Webrtc screen sharing not working

[Amit Dhara]

We have created a chrome extension for webrtc screen sharing 

https://chrome.google.com/webstore/detail/learnmet-screenshare-exte/ckomocobcdpchgipgdhdbgkbpofhheig

When we are trying to share screen, it is showing screen is being shared but other person is not able to see my screen. 

The BBB server is deployed into AWS

Here is the output for bbb-conf --check

BigBlueButton Server 2.0.0-beta (1261)

Kernel version: 4.4.0-1066-aws

                      Distribution: Ubuntu 16.04.4 LTS (64-bit)

                            Memory: 15657 MB

/var/www/bigbluebutton/client/conf/config.xml (bbb-client)

  Port test (tunnel): rtmp://meet.example.com

                              red5: live.learnmet.com

              useWebrtcIfAvailable: true

/opt/freeswitch/etc/freeswitch/sip_profiles/external.xml (FreeSWITCH)

                         websocket: :7443

                    WebRTC enabled: true

/etc/nginx/sites-available/bigbluebutton (nginx)

                       server name: meet.example.com

                              port: 80, [::]:80

                              port: 443 ssl

                    bbb-client dir: /var/www/bigbluebutton

/var/lib/tomcat7/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties (bbb-web)

                      bbb-web host: meet.example.com

/var/lib/tomcat7/webapps/demo/bbb_api_conf.jsp (API demos)

                               url: meet.example.com

/usr/share/red5/webapps/bigbluebutton/WEB-INF/red5-web.xml (red5)

                  voice conference: FreeSWITCH

/usr/local/bigbluebutton/core/scripts/bigbluebutton.yml (record and playback)

                     playback host: meet.example.com

/usr/local/bigbluebutton/bbb-webrtc-sfu/config/default.yml (Kurento)

                        kurentoUrl: ws://zz.197.12x.xx:8888/kurento

                         kurentoIp: xx.100.2.yy

                    localIpAddress: xx.100.2.yy

               recordScreenSharing: true

                     recordWebcams: true

Where zz.197.12x.xx is public IP 

and xx.100.2.yy private IP

[Fred Dixon]

Hi Amit,

> BigBlueButton Server 2.0.0-beta (1261)

Your running a old version of BigBlueButton.  Recommend you update to the latest build.  You can try out the latest build on 

 https://test.bigbluebutton.org/

Regards,... Fred

  

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[Amit Dhara]

Hi Fred,

I have upgraded to latest version. Now getting the following error after sharing the screen. The message is popping up after 10 to 20 sec of screen sharing. 

Error 1108: ICE connection failed when sharing screen

Thanks

Amit 

[Paulo R. Lanzarin]

Since your server in on AWS, did you setup a STUN
server in Kurento? If not, do as described in http://docs.bigbluebutton.org/html/html5-install.html#2-install-html5-client
and let us know how it goes.

[Amit Dhara]

Hi Paulo,

Our server is not behind NAT so I guess STUN is not needed ... right?

BBB server is in public subnet

Thanks

Amit 

[Paulo R. Lanzarin]

You mentioned

and xx.100.2.yy private IP

If this is the local IP address for the server, you'll need to set up a STUN server.
AFAIK, AWS EC2 instances come behind NAT (with a provided public IP address mapping).
Those need STUN servers; not sure if it's you case, but try it nonetheless. It's easy
and I guess it'll probably solve your issue.

[Amit Dhara]

Before we configure that, can you please give a sample how kurento Url and IP should look like in    /usr/local/bigbluebutton/bbb-webrtc-sfu/config/default.yml

Thanks

Amit 

[Amit Dhara]

Can anybody provide content of default.yml file (/usr/local/bigbluebutton/bbb-webrtc-sfu/config/default.yml) for aws ec2?

[Paulo R. Lanzarin]

Your config seemed right on check. Packaging already provided adequate configuration for that environment. You shouldn't need to change that.

EC2 needs a STUN server. Please try to set it up.

On Sun, Sep 16, 2018, 05:00 Amit Dhara <amit....@gmail.com> wrote:

Can anybody provide content of default.yml file (/usr/local/bigbluebutton/bbb-webrtc-sfu/config/default.yml) for aws ec2?