Failed to add some remote candidates (added 1, expected 2)

General
1

Hi Everyone, please assist.

I am able to publish a live video stream but when i subscribe to it, nothing is rendered on the page.

Currently running this locally.

When i start the Janus server, the log shows:

Initializing ICE stuff (Full mode, ICE-TCP candidates disabled, half-trickle, IPv6 support disabled)
STUN server to use: stun.l.google.com:19302
  >> 74.125.27.36:19302 (IPv4)
Testing STUN server: message is of 20 bytes
  >> Our public address is 172.139.156.5
TURN server to use: localhost:3478 (udp)
TURN REST API backend: (disabled)

When i publish a new live stream, the janus server log shows:



HTTP transport timer started
HTTP webserver started (port 8088, /janus path listener)...
Admin/monitor HTTP webserver started (port 7088, /admin path listener)...
JANUS REST (HTTP/HTTPS) transport plugin initialized!
Creating new session: 3112666674173711; 0x6000017d80a0
Creating new handle in session 3112666674173711: 7033155524207313; 0x6000017d80a0 0x11a004770
[7033155524207313] Creating ICE agent (ICE Full mode, controlled)
[7033155524207313] The DTLS handshake has been completed
[janus.plugin.videoroom-0x600003ae8030] WebRTC media is now available

When i subscribe to that live stream, the janus server log shows:

The warning i keep getting is “Failed to add some remote candidates (added 1, expected 2)”

creating new session: 7140347901636727; 0x6000017d4960
Creating new handle in session 7140347901636727: 1130652029014476; 0x6000017d4960 0x11a0048b0
[WARN] Deprecated subscriber 'join' API: please start looking into the new one for the future
[1130652029014476] Creating ICE agent (ICE Full mode, controlling)
👉[WARN] [1130652029014476] Failed to add some remote candidates (added 1, expected 2)👈
[1130652029014476] The DTLS handshake has been completed

I checked admin API for SDP details:

For Publisher:


"plugin_specific": {
      👉"type": "publisher",
    },
"streams": [
            {
               "type": "audio",
               "mindex": 0,
               "mid": "0",
               "codec": "opus",
               "audio-level-dBov": 0,
               "talking": false,
            👉"subscribers": 1 
            },
 "flags": {
      👉"got-offer": true,
      👉"got-answer": true,
      👉"negotiated": true,
}

For Subscriber:


"plugin": "janus.plugin.videoroom",
      "plugin_specific": {
    👉 "type": "subscriber",
         "room": 1234,
         "private_id": 0,
         "answered": true,
         "pending_offer": false,
         "pending_restart": false,
         "paused": false,
         "streams": [
            {
               "type": "audio",
               👉"active": true,
               "mindex": 0,
               "mid": "0",
               "ready": true,
            👉"send": true,
           👉"feed_id": 302664780087,
               "feed_display": "Publisher",
               "feed_mid": "0",
               "codec": "opus"
            },
            {
               "type": "video",
               👉active": true,
               "mindex": 1,
               "mid": "1",
               "ready": true,
               "send": true,
           👉"feed_id": 302664780087,
               "feed_display": "Publisher",
               "feed_mid": "1",
               "codec": "vp8"
            }

Inside the subscribe.js file, i realised that “onremotestream” is not invoked since there’s no log with “Currently receiving the video stream”

subscribe.js 

        function startViewer() {
            // Initialize the library (all console debuggers enabled)
            Janus.init({
                debug: "all",
                callback: function() {
                    // Make sure the browser supports WebRTC
                    if(!Janus.isWebrtcSupported()) {
                        alert("No WebRTC support... ");
                        return;
                    }
                    // Create session
                    janus = new Janus({
                        server: "ws://localhost:8188",
                        success: function() {
                            // Attach to VideoRoom plugin as a subscriber
                            janus.attach({
                                plugin: "janus.plugin.videoroom",
                                success: function(pluginHandle) {

                                    videoroom = pluginHandle;

                                    var selectedPublisherId = 5516362373519243;//Hard coded for now, but this will be dynamic
                                    
                                    console.log("Plugin attached! (" + videoroom.getPlugin() + ", id=" + videoroom.getId() + ")");
                                    
                                    // Join the room
                                    var register = { "request": "join", "room": 1234, "ptype": "subscriber", "feed": selectedPublisherId}; // Update room ID
                                    
                                    videoroom.send({"message": register});
                                },
                                onremotestream: function(stream) {
                                    // THIS PART DOES NOT RUN
                                👉console.log("Currently receiving the video stream");
                                    var video = document.getElementById('remoteVideo');
                                    Janus.attachMediaStream(video, stream);
                                },

I have been trying to get this running for a few days and reading documentation, but cannot solve this. I can provide more details if needed. Any help will be appreciated. Thanks.