Tracking data apply to a mask

[Simon Bonner]

Not strictly. You can only apply tracking data to a layer, not a mask. One way to solve your problem would be to apply tracking data to a null, and then parent the layer with the mask to your null. If the layer with the mask is your footage layer, duplicate it and remove the mask from the bottom layer. Then set the track matte of the bottom layer to alpha / alpha inverted, depending on how you want the mask to function.

Simon Bonner

youtube.com/simonsaysfx