The magic is knowing when to take a new reference photo, in case someone else walks in, or I drink from a cup of coffee, or hold up an object to the camera. At

The magic is knowing when to take a new reference photo, in case someone else walks in, or I drink from a cup of coffee, or hold up an object to the camera. At which point we're almost back to H.264, except it's unclear if that will work without additional training.