How to put an x to mark an object in a video?

I am supposed to detect an object in a video, find its centroid and mark that centroid by an x. I know how to get the centroid coordinates for each frame, but I don't know how to use them to get the centroid marked during playing that video. Any help? Thanks.

Answer 1

[Image Analyst]

Just use text() or line() to put something in the overlay at the desired coordinates during playback.