webRTC说明

https://www.html5rocks.com/en/tutorials/webrtc/basics/

https://codelabs.developers.google.com/codelabs/webrtc-web/#0

https://bitbucket.org/webrtc/codelab

https://www.html5rocks.com/en/tutorials/webrtc/infrastructure/

https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API

https://www.w3.org/TR/webrtc/#simple-example

https://www.w3.org/TR/webrtc/#getstats-example

https://webrtc.org/start/

https://ivweb.io/topic/58aae3fa59edf3683ec76c07