Flickering light in footage

Hi there I am trying to track a persons open palm in a shot. Their hand does not move much but the light in the shot is flickering on and off.

Its not turning black just brightly lit to dimly lit, it happens quite quickly.

I changed my tracking option from Input Channel from Luminance to Auto Channel. but my track is terrible and keeps popping in and out in size.

Is there a way around this that I am missing?

Thanks in advance.

Are you drawing your shape outside the edges of the palm? Mocha gets it’s best results when you don’t just track the internal texture of the object, because it allows it to get a better idea of the overall motion when it can define the foreground and background.

I was not doing that. I am going to try that now. Thanks for the tip!!