Animating a trace line of a moving object

Question

Hello, I am very new to AE, so please excuse my lack of background. I do have some familiarity with Premier Pro.

I would like to draw a line that traces the movement of an object in a still frame, much like in this video:

I have some overhead drone footage of me holding a marker and walking in a spiral. I would like to animate a line that follows the marker, ending up with a drawing of my movement.

I have got as far as motion tracking the marker. I'd like to do something like converting those keyframes into a shape path that I can then animate. I'd like to avoid having to trace the path manually if possible, as I've got a few of these to do. Any help would be much appreciated. TIA

Warren Heaton · Answer

Hi, @layan_7202:Track the motion of the object. Then apply the Write-on effect and link the Write-on Brush Position to the Motion Tracker Attach Point. Adjust the other Write-on parameters so that your line has the preferred appearance.  - Warren

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