Unable to track green screen stock video

Hi all, new to this but wanted to trying tracking a green screen in After Effects 2019 with the use of Mocha.
I have stock video with already a green screen on a desktop PC monitor so I thought this would be easy for Mocha.

However, I have located the screen and put an x-spline

but the blue screen location doesn’t track properly the more frames it gos through the more the alignment drops out, I this makes sense? image included

Draw your x spline much, much closer to the edges of the screen and you should get better results. You’re tracking a lot of the background as well as the FG person in that shape. Remember, the shape is where the track is looking, the surface is what the track is doing.


1 Like