Web rtc summary
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WebRTC allows for real-time communications directly in the browser via JavaScript APIs. It aims to enable rich, high-quality real-time communications applications. The first implementation was built by Ericsson in 2011 and it has since progressed, with Firefox and Chrome achieving interoperability in 2013. The key APIs included are MediaStream for camera/mic access, PeerConnection for audio/video calls, and DataChannels for other data transfer like in gaming. Signaling is needed to exchange session information before peer-to-peer streaming can begin. WebRTC continues to be supported by browsers and has potential uses like video chat, file sharing, and real-time collaboration.
Web rtc summary
- 1. WebRTC Summary Simplex Internet / Research Institute / Jeong, Ki-Chul 2013. 5. 23
- 2. WebRTC? • Real-Time Communications (RTC) Web+RTC • via simple Javascript APIs • Open project supported by Google, Mozilla, Opera
- 3. Mission • To enable rich, high quality RTC Application To be developed in the browser Via HTML5 + Javascript API
- 4. History • May 2011, Ericsson built the first implementation • Oct 2011, First Public Working Draft - W3C • Feb 2012, WebRTC Native APIs 2.0 (libjingle r115) • June 2012, WebRTC Session at Google I/O • Feb 2013, Firefox and Chrome interop achieved • May 2013, WebRTC Session at Google I/O .. ...
- 5. APIS
- 6. MediaStream • aka getUserMedia • Get access to data streams - Camera and MIC
- 8. Use case of MediaStream • like Photobooth on mac • + CSS : Filter, Effect .. • + Canvas : Snapshot .. • + PeerConnection : Video Chat .. • + JS : Face detection …
- 9. Signaling • not part of the PeerConnection API • whatever messaging protocol they prefer SIP or XMPP, WebSocket, appropriate… • The exchange of information via signaling must have completed successfully before peer-to-peer streaming can begin.
- 11. Signaling sample
- 12. 3 types of information to exchange • Session control messages to initialize communication to close communication to report errors • Network configuration • Media capabilities codecs, resolutions
- 13. PeerConnection • audio or video calling with facilities for encryption&bandwidth management • Create a peer instance • Most important API of 3
- 17. DataChannels • Like websocket, but peer 2 peer • Other types of data, not audio/video • Use case Gaming, text chat, file transfer, …
- 20. WebRTC Service • TowTruck website to collaborate in real-time • PeerCDN P2P CDN private beta, currently only chrome • Veckon WebRTC Video Chat • Vline WebRTC for integration
- 21. References • HTML5rocks WebRTC • W3C WebRTC • WebRTC Official Site • Ericsson Lab • ICE, TURN and STUN for NAT Traversal
- 22. THANKS