https://unix.stackexchange.com/questions/1670/how-can-i-use-ffmpeg-to-split-mpeg-video-into-10-minute-chunks https://scotch.io/bar-talk/build-a-realtime-chat-server-with-go-and-websockets http://www.smartjava.org/content/face-detection-using-html5-javascript-webrtc-websockets-jetty-and-javacvopencv
https://webrtc.github.io/samples/ https://github.com/webrtc/samples/blob/gh-pages/src/content/getusermedia/gum/js/main.js
dependencies: https://github.com/hybridgroup/gocv
brew install opencv
brew upgrade opencv