session.createStream({name:'stream1', constraints:{audio: true, video:{deviceId:'camera1'}}}).publish();
session.createStream({name:'stream2', constraints:{audio: true, video:{deviceId:'camera2'}}}).publish();
var video = document.getElementById("videoInput");
for (i = 0; i < video.options.length; i++) {
...
room.publish({
display: document.getElementById("localDisplay"),
constraints: constraints,
record: false,
receiveVideo: false,
receiveAudio: false
});