RenderTargetBitmap.Render() is not working well.

Question

Hello guys,
I am facing an Render(Visual) problem. I am using a simple Render(on MediaElement). It was working fine. However, if I add a border on it, or do HorizontalAlignment != Left, I got my video Render shifted and the rest will be black. For example, if my MediaElement is Aligned Vertical Center in a Grid, this means my MediaElement is shifted down. When I do render, it is render from the space before it is aligned to vertical center, so, I have some black on top and partial video render at bottom of my RenderTargetBitmap.

I believe Render() method is targeting the Visual from the original spot. If my MediaElement is shifted by Alignment, the Render() method's target area didn't shift along with it.

How do I resolve this? Thank you so much.

RenderTargetBitmap rtb = new RenderTargetBitmap(

(int)this.x_Player.ActualWidth, (int)this.x_Player.ActualHeight,

dpi.Width, dpi.Height, PixelFormats.Pbgra32);

rtb.Render(this.x_Player);

Answer 1

LOL NVM,
This is funny, I am being trying this for hours and now I just solved it in few minutes. So here is the trick I did. I just put my MediaElement in another container that will do Alignment LOL. Now my MediaElement doesn't move, thus, the Render() is good.

<Grid Height="200" Width="200">

<Grid HorizontalAlignment="Center" VerticalAlignment="Center">

<MediaElement Name="x_Player" IsHitTestVisible="False"

Stretch="Uniform" ScrubbingEnabled="True"

LoadedBehavior="Manual" UnloadedBehavior="Close"

MediaEnded="Player_MediaEnded" />

</Grid>

</Grid>

Answer 2

Thank you so much!

I am blocked by this problem just now, and I found here :)

yeah, just do another nesting, it will be OK!