Motion detect или компьютерное зрение.

[stD]

motion.conf

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######################################## ####################
# Live Webcam Server
######################################## ####################

# The mini-http server listens to this port for requests (default: 0 = disabled)
webcam_port 8082

# Quality of the jpeg (in percent) images produced (default: 50)
webcam_quality 50

# Output frames at 1 fps when no motion is detected and increase to the
# rate given by webcam_maxrate when motion is detected (default: off)
webcam_motion 25

# Maximum framerate for webcam streams (default: 1)
webcam_maxrate 25

# Restrict webcam connections to localhost only (default: on)
webcam_localhost off