How to use kurento-media-server for audio only stream?

Question

I want to have only audio stream communication between peers , I changed the parts of kurento.utils.js to get only audio stream via getusermedia but it's not working
I used this example node-hello-world example

WebRtcPeer.prototype.userMediaConstraints = {
    audio : true,
    video : {
        mandatory : {
            maxWidth : 640,
            maxFrameRate : 15,
            minFrameRate : 15
        }
    }
};

to

WebRtcPeer.prototype.userMediaConstraints = {
    audio : true,
    video : false
};

is it possible use kurento service for only audio stream?

igracia · Accepted Answer · 2016-03-17T15:11:05.660

6

This is indeed possible with Kurento. There are two ways of doing this, depending on the desired scope of the modification:

Per webrtc endpoint: when you process the SDP offer sent by the client, you get an SDP answer from KMS that you have to send back. After invoking the processOffer method call, you can tamper the SDP to remove all video parts. That way, your client will send back only audio.
Globally: You can edit /etc/kurento/sdp_pattern.txt file removing all video related parts, this will force SdpEndpoints (parent class of WebrtcEndpoint) to only use audio.

EDIT 1

The file sdp_pattern.txt is deprecated in KMS 6.1.0, so method 2 shouldn't be used.

EDIT 2

There was an issue with the kurento-utils library, and the client was not correctly setting the OfferToReceiveAudio. It was fixed some time ago, and you shouldn't need tampering the SDPs now.

edited Mar 17 '16 at 15:11

answered Mar 12 '15 at 10:15

igracia

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So, what is the new solution after all the edits? I'm trying mediaConstraints: {audio:true} and it just never connects in the hello-world example. – Dobes Vandermeer Oct 06 '16 at 05:27
@DobesVandermeer `{audio : true, video : false}` should be working fine. Is it not working for you? – igracia Oct 06 '16 at 08:50
Actually I did get it working that way, I should create a pull request with my audio-only example. – Dobes Vandermeer Oct 07 '16 at 16:09
@DobesVandermeer Well, there's already one [here](https://github.com/Kurento/kurento-tutorial-java/blob/master/kurento-hello-world-recording/src/main/resources/static/js/index.js#L221) – igracia Oct 07 '16 at 16:11

score 1 · Answer 2 · answered Jan 11 '17 at 05:32

1

git origin: https://github.com/Kurento/kurento-tutorial-js.git git branch: 6.6.0

My solution is only changing var offerVideo = true; to var offerVideo = false; in generateOffer function of kurento-utils.js file.

answered Jan 11 '17 at 05:32

Janu zhou

31
6

score 1 · Answer 3 · edited Mar 28 '17 at 10:03

1

My approach is to modify the options that you pass to the WebRtcPeer.

var options = {  
  onicecandidate: onIceCandidate,  
  iceServers: iceServers,  
  mediaConstraints: {  
    audio:true,  
    video:false  
  }  
}

Besides, in the kurento-utils.js, the mediaContraints is overidden by this line:

constraints.unshift(MEDIA_CONSTRAINTS);

So comment it.

edited Mar 28 '17 at 10:03

M Hamza Javed

1,269
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answered Mar 28 '17 at 08:19

Nguyen Nhat Quang

11
1
1

How to use kurento-media-server for audio only stream?

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