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PeerSquared
One on one online teaching through webRTC
PeerSquared uses webRTC:
Multiple webRTC peer connections for:
Local webcam stream
Remote webcam stream
Reliable (SCTP) datachannels

Datachannels to:
Set up new peer connections
Send files
Send text chat messages
Send whiteboard data
Currently only for PC:
Chrome
Firefox
Opera
(Interoperable between first two)
Works through Firewalls:
STUN (stun.l.google.com)
TURN (numb.viagenie.ca)
DEMO
www.peersquared.info
Problems I encountered:
Finding good documentation
Changing specs (work in progress)
Different vendor implementations
Missing onnegotiationneeded event
For now solved: multiple peer connections

Packet size limit of 16k (Chrome)
Solved by chunking data:
ArrayBuffer.slice(start, end)
String.slice(start, end)
Buffer size limit of 256k (Chrome)
Solved by checking the buffer:
Some traps:
Firefox puts ICE candidates in session description,
so check:
First call pConnection.createDataChannel
or pConnection.addStream, and then
pConnection.createOffer


THANK YOU!

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Peer squared - One on one online teaching through webRTC