Hello,

I'm trying to modelling the movement of the dive of a Gannet from a boat video record.
I am confronted to the problem that I have no fixed point where I could set the origin, and since the boat -hence the video- is moving, the trajectory cannot be modelized just frame to frame.
Is there a way to set a mobil origin? Should I set it at each frame? In that case, is it possible to stack 2 images, so that I can point the same point frame after frame ?

I would be much grateful for any help

Laëtitia