Live streaming webcam with Janus

Question

I am trying to live stream video and audio from a user's webcam, with WebRTC. I cannot figure out how to do it with Janus Webrtc gateway, so that a person would stream webcam, and others can view it on another webpage.

I have installed Janus and I am able to connect with the Janus server with a browser. I attach the session to the streaming plugin, and then I create an offer with createOffer. The onlocalstream function is called, and I set the srcObject of my video element.

The broadcaster
I am able to attach the session to the streaming plugin like this:

janus.attach({
   plugin: "janus.plugin.streaming",    
    [...]

..then in the success handler I create an offer like this:

success: function(pluginHandle) {
    streaming = pluginHandle;
    var body = { "audio": { deviceId: { exact: audioSelect.value }},"video": { deviceId: { exact: videoSelect.value }} };
    streaming.createOffer({
        media: {
            audioSend: true,
            videoSend: true,
            audioRecv: false,
            videoRecv: false,
            audio: { deviceId: { exact: audioSelect.value }},
            video: { deviceId: { exact: videoSelect.value }}
       },
       success: function(jsep) {
           console.log("jsep = " + jsep);
           streaming.send({"message": body, "jsep": jsep});
       },
       error: function(error) { 
           console.log("error creating offer: " + error); 
       }
    });
},

The viewer
On the viewer's page I attach to the streaming plugin as well, and here I do not really know what to do. Do I create an offer with createOffer, or createAnswer?

And is the streaming plugin the correct plugin for what I want?

I do see an error on the Janus server when the broadcaster connects:
[ERR] [plugins/janus_streaming.c:janus_streaming_handle_message:3614] Missing mandatory element (request)

I want a user to stream webcam, and other users would see it (one-to-many broadcast). I have read this thread, and the user nschoe said that it is possible with Janus: WebRTC - scalable live stream broadcasting / multicasting

how you solved the problem? – Kalyan Halder Jul 02 '20 at 17:51 — Kalyan Halder, Jul 02 '20 at 17:51
I'm also trying to do this – harry young Jan 24 '21 at 23:23 — harry young, Jan 24 '21 at 23:23

Ripundeep Gill · Answer 1 · 2020-01-21T05:43:30.183

1

Recently I have faced this issue with a sample implementation using Python. Please try it by adding

media:{
    request:"request type"
    ....
}
Where "request type" can be list, info, create, destroy, recording, edit, enable and disable

You can get more information at its Streaming API documentation

edited Jan 21 '20 at 05:43

answered Jan 21 '20 at 05:37

Ripundeep Gill

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Live streaming webcam with Janus

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