livekit-rtc

📹🎙️Node.js realtime SDK for LiveKit

Use this SDK to add realtime video, audio and data features to your Node app. By connecting to a self- or cloud-hosted LiveKit server, you can quickly build applications like interactive live streaming or video calls with just a few lines of code.

This SDK is currently in Developer Preview mode and not ready for production use. There will be bugs and APIs may change during this period.

We welcome and appreciate any feedback or contributions. You can create issues here or chat live with us in the #dev channel within the LiveKit Community Slack.

Using realtime SDK

Connecting to a room

import {
  RemoteParticipant,
  RemoteTrack,
  RemoteTrackPublication,
  Room,
  RoomEvent,
  dispose,
} from '@livekit/rtc-node';

const room = new Room();
await room.connect(url, token, { autoSubscribe: true, dynacast: true });
console.log('connected to room', room);

// add event listeners
room
  .on(RoomEvent.TrackSubscribed, handleTrackSubscribed)
  .on(RoomEvent.Disconnected, handleDisconnected)
  .on(RoomEvent.LocalTrackPublished, handleLocalTrackPublished);

process.on('SIGINT', () => {
  await room.disconnect();
  await dispose();
});

Publishing a track

import {
  AudioFrame,
  AudioSource,
  LocalAudioTrack,
  TrackPublishOptions,
  TrackSource,
} from '@livekit/rtc-node';
import { readFileSync } from 'node:fs';

// set up audio track
const source = new AudioSource(16000, 1);
const track = LocalAudioTrack.createAudioTrack('audio', source);
const options = new TrackPublishOptions();
options.source = TrackSource.SOURCE_MICROPHONE;

// note: if converting from Uint8Array to Int16Array, *do not* use buffer.slice!
// it is marked unstable by Node and can cause undefined behaviour, such as massive chunks of
// noise being added to the end.
// it is recommended to use buffer.subarray instead.
const sample = readFileSync(pathToFile);
var buffer = new Int16Array(sample.buffer);

await room.localParticipant.publishTrack(track, options);
await source.captureFrame(new AudioFrame(buffer, 16000, 1, buffer.byteLength / 2));

Examples

• publish-wav: connect to a room and publish a wave file

Getting help / Contributing

Please join us on Slack to get help from our devs/community. We welcome your contributions and details can be discussed there.