Why only live feed?
Why only live feed?? Make also a footage option and not only live feed. The face track feature works great in AE, no reason not to have it in CA. It's all there, just let us have it!:)
David Simons (Adobe) commented
Sorry we haven't had time to implement this yet.
In the meantime, you can copy/paste the face tracking data from AE and paste into Ch. See the answer to this post: https://www.reddit.com/r/AfterEffects/comments/43uyfb/can_you_export_aes_face_track_data/
Another option is to use a tool like manycam.com that can pipe a video file into a virtual webcam.