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var PeerConnection = (window.PeerConnection || window.webkitPeerConnection00 || window.webkitRTCPeerConnection || window.mozRTCPeerConnection);
var nativeRTCIceCandidate = (window.mozRTCIceCandidate || window.RTCIceCandidate);
var pc = new PeerConnection(null);
var sdpConstraints = {'mandatory': {'OfferToReceiveAudio': true,'OfferToReceiveVideo': true}};
pc.onicecandidate = function(env){
if (env.candidate) {
ws.send(JSON.stringify({
"eventName": "_expert_result_appand",
"data": env.candidate.candidate
}));
}
};
pc.createOffer(function(session_description) {
pc.setLocalDescription(session_description);}, function(){}, sdpConstraints);