Is the camera panning? or lock down?
You’d have to get the guy to walk across the scene @ the exact same pace both times, same steps. Could make steps on the ground. Have someone with a stop watch.
Then, morphing software would be the best choice here.
Could pull something off in AE.
Could shoot a rough no thrills test anyway.
A side view my yield less then dramatic results.
Walking towards the camera will make more impact.
Chris Tompkins
Video Atlanta LLC