what is the difference between : facial recognition for video stream, or 4-ch facial recognition for face picture- coz i have 3 face detection camera on DS-7716NXI-K4 but it's support only one.
Face Detection and Face capture are two different things, if your camera only have face detection it will only work 1ch for facial recognition (or no face detection too) will work in one channel only. If your camera have Face Capture then the 4ch will work!
