There may be a plug in to

There may be a plug in to do this, and it would certainly be easier if the camera was stationary but without actually having done this (and someone will correct me if I’m wrong I’m sure):

At first glance, in Vegas, I would save the several frames I wanted to freeze, rotoscope to isolate the person, place each “still” on a separate track with one track as a parent for motion control to match up with the camera motion and voila. The hardest part will be the motion control.