4.0 conference sample mixstream no sound

[liu__bin]

Hi,intel team

When we tested the video conference demo of the conference sample with the chrome browser,

we tested MAC, Android and Windows7, all with video but no sound.

The verified chrome version is as follows

chrome：66.0.3359.181  (OS X EI Capitian 10.11(15284)
chrome： 66.0.3359.181 （64 ）win7
chrome: 65.0.3325.109 （android7.1.1;OPPO R11 Build/NMF26X  ）

1. https://xxx.com/rooms/5b18cbb7d287c4617b095f9e/streams/904673555285484800
   '[{"op":"add","path":"/info/inViews","value":"common"}]' 

   response ：audio codec: opus, video codec: vp8

2.Try to modify extras/basic_example/public/scripts/index.js
  set subscribe  audio codec to aac, 

   then refresh Browser re-enter the room, but still no sound!   audio codec is opus.

    deom code below

            for (const stream of streams) {
                    if(!subscribeForward){
                      if (stream.source.audio === 'mixed' || stream.source.video ===
                        'mixed') {
                        console.log("subscribeforward mixed debug");
                        conference.subscribe(stream, {
                            audio: {codec:'aac'},
                            video: true
                        }).then((subscription) => {
                            subscriptionForMixedStream = subscription;
                            $('.remote video').get(0).srcObject = stream.mediaStream;
                            subscription.addEventListener('error', (err) => {
                                console.log('Subscription error: ' + err.error.message);
                            })
                        });

3. The Server-side MCU related information

     OS:CentOS Linux release 7.2.1511 (Core)

     MCU: CS_WebRTC_Conference_Server_MCU.v4.0.tgz

     audio_agent : libfdk-aac.so   has been installed

     Management Console's roomid: 5b18cbb7d287c4617b095f9e configure file refer to the attachment

Could you give me some tips?

Looking forward to your reply. Thank you !

[Qiujiao_W_Intel]

Hi, aac codec currently is not supported in webrtc transportation, it can be used in scenarios other than webrtc transportation like rtmp and recording. Please use other audio codec (opus, pcmu,  .etc) for webrtc transportation.

[Daghe]

设置为opus时混合流依旧没有声音，请求如何修改配置@liu, bin，@Qiujiao W. (Intel)

[Naresh_R_1]

Hi Daghe,

Change basic example as below audio works, basic example us muted by default for mixed stream.

<div id="resolutions"><span>Try a different resolution:&nbsp;</span></div>
    <div class="remote">
      <video playsinline autoplay></video>

Thanks

Naresh