usage: rcvface <facehost> [<relay>] facehost: name/addr of face detector relay: relay addr [optional] face [<dev>] [<relay>] dev: video device number [0-3]; default 0 relay: optional relay host (alternatively, face can get relay address from FACERELAY environmenet variable) zproxy can be used as a relay if direct connection between detector and receiver is unavailable dependencies: OpenCV 3.2 http://opencv.org/downloads.html Zeromq 4.2 http://zeromq.org on OSX: brew tap homebrew/science; brew install opencv3 zeromq