Magix Movie Edit Pro (Plus/Premium) and Video Pro X have a feature to load or create masks, animated or static, to use with an effect, say, to blur a faces or faces, using Xara Designer Pro X or Xara Photo & Graphics Designer, if either is installed on your computer. To Create a mask, Xara is opened by the video editor in animation mode and the video advances allowing you to create, move and resize a mask or masks to follow the action. The masks are tweened by Xara to smoothly change size and shape.
John CB