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Configuring Audio, Video Input and Output devices

In this guide we'll show you how to configure audio and video input and output devices in your Twilio Video Rooms application.

Selecting a Specific Video Input

You can use navigator.mediaDevices.enumerateDevices() to select a specific video input like this:

1const { connect, createLocalTracks } = require('twilio-video');
2
3navigator.mediaDevices.enumerateDevices().then(devices => {
4  const videoInput = devices.find(device => device.kind === 'videoinput');
5  return createLocalTracks({ audio: true, video: { deviceId: videoInput.deviceId } });
6}).then(localTracks => {
7  return connect('my-token', { name: 'my-room-name', tracks: localTracks });
8}).then(room => {
9  console.log('Connected to room ' + room.name);
10});

Audio inputs can also be selected in a similar fashion.

Selecting a Specific Audio Input

Selecting a specific audio input is the same as selecting a specific video input. Just select the audio input device ID and set it on the constraints:

1const { connect, createLocalTracks } = require('twilio-video');
2
3navigator.mediaDevices.enumerateDevices().then(devices => {
4  const audioInput = devices.find(device => device.kind === 'audioinput');
5  return createLocalTracks({ audio: { deviceId: audioInput.deviceId }, video: true });
6}).then(localTracks => {
7  return connect('my-token', { name: 'my-room-name', tracks: localTracks });
8}).then(room => {
9  console.log('Connected to room ' + room.name);
10});

Selecting a Specific Audio Output

You can use navigator.mediaDevices.enumerateDevices() along with HTMLMediaElement.setSinkId() to set the audio output device like this:

1const { connect } = require('twilio-video');
2
3let audioOutputDevice;
4
5navigator.mediaDevices.enumerateDevices().then(devices => {
6  audioOutputDevice = devices.find(device => device.kind === 'audiooutput');
7  return connect('$TOKEN', { name: 'my-room-name' });
8}).then(room => {
9  room.on('trackSubscribed', track => {
10    if (track.kind === 'audio') {
11      const audioElement = track.attach();
12      audioElement.setSinkId(audioOutputDevice.deviceId).then(() => {
13        document.body.appendChild(audioElement);
14      });
15    }
16  });
17});