Build video calling, audio calling, messaging, and screen sharing applications powered by the Amazon Chime SDK

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Installation

npm install amazon-chime-sdk-js --save

Setup

Meeting session

import{ConsoleLogger,DefaultDeviceController,DefaultMeetingSession,LogLevel,MeetingSessionConfiguration}from'amazon-chime-sdk-js';constlogger=newConsoleLogger('MyLogger',LogLevel.INFO);constdeviceController=newDefaultDeviceController(logger);// You need responses from server-side Chime API. See below for details.constmeetingResponse=/* The response from the CreateMeeting API action */;constattendeeResponse=/* The response from the CreateAttendee or BatchCreateAttendee API action */;constconfiguration=newMeetingSessionConfiguration(meetingResponse,attendeeResponse);// In the usage examples below, you will use this meetingSession object.constmeetingSession=newDefaultMeetingSession(configuration,logger,deviceController);

Getting responses from your server application

constAWS=require('aws-sdk');const{v4:uuid}=require('uuid');// You must use "us-east-1" as the region for Chime API and set the endpoint.constchime=newAWS.ChimeSDKMeetings({region:'us-east-1'});constmeetingResponse=awaitchime.createMeeting({ClientRequestToken:uuid(),MediaRegion:'us-west-2',// Specify the region in which to create the meeting.}).promise();constattendeeResponse=awaitchime.createAttendee({MeetingId:meetingResponse.Meeting.MeetingId,ExternalUserId:uuid(),// Link the attendee to an identity managed by your application.}).promise();

Messaging session

import{ChimeSDKMessagingClient}from'@aws-sdk/client-chime-sdk-messaging';import{ConsoleLogger,DefaultMessagingSession,LogLevel,MessagingSessionConfiguration,}from'amazon-chime-sdk-js';constlogger=newConsoleLogger('SDK',LogLevel.INFO);// You will need AWS credentials configured before calling AWS or Amazon Chime APIs.constchime=newChimeSDKMessagingClient({region:'us-east-1'});constuserArn=/* The userArn */;constsessionId=/* The sessionId */;constconfiguration=newMessagingSessionConfiguration(userArn,sessionId,undefined,chime);constmessagingSession=newDefaultMessagingSession(configuration,logger);

configuration.prefetchOn=Prefetch.Connect;configuration.prefetchSortBy=PrefetchSortBy.Unread;

Building and testing

git fetch --tags https://github.com/aws/amazon-chime-sdk-jsnpm run buildnpm run test

Generating the documentation

npm run buildnpm run doc

Reporting a suspected vulnerability

Usage

Device

constaudioInputDevices=awaitmeetingSession.audioVideo.listAudioInputDevices();constaudioOutputDevices=awaitmeetingSession.audioVideo.listAudioOutputDevices();constvideoInputDevices=awaitmeetingSession.audioVideo.listVideoInputDevices();// An array of MediaDeviceInfo objectsaudioInputDevices.forEach(mediaDeviceInfo=>{console.log(`Device ID:${mediaDeviceInfo.deviceId} Microphone:${mediaDeviceInfo.label}`);});

constaudioInputDeviceInfo=/* An array item from meetingSession.audioVideo.listAudioInputDevices */;awaitmeetingSession.audioVideo.startAudioInput(audioInputDeviceInfo.deviceId);constaudioOutputDeviceInfo=/* An array item from meetingSession.audioVideo.listAudioOutputDevices */;awaitmeetingSession.audioVideo.chooseAudioOutput(audioOutputDeviceInfo.deviceId);

constvideoInputDeviceInfo=/* An array item from meetingSession.audioVideo.listVideoInputDevices */;awaitmeetingSession.audioVideo.startVideoInput(videoInputDeviceInfo.deviceId);// Stop video input. If the previously chosen camera has an LED light on,// it will turn off indicating the camera is no longer capturing.awaitmeetingSession.audioVideo.stopVideoInput();

constobserver={audioInputsChanged:freshAudioInputDeviceList=>{// An array of MediaDeviceInfo objectsfreshAudioInputDeviceList.forEach(mediaDeviceInfo=>{console.log(`Device ID:${mediaDeviceInfo.deviceId} Microphone:${mediaDeviceInfo.label}`);});},audioOutputsChanged:freshAudioOutputDeviceList=>{console.log('Audio outputs updated: ',freshAudioOutputDeviceList);},videoInputsChanged:freshVideoInputDeviceList=>{console.log('Video inputs updated: ',freshVideoInputDeviceList);},audioInputMuteStateChanged:(device,muted)=>{console.log('Device',device,muted ?'is muted in hardware' :'is not muted');},};meetingSession.audioVideo.addDeviceChangeObserver(observer);

Starting a session

constaudioElement=/* HTMLAudioElement object e.g. document.getElementById('audio-element-id') */;meetingSession.audioVideo.bindAudioElement(audioElement);constobserver={audioVideoDidStart:()=>{console.log('Started');}};meetingSession.audioVideo.addObserver(observer);meetingSession.audioVideo.start();

constobserver={audioVideoDidStart:()=>{console.log('Started');},audioVideoDidStop:sessionStatus=>{// See the "Stopping a session" section for details.console.log('Stopped with a session status code: ',sessionStatus.statusCode());},audioVideoDidStartConnecting:reconnecting=>{if(reconnecting){// e.g. the WiFi connection is dropped.console.log('Attempting to reconnect');}},};meetingSession.audioVideo.addObserver(observer);

Audio

// MutemeetingSession.audioVideo.realtimeMuteLocalAudio();// Unmuteconstunmuted=meetingSession.audioVideo.realtimeUnmuteLocalAudio();if(unmuted){console.log('Other attendees can hear your audio');}else{// See the realtimeSetCanUnmuteLocalAudio use case below.console.log('You cannot unmute yourself');}

constmuted=meetingSession.audioVideo.realtimeIsLocalAudioMuted();if(muted){console.log('You are muted');}else{console.log('Other attendees can hear your audio');}

meetingSession.audioVideo.realtimeSetCanUnmuteLocalAudio(false);// Optional: Force mute.meetingSession.audioVideo.realtimeMuteLocalAudio();constunmuted=meetingSession.audioVideo.realtimeUnmuteLocalAudio();console.log(`${unmuted} is false. You cannot unmute yourself`);

import{DefaultModality}from'amazon-chime-sdk-js';// This is your attendee ID. You can also subscribe to another attendee's ID.// See the "Attendees" section for an example on how to retrieve other attendee IDs// in a session.constpresentAttendeeId=meetingSession.configuration.credentials.attendeeId;meetingSession.audioVideo.realtimeSubscribeToVolumeIndicator(presentAttendeeId,(attendeeId,volume,muted,signalStrength)=>{constbaseAttendeeId=newDefaultModality(attendeeId).base();if(baseAttendeeId!==attendeeId){// See the "Screen and content share" section for details.console.log(`The volume of${baseAttendeeId}'s content changes`);}// A null value for any field means that it has not changed.console.log(`${attendeeId}'s volume data: `,{      volume,// a fraction between 0 and 1      muted,// a boolean      signalStrength,// 0 (no signal), 0.5 (weak), 1 (strong)});});

// This is your attendee ID. You can also subscribe to another attendee's ID.// See the "Attendees" section for an example on how to retrieve other attendee IDs// in a session.constpresentAttendeeId=meetingSession.configuration.credentials.attendeeId;// To track mute changesmeetingSession.audioVideo.realtimeSubscribeToVolumeIndicator(presentAttendeeId,(attendeeId,volume,muted,signalStrength)=>{// A null value for volume, muted and signalStrength field means that it has not changed.if(muted===null){// muted state has not changed, ignore volume and signalStrength changesreturn;}// mute state changedconsole.log(`${attendeeId}'s mute state changed: `,{      muted,// a boolean});});// To track signal strength changesmeetingSession.audioVideo.realtimeSubscribeToVolumeIndicator(presentAttendeeId,(attendeeId,volume,muted,signalStrength)=>{// A null value for volume, muted and signalStrength field means that it has not changed.if(signalStrength===null){// signalStrength has not changed, ignore volume and muted changesreturn;}// signal strength changedconsole.log(`${attendeeId}'s signal strength changed: `,{      signalStrength,// 0 (no signal), 0.5 (weak), 1 (strong)});});

import{DefaultActiveSpeakerPolicy}from'amazon-chime-sdk-js';constactiveSpeakerCallback=attendeeIds=>{if(attendeeIds.length){console.log(`${attendeeIds[0]} is the most active speaker`);}};meetingSession.audioVideo.subscribeToActiveSpeakerDetector(newDefaultActiveSpeakerPolicy(),activeSpeakerCallback);

Video

constvideoElement=/* HTMLVideoElement object e.g. document.getElementById('video-element-id') */;// Make sure you have chosen your camera. In this use case, you will choose the first device.constvideoInputDevices=awaitmeetingSession.audioVideo.listVideoInputDevices();// The camera LED light will turn on indicating that it is now capturing.// See the "Device" section for details.awaitmeetingSession.audioVideo.startVideoInput(videoInputDevices[0].deviceId);constobserver={// videoTileDidUpdate is called whenever a new tile is created or tileState changes.videoTileDidUpdate:tileState=>{// Ignore a tile without attendee ID and other attendee's tile.if(!tileState.boundAttendeeId||!tileState.localTile){return;}meetingSession.audioVideo.bindVideoElement(tileState.tileId,videoElement);}};meetingSession.audioVideo.addObserver(observer);meetingSession.audioVideo.startLocalVideoTile();

constvideoElement=/* HTMLVideoElement object e.g. document.getElementById('video-element-id') */;letlocalTileId=null;constobserver={videoTileDidUpdate:tileState=>{// Ignore a tile without attendee ID and other attendee's tile.if(!tileState.boundAttendeeId||!tileState.localTile){return;}// videoTileDidUpdate is also invoked when you call startLocalVideoTile or tileState changes.// The tileState.active can be false in poor Internet connection, when the user paused the video tile, or when the video tile first arrived.console.log(`If you called stopLocalVideoTile,${tileState.active} is false.`);meetingSession.audioVideo.bindVideoElement(tileState.tileId,videoElement);localTileId=tileState.tileId;},videoTileWasRemoved:tileId=>{if(localTileId===tileId){console.log(`You called removeLocalVideoTile. videoElement can be bound to another tile.`);localTileId=null;}}};meetingSession.audioVideo.addObserver(observer);meetingSession.audioVideo.stopLocalVideoTile();// Stop video input. If the previously chosen camera has an LED light on,// it will turn off indicating the camera is no longer capturing.awaitmeetingSession.audioVideo.stopVideoInput();// Optional: You can remove the local tile from the session.meetingSession.audioVideo.removeLocalVideoTile();

constvideoElement=/* HTMLVideoElement object e.g. document.getElementById('video-element-id') */;constobserver={// videoTileDidUpdate is called whenever a new tile is created or tileState changes.videoTileDidUpdate:tileState=>{// Ignore a tile without attendee ID, a local tile (your video), and a content share.if(!tileState.boundAttendeeId||tileState.localTile||tileState.isContent){return;}meetingSession.audioVideo.bindVideoElement(tileState.tileId,videoElement);}};meetingSession.audioVideo.addObserver(observer);

/*  No one is sharing video                    e.g. 9 attendee videos (9 empty cells)  Next available:                            Next available:  videoElements[0]                           videoElements[7]  ╔════╦════╦════╦════╦════╗                 ╔════╦════╦════╦════╦════╗  ║  0 ║  1 ║  2 ║  3 ║  4 ║                 ║    ║    ║    ║    ║    ║  ╠════╬════╬════╬════╬════╣                 ╠════╬════╬════╬════╬════╣  ║  5 ║  6 ║  7 ║  8 ║  9 ║                 ║    ║    ║  7 ║  8 ║    ║  ╠════╬════╬════╬════╬════╣                 ╠════╬════╬════╬════╬════╣  ║ 10 ║ 11 ║ 12 ║ 13 ║ 14 ║                 ║ 10 ║    ║ 12 ║ 13 ║ 14 ║  ╠════╬════╬════╬════╬════╣                 ╠════╬════╬════╬════╬════╣  ║ 15 ║ 16 ║ 17 ║ 18 ║ 19 ║                 ║ 15 ║ 16 ║ 17 ║ 18 ║ 19 ║  ╠════╬════╬════╬════╬════╣                 ╠════╬════╬════╬════╬════╣  ║ 20 ║ 21 ║ 22 ║ 23 ║ 24 ║                 ║ 20 ║ 21 ║ 22 ║ 23 ║ 24 ║  ╚════╩════╩════╩════╩════╝                 ╚════╩════╩════╩════╩════╝ */constvideoElements=[/* an array of 25 HTMLVideoElement objects in your application */];// index-tileId pairsconstindexMap={};constacquireVideoElement=tileId=>{// Return the same video element if already bound.for(leti=0;i<25;i+=1){if(indexMap[i]===tileId){returnvideoElements[i];}}// Return the next available video element.for(leti=0;i<25;i+=1){if(!indexMap.hasOwnProperty(i)){indexMap[i]=tileId;returnvideoElements[i];}}thrownewError('no video element is available');};constreleaseVideoElement=tileId=>{for(leti=0;i<25;i+=1){if(indexMap[i]===tileId){deleteindexMap[i];return;}}};constobserver={// videoTileDidUpdate is called whenever a new tile is created or tileState changes.videoTileDidUpdate:tileState=>{// Ignore a tile without attendee ID, a local tile (your video), and a content share.if(!tileState.boundAttendeeId||tileState.localTile||tileState.isContent){return;}meetingSession.audioVideo.bindVideoElement(tileState.tileId,acquireVideoElement(tileState.tileId));},videoTileWasRemoved:tileId=>{releaseVideoElement(tileId);},};meetingSession.audioVideo.addObserver(observer);

constobserver={remoteVideoSourcesDidChange:videoSources=>{videoSources.forEach(videoSource=>{const{ attendee}=videoSource;console.log(`An attendee (${attendee.attendeeId}${attendee.externalUserId}) is sending video`);});},};meetingSession.audioVideo.addObserver(observer);

constvideoSources=meetingSession.audioVideo.getRemoteVideoSources();videoSources.forEach(videoSource=>{const{ attendee}=videoSource;console.log(`An attendee (${attendee.attendeeId}${attendee.externalUserId}) is sending video`);});

Screen and content share

import{DefaultModality}from'amazon-chime-sdk-js';constobserver={videoTileDidUpdate:tileState=>{// Ignore a tile without attendee ID and videos.if(!tileState.boundAttendeeId||!tileState.isContent){return;}constyourAttendeeId=meetingSession.configuration.credentials.attendeeId;// tileState.boundAttendeeId is formatted as "attendee-id#content".constboundAttendeeId=tileState.boundAttendeeId;// Get the attendee ID from "attendee-id#content".constbaseAttendeeId=newDefaultModality(boundAttendeeId).base();if(baseAttendeeId===yourAttendeeId){console.log('You called startContentShareFromScreenCapture');}},contentShareDidStart:()=>{console.log('Screen share started');},contentShareDidStop:()=>{// Chime SDK allows 2 simultaneous content shares per meeting.// This method will be invoked if two attendees are already sharing content// when you call startContentShareFromScreenCapture or startContentShare.console.log('Screen share stopped');},};meetingSession.audioVideo.addContentShareObserver(observer);meetingSession.audioVideo.addObserver(observer);// A browser will prompt the user to choose the screen.constcontentShareStream=awaitmeetingSession.audioVideo.startContentShareFromScreenCapture();

DefaultVideoTile.connectVideoStreamToVideoElement(contentShareStream,videoElement,false);

constsourceId=/* Window or screen ID e.g. the ID of a DesktopCapturerSource object in Electron */;awaitmeetingSession.audioVideo.startContentShareFromScreenCapture(sourceId);

constvideoElement=/* HTMLVideoElement object e.g. document.getElementById('video-element-id') */;constinputElement=/* HTMLInputElement object e.g. document.getElementById('input-element-id') */;inputElement.addEventListener('change',async()=>{constfile=inputElement.files[0];consturl=URL.createObjectURL(file);videoElement.src=url;awaitvideoElement.play();constmediaStream=videoElement.captureStream();/* use mozCaptureStream for Firefox e.g. videoElement.mozCaptureStream(); */awaitmeetingSession.audioVideo.startContentShare(mediaStream);inputElement.value='';});

constobserver={contentShareDidStop:()=>{console.log('Content share stopped');},};meetingSession.audioVideo.addContentShareObserver(observer);awaitmeetingSession.audioVideo.stopContentShare();

import{DefaultModality}from'amazon-chime-sdk-js';constvideoElementStack=[/* an array of 2 HTMLVideoElement objects in your application */];// tileId-videoElement mapconsttileMap={};constobserver={videoTileDidUpdate:tileState=>{// Ignore a tile without attendee ID and videos.if(!tileState.boundAttendeeId||!tileState.isContent){return;}constyourAttendeeId=meetingSession.configuration.credentials.attendeeId;// tileState.boundAttendeeId is formatted as "attendee-id#content".constboundAttendeeId=tileState.boundAttendeeId;// Get the attendee ID from "attendee-id#content".constbaseAttendeeId=newDefaultModality(boundAttendeeId).base();if(baseAttendeeId!==yourAttendeeId){console.log(`${baseAttendeeId} is sharing screen now`);// Get the already bound video element if available, or use an unbound element.constvideoElement=tileMap[tileState.tileId]||videoElementStack.pop();if(videoElement){tileMap[tileState.tileId]=videoElement;meetingSession.audioVideo.bindVideoElement(tileState.tileId,videoElement);}else{console.log('No video element is available');}}},videoTileWasRemoved:tileId=>{// Release the unused video element.constvideoElement=tileMap[tileId];if(videoElement){videoElementStack.push(videoElement);deletetileMap[tileId];}},};meetingSession.audioVideo.addObserver(observer);

Attendees

constattendeePresenceSet=newSet();constcallback=(presentAttendeeId,present)=>{console.log(`Attendee ID:${presentAttendeeId} Present:${present}`);if(present){attendeePresenceSet.add(presentAttendeeId);}else{attendeePresenceSet.delete(presentAttendeeId);}};meetingSession.audioVideo.realtimeSubscribeToAttendeeIdPresence(callback);

import{DefaultModality}from'amazon-chime-sdk-js';constroster={};meetingSession.audioVideo.realtimeSubscribeToAttendeeIdPresence((presentAttendeeId,present)=>{if(!present){deleteroster[presentAttendeeId];return;}meetingSession.audioVideo.realtimeSubscribeToVolumeIndicator(presentAttendeeId,(attendeeId,volume,muted,signalStrength)=>{constbaseAttendeeId=newDefaultModality(attendeeId).base();if(baseAttendeeId!==attendeeId){// Optional: Do not include the content attendee (attendee-id#content) in the roster.// See the "Screen and content share" section for details.return;}if(roster.hasOwnProperty(attendeeId)){// A null value for any field means that it has not changed.roster[attendeeId].volume=volume;// a fraction between 0 and 1roster[attendeeId].muted=muted;// A booleanroster[attendeeId].signalStrength=signalStrength;// 0 (no signal), 0.5 (weak), 1 (strong)}else{// Add an attendee.// Optional: You can fetch more data, such as attendee name,// from your server application and set them here.roster[attendeeId]={          attendeeId,          volume,          muted,          signalStrength,};}});});

Monitoring and alerts

constobserver={metricsDidReceive:clientMetricReport=>{constmetricReport=clientMetricReport.getObservableMetrics();const{      videoPacketSentPerSecond,      videoUpstreamBitrate,      availableOutgoingBitrate,      availableIncomingBitrate,      audioSpeakerDelayMs,}=metricReport;console.log(`Sending video bitrate in kilobits per second:${videoUpstreamBitrate/1000} and sending packets per second:${videoPacketSentPerSecond}`);console.log(`Sending bandwidth is${availableOutgoingBitrate/1000}, and receiving bandwidth is${availableIncomingBitrate/1000}`);console.log(`Audio speaker delay is${audioSpeakerDelayMs}`);},};meetingSession.audioVideo.addObserver(observer);

constobserver={connectionDidBecomePoor:()=>{console.log('Your connection is poor');},connectionDidSuggestStopVideo:()=>{console.log('Recommend turning off your video');},videoSendDidBecomeUnavailable:()=>{// Chime SDK allows a total of 25 simultaneous videos per meeting.// If you try to share more video, this method will be called.// See videoAvailabilityDidChange below to find out when it becomes available.console.log('You cannot share your video');},videoAvailabilityDidChange:videoAvailability=>{// canStartLocalVideo will also be true if you are already sharing your video.if(videoAvailability.canStartLocalVideo){console.log('You can share your video');}else{console.log('You cannot share your video');}},};meetingSession.audioVideo.addObserver(observer);

Stopping a session

import{MeetingSessionStatusCode}from'amazon-chime-sdk-js';constobserver={audioVideoDidStop:sessionStatus=>{constsessionStatusCode=sessionStatus.statusCode();if(sessionStatusCode===MeetingSessionStatusCode.Left){/*       * You called meetingSession.audioVideo.stop().       */console.log('You left the session');}else{console.log('Stopped with a session status code: ',sessionStatusCode);}},};meetingSession.audioVideo.addObserver(observer);meetingSession.audioVideo.stop();

import{MeetingSessionStatusCode}from'amazon-chime-sdk-js';constobserver={audioVideoDidStop:sessionStatus=>{constsessionStatusCode=sessionStatus.statusCode();if(sessionStatusCode===MeetingSessionStatusCode.MeetingEnded){/*        - You (or someone else) have called the DeleteMeeting API action in your server application.        - You attempted to join a deleted meeting.        - No audio connections are present in the meeting for more than five minutes.        - The meeting time exceeds 24 hours.        See https://docs.aws.amazon.com/chime-sdk/latest/dg/mtgs-sdk-mtgs.html for details.      */console.log('The session has ended');}else{console.log('Stopped with a session status code: ',sessionStatusCode);}},};meetingSession.audioVideo.addObserver(observer);

Meeting readiness checker

import{DefaultMeetingReadinessChecker}from'amazon-chime-sdk-js';// In the usage examples below, you will use this meetingReadinessChecker object.constmeetingReadinessChecker=newDefaultMeetingReadinessChecker(logger,meetingSession);

import{CheckAudioInputFeedback}from'amazon-chime-sdk-js';constaudioInputDeviceInfo=/* An array item from meetingSession.audioVideo.listAudioInputDevices */;constaudioInputFeedback=awaitmeetingReadinessChecker.checkAudioInput(audioInputDeviceInfo.deviceId);switch(audioInputFeedback){caseCheckAudioInputFeedback.Succeeded:console.log('Succeeded');break;caseCheckAudioInputFeedback.Failed:console.log('Failed');break;caseCheckAudioInputFeedback.PermissionDenied:console.log('Permission denied');break;}

import{CheckAudioConnectivityFeedback,CheckContentShareConnectivityFeedback,CheckVideoConnectivityFeedback}from'amazon-chime-sdk-js';// Tests audio connectionconstaudioDeviceInfo=/* An array item from meetingSession.audioVideo.listAudioInputDevices */;constaudioFeedback=awaitmeetingReadinessChecker.checkAudioConnectivity(audioDeviceInfo.deviceId);console.log(`Feedback result:${CheckAudioConnectivityFeedback[audioFeedback]}`);// Test video connectionconstvideoInputInfo=/* An array item from meetingSession.audioVideo.listVideoInputDevices */;constvideoFeedback=awaitmeetingReadinessChecker.checkVideoConnectivity(videoInputInfo.deviceId);console.log(`Feedback result:${CheckVideoConnectivityFeedback[videoFeedback]}`);// Tests content share connectivityconstcontentShareFeedback=awaitmeetingReadinessChecker.checkContentShareConnectivity();console.log(`Feedback result:${CheckContentShareConnectivityFeedback[contentShareFeedback]}`);

import{CheckNetworkUDPConnectivityFeedback,CheckNetworkTCPConnectivityFeedback,}from'amazon-chime-sdk-js';// Tests for UDP network connectivityconstnetworkUDPFeedback=awaitmeetingReadinessChecker.checkNetworkUDPConnectivity();console.log(`Feedback result:${CheckNetworkUDPConnectivityFeedback[networkUDPFeedback]}`);// Tests for TCP network connectivityconstnetworkTCPFeedback=awaitmeetingReadinessChecker.checkNetworkTCPConnectivity();console.log(`Feedback result:${CheckNetworkTCPConnectivityFeedback[networkTCPFeedback]}`);

Selecting an audio profile

meetingSession.audioVideo.setAudioProfile(AudioProfile.fullbandSpeechMono());

meetingSession.audioVideo.setContentAudioProfile(AudioProfile.fullbandMusicMono());

meetingSession.audioVideo.setAudioProfile(AudioProfile.fullbandMusicStereo());

meetingSession.audioVideo.setContentAudioProfile(AudioProfile.fullbandMusicStereo());

meetingSession.audioVideo.setAudioProfile(newAudioProfile(null,false));

meetingSession.audioVideo.setAudioProfile(AudioProfile.fullbandSpeechMono(false));

meetingSession.audioVideo.setContentAudioProfile(newAudioProfile(null,false));

meetingSession.audioVideo.setContentAudioProfile(AudioProfile.fullbandSpeechMono(false));

Starting a messaging session

constobserver={messagingSessionDidStart:()=>{console.log('Session started');},messagingSessionDidStartConnecting:reconnecting=>{if(reconnecting){console.log('Start reconnecting');}else{console.log('Start connecting');}},messagingSessionDidStop:event=>{console.log(`Closed:${event.code}${event.reason}`);},messagingSessionDidReceiveMessage:message=>{console.log(`Receive message type${message.type}`);},};messagingSession.addObserver(observer);awaitmessagingSession.start();

Providing application metadata

import{MeetingSessionConfiguration,ApplicationMetadata}from'amazon-chime-sdk-js';constcreateMeetingResponse=// CreateMeeting API response.constcreateAttendeeResponse=// CreateAttendee API response.constmeetingSessionConfiguration=newMeetingSessionConfiguration(createMeetingResponse,createAttendeeResponse);meetingSessionConfiguration.applicationMetadata=ApplicationMetadata.create({appName:'AppName',appVersion:'1.0.0'});

Accepted application metadata constraints

// The appName must be between 1-32 characters.// The appName must satisfy following regular expression:// /^[a-zA-Z0-9]+[a-zA-Z0-9_-]*[a-zA-Z0-9]+$/gappName:string;// The appVersion must be between 1-32 characters.// The appVersion must follow the Semantic Versioning format.// https://semver.org/appVersion:string;

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