Planar Tracker Roto

Hello,

When using the planar tracker for roto work, it doesn't seem possible to animate the shape used for the track and the resulting mask output. It seems as if the shape is set to no animation because any change affects the shape on every frame. Am I missing something?

Also, the control points for the shape get smaller and smaller as the shot goes through so its almost impossible to drag the shape's control points later in the shot. Anyone else seeing this?

DC