Continuing the Analysis with a Different Reference Feature

You can continue the analysis with a different reference feature if the one you are tracking moves out of the frame or changes to such a degree it is no longer usable as a reference feature.

The Tracker uses the offset between the old and new reference features to calculate the shift values of the old reference feature.

That is, it locates the new reference feature and, from its location, determines where the old reference box would be located. It then calculates the shift values for the old reference box and uses these to complete the track.

To continue the analysis with a different reference feature:

1. Pause the analysis when the Tracker loses its reference feature.
2. Return to the last good keyframe. This frame must contain both the current reference feature and the intended new one.
3. Select the reference box and drag it to the new reference feature.
4. Restart the analysis.