BitmapImage FrameSource
        {
            get
            {
                return this.frameSource;
            }
            set
            {
                this.frameSource = value;
                OnPropertyChanged("FrameSource");
            }
        }

 private void videoSourcePlayer_NewFrame(object sender, ref Bitmap image)
        {
            MemoryStream mem = new MemoryStream();
            image.SetResolution(300, 300);
            image.Save(mem, System.Drawing.Imaging.ImageFormat.Bmp);

            mem.Position = 0;
            BitmapImage imageOut = new BitmapImage();
            imageOut.BeginInit();
            imageOut.StreamSource = mem;
            imageOut.EndInit();
            this.FrameSource.Dispatcher.BeginInvoke(new MyDelegate(aaa), imageOut); //delegate() { this.Frame = image1; });
            mem.Close();

        }

        delegate void MyDelegate(BitmapImage imageOut);

        void aaa(BitmapImage imageOut)
        {
            this.FrameSource = imageOut;
        }

   private void videoSourcePlayer_NewFrame(object sender, ref Bitmap image)
        {
            if (App.Current != null)
                App.Current.Dispatcher.BeginInvoke(new MyDelegate(aaa), image);
        }


        delegate void MyDelegate(Bitmap image);

        void aaa(Bitmap image)
        {
            MemoryStream mem = new MemoryStream();
            image.SetResolution(300, 300);
            image.Save(mem, System.Drawing.Imaging.ImageFormat.Bmp);

            mem.Position = 0;

            BitmapImage imageOut = new BitmapImage();
            //imageOut.
            imageOut.BeginInit();
            imageOut.StreamSource = mem;
            imageOut.EndInit();
            this.FrameSource = imageOut;
            mem.Close();
        }