movie - WPF MediaElement with rounded corner -


in wpf, wish create rounded corner movie, movie overlap border , normal rectangle box load movie. idea how solve issue? enter image description here

<border borderbrush="#ff000000" borderthickness="1,1,1,1" cornerradius="20,20,20,20">     <grid>         <mediaelement x:name="movieloader" horizontalalignment="left" height="128" verticalalignment="top" width="236" source="../video/empty.mp4"/>     </grid> </border>

try this:

<border x:name="border" borderthickness="1" borderbrush="#ff000000" cornerradius="20" padding="1"         horizontalalignment="center" verticalalignment="center">     <grid>         <border name="mask" background="white" cornerradius="{binding elementname=border, path=cornerradius}"/>         <grid>             <grid.opacitymask>                 <visualbrush visual="{binding elementname=mask}"/>             </grid.opacitymask>             <mediaelement x:name="movieloader" horizontalalignment="left" height="128"                            verticalalignment="top" width="236" source="../video/empty.mp4"/>         </grid>     </grid> </border>

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