Video in wpf with frame access

You can use a winforms control in WPF, so I'd think you want to create a control that uses DX to do what you want, and then insert it that way. I've found that using those sort of controls can create rendering issues, I did that to import a winforms windows media player control, because of how bad the video support is in WPF ( it's truly awful, and I wasn't trying to do anything as complex as what you want to do ).
 
WPF IS DirectX though, so I'd have hoped there would be a way to create something that uses DirectX directly, without a winforms layer in the middle.