FaceTracker is a plugin node for Foundry Nuke created for facial tracking without mocap rigs and markers. The tracking information can be later used for retouching, adding scars, relighting, face replacement, aging and de-aging, etc. For best results we recommend using it with FaceBuilder. FaceTracker is similar to GeoTracker but in addition to model’s position it also tracks facial gestures. Our tracking algorithms are stable contrary to neural networks solutions, precise, allow full manual control and don’t require any kind of on-stage preparation like facial motion capture rigs.
Source : https://www.keentools.io/facetracker