WebRTC Conference Prototype Implementation

1. 
Conference Implementation
2013 / 3 / 11
NCTU CS
Hung Yu Chen

2. Introduction
 Webrtc.js
 Demo
 Conclusion
 Reference


3. Brief & Short Review

4. <video/>
<audio/>

5. Open Standard
 Open Source
 GIPS Codec Engine
 Echo Cancellation
 Packet Loss Concealment
 NAT Traversal
 Jitter Buffer
 Cross Browser
 No Plugins

 Pure JavaScript APIs

7. 
Web API
 MediaStream
 PeerConnection
 DataChannel

Equip browsers with one-to-one communication ability

8. Javascript API for Conference

9. 
Init
createStream()
• getUserMedia()
connect()
• Connect to the server
createRoom() / joinRoom()
initChat()
• RTCDataChannel / Websocket

10. 
Join Room
createPeerConnections()
• RTCPeerConnection API
addStreams()
addDataChannels()
sendOffers()

11. init
Peern
Peern+1
sendOffers
joinRoom
sendAnswers
Start the video/audio stream

12. 
Node.js
 Module
▪ Express
▪ Http
▪ webrtc.server.js
▪ As a WebSocket Server

13. 
Events
 Socket Events
▪ open, message, close
 Create/Join Room Request
▪ Room List
▪ Connection List
 SDP Exchange

14. WebSocket
Server
init
Peern
Peern+1
joinRoom

15. 
WebRTC needs four types of server-side functionality
 User discovery and communication.
 signaling.
 NAT/firewall traversal.
 Relay servers in case peer-to-peer communication fails.

18. 
Opportunities
 Special Video/Audio Applications
▪ Live Streaming through smart phone, etc.
 RTCDataChannel
▪ Browser-based p2p download, etc.
 Communicate with deferent devices
▪ PC Browser
▪ Smart TV
▪ Smart phone
▪ Pad

20. 
Real Time Communications without plugins


WebRTC Project


http://www.alanquayle.com/blog/2012/05/what-webrtc-means-to-telecoms.html
Node.js


http://www.youtube.com/watch?v=E8C8ouiXHHk
What WebRTC means to Telecoms


http://www.slideshare.net/loopingrage/webrtc-ecommconf-2011
Google I/O 2012 - WebRTC: Real-time Audio/Video and P2P in HTML5


http://www.webrtc.org/home
WebRTC - @eCommConf 2011


http://www.html5rocks.com/en/tutorials/webrtc/basics/
http://nodejs.org/
Node.js – Express Module

http://expressjs.com/