i have found how to do this.
here is one way in WPF using Canvas
private void buttonPlayVideo_Click(object sender, RoutedEventArgs e)
{
Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
dlg.Filter = "All Files|*.*";
Nullable<bool> result = dlg.ShowDialog();
if (result == true) {
MediaPlayer mp = new MediaPlayer();
mp.Open(new Uri(filename));
VideoDrawing vd = new VideoDrawing();
vd.Player = mp;
vd.Rect = new Rect(0, 0, 960, 540);
DrawingBrush db = new DrawingBrush(vd);
canvas.Background = db;
mp.Play();
}
}
</bool>
then create mouse events for Canvas and draw with it
Point startPoint, endPoint;
private void canvas_MouseDown(object sender, MouseButtonEventArgs e)
{
startPoint = e.GetPosition(canvas);
}
private void canvas_MouseUp(object sender, MouseButtonEventArgs e)
{
endPoint = e.GetPosition(canvas);
Line myLine = new Line();
myLine.Stroke = System.Windows.Media.Brushes.LightSteelBlue;
myLine.X1 = startPoint.X;
myLine.Y1 = startPoint.Y;
myLine.X2 = endPoint.X;
myLine.Y2 = endPoint.Y;
myLine.HorizontalAlignment = HorizontalAlignment.Left;
myLine.VerticalAlignment = VerticalAlignment.Center;
myLine.StrokeThickness = 2;
canvas.Children.Add(myLine);
}