Johan Walles writes:
I just made an add-on for finding bad tracks when motion tracking.
The idea is that if all markers move to the right in a frame, except one marker that moves to the left, the marker moving to the left is suspicious and needs looking into.
For me, the top list and badness scores produced by Find Bad Motion Tracks has been much more helpful than looking for tracks with high reprojection errors which is what I did before.
Developed and tested on Blender 2.93.1.
It works for me, do try it, version number is 0.0.1 for a reason, all initial-release disclaimers apply, please report problems!