WebRTC Firefox: Not enough arguments to RTCPeerConnection.setLocalDescription
问题 I'm developing a web platform with WebRTC to create a peer-to-peer video conversation for interviews. The communication is established with ASP.NET SignalR. Here's the javascript for the connection establishment: function initInterview() { //Gets user's media navigator.getUserMedia({ video: true, audio: true }, function (stream) { // Display local stream to the user var localMediaElem = document.querySelector('video#me'); localMediaElem.volume = 0.0; localMediaElem.srcObject = stream; //