DrawingContext.DrawVideo Method (MediaPlayer, Rect)
Draws a video into the specified region.
Assembly: PresentationCore (in PresentationCore.dll)
Note that the media will be stretched to fit inside the area defined by the rectangle parameter. If rectangle and media have different aspect ratios, distortion will occur. For more control over how media is used to fill an area, use the DrawRectangle command to draw a rectangle and fill it with a VisualBrush that contains media.