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3
advanced-features/openvidu-recording/.env Normal file
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SERVER_PORT=6080
LIVEKIT_API_KEY=devkey
LIVEKIT_API_SECRET=secret

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advanced-features/openvidu-recording/.gitignore vendored Normal file
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# Logs
logs
*.log
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yarn-debug.log*
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report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
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advanced-features/openvidu-recording/README.md Normal file
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# OpenVidu Recording
Simple video-call application with recording capabilities. It includes a backend built with Node.js with Express and a frontend built with plain HTML, CSS and JavaScript.
For further information, check the [tutorial documentation](https://livekit-tutorials.openvidu.io/tutorials/advanced-tutorials/node/).
## Prerequisites
- [Node](https://nodejs.org/en/download)
## Run
1. Download repository
```bash
git clone https://github.com/OpenVidu/openvidu-livekit-tutorials.git
cd openvidu-livekit-tutorials/advanced-features/openvidu-recording
```
2. Install dependencies
```bash
npm install
```
3. Run the application
```bash
npm start
```

54
advanced-features/openvidu-recording/index.js Normal file
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import "dotenv/config";
import express from "express";
import cors from "cors";
import path from 'path';
import { fileURLToPath } from 'url';
import { AccessToken, WebhookReceiver } from "livekit-server-sdk";
const SERVER_PORT = process.env.SERVER_PORT || 6080;
const LIVEKIT_API_KEY = process.env.LIVEKIT_API_KEY || "devkey";
const LIVEKIT_API_SECRET = process.env.LIVEKIT_API_SECRET || "secret";
const app = express();
app.use(cors());
app.use(express.json());
app.use(express.raw({ type: "application/webhook+json" }));
// Set the static files location
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
app.use(express.static(__dirname + "/public"));
app.post("/token", async (req, res) => {
const roomName = req.body.roomName;
const participantName = req.body.participantName;
if (!roomName || !participantName) {
res.status(400).json({ errorMessage: "roomName and participantName are required" });
return;
}
const at = new AccessToken(LIVEKIT_API_KEY, LIVEKIT_API_SECRET, {
identity: participantName
});
at.addGrant({ roomJoin: true, room: roomName });
const token = await at.toJwt();
res.json({ token });
});
const webhookReceiver = new WebhookReceiver(LIVEKIT_API_KEY, LIVEKIT_API_SECRET);
app.post("/livekit/webhook", async (req, res) => {
try {
const event = await webhookReceiver.receive(req.body, req.get("Authorization"));
console.log(event);
} catch (error) {
console.error("Error validating webhook event", error);
}
res.status(200).send();
});
app.listen(SERVER_PORT, () => {
console.log("Server started on port:", SERVER_PORT);
});

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advanced-features/openvidu-recording/package-lock.json generated Normal file
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"node": ">= 0.8"
}
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"version": "1.0.1",
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"license": "MIT",
"engines": {
"node": ">= 0.4.0"
}
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"version": "1.1.2",
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"license": "MIT",
"engines": {
"node": ">= 0.8"
}
}
}
}

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{
"name": "openvidu-recording",
"version": "1.0.0",
"description": "Simple video-call application with recording capabilities",
"main": "index.js",
"type": "module",
"scripts": {
"start": "node index.js"
},
"dependencies": {
"cors": "2.8.5",
"dotenv": "16.4.5",
"express": "4.19.2",
"livekit-server-sdk": "2.6.1"
}
}

178
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// When running OpenVidu locally, leave this variable empty
// For other deployment type, configure it with correct URL depending on your deployment
var LIVEKIT_URL = "";
configureLiveKitUrl();
const LivekitClient = window.LivekitClient;
var room;
function configureLiveKitUrl() {
// If LIVEKIT_URL is not configured, use default value from OpenVidu Local deployment
if (!LIVEKIT_URL) {
if (window.location.hostname === "localhost") {
LIVEKIT_URL = "ws://localhost:7880/";
} else {
LIVEKIT_URL = "wss://" + window.location.hostname + ":7443/";
}
}
}
async function joinRoom() {
// Disable 'Join' button
document.getElementById("join-button").disabled = true;
document.getElementById("join-button").innerText = "Joining...";
// Initialize a new Room object
room = new LivekitClient.Room();
// Specify the actions when events take place in the room
// On every new Track received...
room.on(LivekitClient.RoomEvent.TrackSubscribed, (track, _publication, participant) => {
addTrack(track, participant.identity);
});
// On every new Track destroyed...
room.on(LivekitClient.RoomEvent.TrackUnsubscribed, (track, _publication, participant) => {
track.detach();
document.getElementById(track.sid)?.remove();
if (track.kind === "video") {
removeVideoContainer(participant.identity);
}
});
try {
// Get the room name and participant name from the form
const roomName = document.getElementById("room-name").value;
const userName = document.getElementById("participant-name").value;
// Get a token from your application server with the room name and participant name
const token = await getToken(roomName, userName);
// Connect to the room with the LiveKit URL and the token
await room.connect(LIVEKIT_URL, token);
// Hide the 'Join room' page and show the 'Room' page
document.getElementById("room-title").innerText = roomName;
document.getElementById("join").hidden = true;
document.getElementById("room").hidden = false;
// Publish your camera and microphone
await room.localParticipant.enableCameraAndMicrophone();
const localVideoTrack = this.room.localParticipant.videoTrackPublications.values().next().value.track;
addTrack(localVideoTrack, userName, true);
} catch (error) {
console.log("There was an error connecting to the room:", error.message);
await leaveRoom();
}
}
function addTrack(track, participantIdentity, local = false) {
const element = track.attach();
element.id = track.sid;
/* If the track is a video track, we create a container and append the video element to it
with the participant's identity */
if (track.kind === "video") {
const videoContainer = createVideoContainer(participantIdentity, local);
videoContainer.append(element);
appendParticipantData(videoContainer, participantIdentity + (local ? " (You)" : ""));
} else {
document.getElementById("layout-container").append(element);
}
}
async function leaveRoom() {
// Leave the room by calling 'disconnect' method over the Room object
await room.disconnect();
// Remove all HTML elements inside the layout container
removeAllLayoutElements();
// Back to 'Join room' page
document.getElementById("join").hidden = false;
document.getElementById("room").hidden = true;
// Enable 'Join' button
document.getElementById("join-button").disabled = false;
document.getElementById("join-button").innerText = "Join!";
}
window.onbeforeunload = () => {
room?.disconnect();
};
window.onload = generateFormValues;
function generateFormValues() {
document.getElementById("room-name").value = "Test Room";
document.getElementById("participant-name").value = "Participant" + Math.floor(Math.random() * 100);
}
function createVideoContainer(participantIdentity, local = false) {
const videoContainer = document.createElement("div");
videoContainer.id = `camera-${participantIdentity}`;
videoContainer.className = "video-container";
const layoutContainer = document.getElementById("layout-container");
if (local) {
layoutContainer.prepend(videoContainer);
} else {
layoutContainer.append(videoContainer);
}
return videoContainer;
}
function appendParticipantData(videoContainer, participantIdentity) {
const dataElement = document.createElement("div");
dataElement.className = "participant-data";
dataElement.innerHTML = `<p>${participantIdentity}</p>`;
videoContainer.prepend(dataElement);
}
function removeVideoContainer(participantIdentity) {
const videoContainer = document.getElementById(`camera-${participantIdentity}`);
videoContainer?.remove();
}
function removeAllLayoutElements() {
const layoutElements = document.getElementById("layout-container").children;
Array.from(layoutElements).forEach((element) => {
element.remove();
});
}
/**
* --------------------------------------------
* GETTING A TOKEN FROM YOUR APPLICATION SERVER
* --------------------------------------------
* The method below request the creation of a token to
* your application server. This prevents the need to expose
* your LiveKit API key and secret to the client side.
*
* In this sample code, there is no user control at all. Anybody could
* access your application server endpoints. In a real production
* environment, your application server must identify the user to allow
* access to the endpoints.
*/
async function getToken(roomName, participantName) {
const response = await fetch("/token", {
method: "POST",
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify({
roomName,
participantName
})
});
if (!response.ok) {
const error = await response.json();
throw new Error(`Failed to get token: ${error.errorMessage}`);
}
const token = await response.json();
return token.token;
}

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<!DOCTYPE html>
<html lang="en">
<head>
<title>OpenVidu Recording</title>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="shortcut icon" href="images/favicon.ico" type="image/x-icon" />
<!-- Bootstrap -->
<link
href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css"
rel="stylesheet"
integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH"
crossorigin="anonymous"
/>
<script
src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"
integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz"
crossorigin="anonymous"
></script>
<!-- Font Awesome -->
<link
rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css"
integrity="sha512-SnH5WK+bZxgPHs44uWIX+LLJAJ9/2PkPKZ5QiAj6Ta86w+fsb2TkcmfRyVX3pBnMFcV7oQPJkl9QevSCWr3W6A=="
crossorigin="anonymous"
referrerpolicy="no-referrer"
/>
<link rel="stylesheet" href="styles.css" type="text/css" media="screen" />
<script src="https://cdn.jsdelivr.net/npm/livekit-client@2.5.0/dist/livekit-client.umd.js"></script>
<script src="app.js"></script>
</head>
<body>
<header>
<a href="/" title="Home"><h1>OpenVidu Recording</h1></a>
<div id="links">
<a
href="https://github.com/OpenVidu/openvidu-livekit-tutorials/tree/master/advanced-features/openvidu-recording"
title="GitHub Repository"
target="_blank"
>
<i class="fa-brands fa-github"></i>
</a>
<a
href="https://livekit-tutorials.openvidu.io/tutorials/advanced-tutorials/openvidu-recording/"
title="Documentation"
target="_blank"
>
<i class="fa-solid fa-book"></i>
</a>
</div>
</header>
<main>
<div id="join">
<div id="join-dialog">
<h2>Join a Video Room</h2>
<form onsubmit="joinRoom(); return false">
<div>
<label for="participant-name">Participant</label>
<input id="participant-name" class="form-control" type="text" required />
</div>
<div>
<label for="room-name">Room</label>
<input id="room-name" class="form-control" type="text" required />
</div>
<button id="join-button" class="btn btn-lg btn-success" type="submit">Join!</button>
</form>
</div>
</div>
<div id="room" hidden>
<div id="room-header">
<h2 id="room-title"></h2>
<button class="btn btn-danger" id="leave-room-button" onclick="leaveRoom()">Leave Room</button>
</div>
<div id="layout-container"></div>
</div>
</main>
<footer>
<p class="text">Made with love by <span>OpenVidu Team</span></p>
<a href="https://openvidu.io/" target="_blank">
<img id="openvidu-logo" src="images/openvidu_logo.png" alt="OpenVidu logo" />
</a>
</footer>
</body>
</html>

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advanced-features/openvidu-recording/public/styles.css Normal file
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html {
height: 100%;
}
body {
margin: 0;
padding: 0;
padding-top: 50px;
display: flex;
flex-direction: column;
height: 100%;
}
header {
height: 50px;
width: 100%;
position: fixed;
top: 0;
left: 0;
z-index: 1;
display: flex;
justify-content: space-between;
align-items: center;
padding: 10px 30px;
background-color: #4d4d4d;
}
header h1 {
margin: 0;
font-size: 1.5em;
font-weight: bold;
}
header a {
color: #ccc;
text-decoration: none;
}
header a:hover {
color: #a9a9a9;
}
header i {
padding: 5px 5px;
font-size: 2em;
}
main {
flex: 1;
padding: 20px;
}
#join {
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
height: 100%;
}
#join-dialog {
width: 70%;
max-width: 900px;
padding: 60px;
border-radius: 6px;
background-color: #f0f0f0;
}
#join-dialog h2 {
color: #4d4d4d;
font-size: 60px;
font-weight: bold;
text-align: center;
}
#join-dialog form {
text-align: left;
}
#join-dialog label {
display: block;
margin-bottom: 10px;
color: #0088aa;
font-weight: bold;
font-size: 20px;
}
.form-control {
width: 100%;
padding: 8px;
margin-bottom: 10px;
box-sizing: border-box;
color: #0088aa;
font-weight: bold;
}
.form-control:focus {
color: #0088aa;
border-color: #0088aa;
-webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(0, 136, 170, 0.6);
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(0, 136, 170, 0.6);
}
#join-dialog button {
display: block;
margin: 20px auto 0;
}
.btn {
font-weight: bold;
}
.btn-success {
background-color: #06d362;
border-color: #06d362;
}
.btn-success:hover {
background-color: #1abd61;
border-color: #1abd61;
}
#room {
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
#room-header {
display: flex;
justify-content: space-between;
align-items: center;
width: 100%;
max-width: 1000px;
padding: 0 20px;
margin-bottom: 20px;
}
#room-title {
font-size: 2em;
font-weight: bold;
margin: 0;
}
#layout-container {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
gap: 10px;
justify-content: center;
align-items: center;
width: 100%;
max-width: 1000px;
height: 100%;
}
.video-container {
position: relative;
background: #3b3b3b;
aspect-ratio: 16/9;
border-radius: 6px;
overflow: hidden;
}
.video-container video {
width: 100%;
height: 100%;
}
.video-container .participant-data {
position: absolute;
top: 0;
left: 0;
}
.participant-data p {
background: #f8f8f8;
margin: 0;
padding: 0 5px;
color: #777777;
font-weight: bold;
border-bottom-right-radius: 4px;
}
footer {
height: 60px;
width: 100%;
padding: 10px 30px;
display: flex;
justify-content: space-between;
align-items: center;
background-color: #4d4d4d;
}
footer a {
color: #ffffff;
text-decoration: none;
}
footer .text {
color: #ccc;
margin: 0;
}
footer .text span {
color: white;
font-weight: bold;
}
#openvidu-logo {
height: 35px;
-webkit-transition: all 0.1s ease-in-out;
-moz-transition: all 0.1s ease-in-out;
-o-transition: all 0.1s ease-in-out;
transition: all 0.1s ease-in-out;
}
#openvidu-logo:hover {
-webkit-filter: grayscale(0.5);
filter: grayscale(0.5);
}
/* Media Queries */
@media screen and (max-width: 768px) {
header {
padding: 10px 15px;
}
#join-dialog {
width: 90%;
padding: 30px;
}
#join-dialog h2 {
font-size: 50px;
}
#layout-container {
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}
footer {
padding: 10px 15px;
}
}
@media screen and (max-width: 480px) {
header {
padding: 10px;
}
#join-dialog {
width: 100%;
padding: 20px;
}
#join-dialog h2 {
font-size: 40px;
}
#layout-container {
grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}
.video-container {
aspect-ratio: 9/16;
}
footer {
padding: 10px;
}
}