Moving crop filter window over time?

Hi, is there any way to move the crop window over time, following a path maybe?

I’m cropping a 720 window from a 1080 video clip and would like to start with the window in the bottom for a third of the clip, move the window to the top over a few seconds of footage and remain there for the remainder, etc.


Panning [or any animation] requires key frames which Shotcut doesn’t have - though they are planned for the future.