openvidu-live-captions: remove bug with participantInfo on transcriptions

advanced-features/openvidu-recording-advanced-node-azure/.env

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+SERVER_PORT=6080
+
+# LiveKit configuration
+LIVEKIT_URL=http://localhost:7880
+LIVEKIT_API_KEY=devkey
+LIVEKIT_API_SECRET=secret
+
+# Recording configuration
+RECORDINGS_PATH=recordings/
+RECORDING_PLAYBACK_STRATEGY=AZURE
+
+# Azure Blob Storage configuration
+AZURE_ACCOUNT_NAME=your_account_name
+AZURE_ACCOUNT_KEY=your_account_key
+AZURE_CONTAINER_NAME=openvidu-appdata

advanced-features/openvidu-recording-advanced-node-azure/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

advanced-features/openvidu-recording-advanced-node-azure/README.md

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+# OpenVidu Recording Advanced Node
+
+Simple video-call application with recording capabilities (advanced version). 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-features/recording-advanced/).
+
+## 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-advanced-node
+```
+
+2. Install dependencies
+
+```bash
+npm install
+```
+
+3. Run the application
+
+```bash
+npm start
+```

advanced-features/openvidu-recording-advanced-node-azure/package.json

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+{
+    "name": "openvidu-recording-advanced-node",
+    "version": "1.0.0",
+    "description": "Simple video-call application with recording capabilities (advanced version)",
+    "main": "src/index.js",
+    "type": "module",
+    "scripts": {
+        "start": "node src/index.js"
+    },
+    "dependencies": {
+        "@azure/storage-blob": "12.27.0",
+        "cors": "2.8.5",
+        "dotenv": "16.4.5",
+        "express": "4.21.0",
+        "livekit-server-sdk": "^2.7.2"
+    }
+}

advanced-features/openvidu-recording-advanced-node-azure/public/app.js

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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);
+        }
+    });
+
+    // When recording status changes...
+    room.on(LivekitClient.RoomEvent.RoomMetadataChanged, async (metadata) => {
+        const { recordingStatus } = JSON.parse(metadata);
+        await updateRecordingInfo(recordingStatus);
+    });
+
+    // When a message is received...
+    room.on(LivekitClient.RoomEvent.DataReceived, async (payload, _participant, _kind, topic) => {
+        // If the message is a recording deletion notification, remove the recording from the list
+        if (topic === "RECORDING_DELETED") {
+            const { recordingName } = JSON.parse(new TextDecoder().decode(payload));
+            deleteRecordingContainer(recordingName);
+        }
+    });
+
+    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);
+
+        // Update recording info
+        const { recordingStatus } = JSON.parse(room.metadata);
+        await updateRecordingInfo(recordingStatus);
+
+        if (recordingStatus !== "STOPPED" && recordingStatus !== "FAILED") {
+            const roomId = await room.getSid();
+            await listRecordings(room.name, roomId);
+        }
+    } 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();
+
+    // Remove all recordings from the list
+    removeAllRecordings();
+
+    // Reset recording state
+    document.getElementById("recording-button").disabled = false;
+    document.getElementById("recording-button").innerText = "Start Recording";
+    document.getElementById("recording-button").className = "btn btn-primary";
+    document.getElementById("recording-text").hidden = true;
+
+    // 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();
+};
+
+document.addEventListener("DOMContentLoaded", async function () {
+    var currentPage = window.location.pathname;
+
+    if (currentPage === "/recordings.html") {
+        await listRecordings();
+    } else {
+        generateFormValues();
+    }
+
+    // Remove recording video when the dialog is closed
+    document.getElementById("recording-video-dialog").addEventListener("close", () => {
+        const recordingVideo = document.getElementById("recording-video");
+        recordingVideo.src = "";
+    });
+});
+
+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 [error, body] = await httpRequest("POST", "/token", {
+        roomName,
+        participantName
+    });
+
+    if (error) {
+        throw new Error(`Failed to get token: ${error.message}`);
+    }
+
+    return body.token;
+}
+
+async function updateRecordingInfo(recordingStatus) {
+    const recordingButton = document.getElementById("recording-button");
+    const recordingText = document.getElementById("recording-text");
+
+    switch (recordingStatus) {
+        case "STARTING":
+            recordingButton.disabled = true;
+            recordingButton.innerText = "Starting...";
+            break;
+        case "STARTED":
+            recordingButton.disabled = false;
+            recordingButton.innerText = "Stop Recording";
+            recordingButton.className = "btn btn-danger";
+            recordingText.hidden = false;
+            break;
+        case "STOPPING":
+            recordingButton.disabled = true;
+            recordingButton.innerText = "Stopping...";
+            recordingButton.className = "btn btn-danger";
+            recordingText.hidden = false;
+            break;
+        case "STOPPED":
+        case "FAILED":
+            recordingButton.disabled = false;
+            recordingButton.innerText = "Start Recording";
+            recordingButton.className = "btn btn-primary";
+            recordingText.hidden = true;
+
+            const roomId = await room.getSid();
+            await listRecordings(room.name, roomId);
+            break;
+    }
+}
+
+async function manageRecording() {
+    const recordingButton = document.getElementById("recording-button");
+
+    if (recordingButton.innerText === "Start Recording") {
+        await startRecording();
+    } else {
+        await stopRecording();
+    }
+}
+
+async function startRecording() {
+    return httpRequest("POST", "/recordings/start", {
+        roomName: room.name
+    });
+}
+
+async function stopRecording() {
+    return httpRequest("POST", "/recordings/stop", {
+        roomName: room.name
+    });
+}
+
+async function deleteRecording(recordingName) {
+    const [error, _] = await httpRequest("DELETE", `/recordings/${recordingName}`);
+
+    if (!error || error.status === 404) {
+        deleteRecordingContainer(recordingName);
+    }
+}
+
+function deleteRecordingContainer(recordingName) {
+    const recordingContainer = document.getElementById(recordingName);
+
+    if (recordingContainer) {
+        recordingContainer.remove();
+
+        const recordingsList = document.getElementById("recording-list");
+
+        if (recordingsList.children.length === 0) {
+            recordingsList.innerHTML = "<span>There are no recordings available</span>";
+        }
+    }
+}
+
+async function listRecordings(roomName, roomId) {
+    const url = "/recordings" + (roomName ? `?roomName=${roomName}` + (roomId ? `&roomId=${roomId}` : "") : "");
+    const [error, body] = await httpRequest("GET", url);
+
+    if (!error) {
+        const recordings = body.recordings;
+        showRecordingList(recordings);
+    }
+}
+
+async function listRecordingsByRoom() {
+    const roomName = document.getElementById("room-name").value;
+    await listRecordings(roomName);
+}
+
+async function getRecordingUrl(recordingName) {
+    const [_, body] = await httpRequest("GET", `/recordings/${recordingName}/url`);
+    return body?.recordingUrl;
+}
+
+async function httpRequest(method, url, body) {
+    try {
+        const response = await fetch(url, {
+            method,
+            headers: {
+                "Content-Type": "application/json"
+            },
+            body: method !== "GET" ? JSON.stringify(body) : undefined
+        });
+
+        const responseBody = await response.json();
+
+        if (!response.ok) {
+            console.error(responseBody.errorMessage);
+            const error = {
+                status: response.status,
+                message: responseBody.errorMessage
+            };
+            return [error, undefined];
+        }
+
+        return [undefined, responseBody];
+    } catch (error) {
+        console.error(error.message);
+        const errorObj = {
+            status: 0,
+            message: error.message
+        };
+        return [errorObj, undefined];
+    }
+}
+
+function showRecordingList(recordings) {
+    const recordingsList = document.getElementById("recording-list");
+
+    if (recordings.length === 0) {
+        recordingsList.innerHTML = "<span>There are no recordings available</span>";
+    } else {
+        recordingsList.innerHTML = "";
+    }
+
+    recordings.forEach((recording) => {
+        const recordingName = recording.name;
+        const recordingDuration = secondsToHms(recording.duration ?? 0);
+        const recordingSize = formatBytes(recording.size ?? 0);
+        const recordingDate = new Date(recording.startedAt).toLocaleString();
+
+        const recordingContainer = document.createElement("div");
+        recordingContainer.className = "recording-container";
+        recordingContainer.id = recordingName;
+
+        recordingContainer.innerHTML = `
+            <i class="fa-solid fa-file-video"></i>
+            <div class="recording-info">
+                <p class="recording-name">${recordingName}</p>
+                <p class="recording-size">${recordingDuration} | ${recordingSize}</p>
+                <p class="recording-date">${recordingDate}</p>
+            </div>
+            <div class="recording-actions">
+                <button title="Play" class="icon-button" onclick="displayRecording('${recordingName}')">
+                    <i class="fa-solid fa-play"></i>
+                </button>
+                <button title="Delete" class="icon-button delete-button" onclick="deleteRecording('${recordingName}')">
+                    <i class="fa-solid fa-trash"></i>
+                </button>
+            </div>
+        `;
+
+        recordingsList.append(recordingContainer);
+    });
+}
+
+async function displayRecording(recordingName) {
+    const recordingVideoDialog = document.getElementById("recording-video-dialog");
+    recordingVideoDialog.showModal();
+    const recordingVideo = document.getElementById("recording-video");
+
+    const recordingUrl = await getRecordingUrl(recordingName);
+    recordingVideo.src = recordingUrl;
+}
+
+function closeRecording() {
+    const recordingVideoDialog = document.getElementById("recording-video-dialog");
+    recordingVideoDialog.close();
+}
+
+function removeAllRecordings() {
+    const recordingList = document.getElementById("recording-list").children;
+    Array.from(recordingList).forEach((recording) => {
+        recording.remove();
+    });
+}
+
+function secondsToHms(seconds) {
+    const h = Math.floor(seconds / 3600);
+    const m = Math.floor((seconds % 3600) / 60);
+    const s = Math.floor((seconds % 3600) % 60);
+
+    const hDisplay = h > 0 ? h + "h " : "";
+    const mDisplay = m > 0 ? m + "m " : "";
+    const sDisplay = s + "s";
+    return hDisplay + mDisplay + sDisplay;
+}
+
+function formatBytes(bytes) {
+    if (bytes === 0) {
+        return "0Bytes";
+    }
+
+    const k = 1024;
+    const sizes = ["Bytes", "KB", "MB", "GB"];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    const decimals = i < 2 ? 0 : 1;
+
+    return (bytes / Math.pow(k, i)).toFixed(decimals) + sizes[i];
+}

advanced-features/openvidu-recording-advanced-node-azure/public/index.html

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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@2.5.9/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>
+                <a href="/recordings.html" class="btn btn-primary">View all recordings</a>
+            </div>
+
+            <div id="room" hidden>
+                <div id="recording-text" hidden><span>Room is being recorded</span></div>
+                <div id="room-header">
+                    <h2 id="room-title"></h2>
+                    <button class="btn btn-primary" id="recording-button" onclick="manageRecording()">
+                        Start Recording
+                    </button>
+                    <button class="btn btn-danger" id="leave-room-button" onclick="leaveRoom()">Leave Room</button>
+                </div>
+                <div id="layout-container"></div>
+                <div id="recordings">
+                    <div id="recording-header">
+                        <h3>Session Recordings</h3>
+                        <a href="/recordings.html" target="_blank" class="btn btn-sm btn-primary"
+                            >View all recordings</a
+                        >
+                    </div>
+                    <div id="recording-list"></div>
+                    <dialog id="recording-video-dialog">
+                        <video id="recording-video" autoplay controls></video>
+                        <button class="btn btn-secondary" id="close-recording-video-dialog" onclick="closeRecording()">
+                            Close
+                        </button>
+                    </dialog>
+                </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>

advanced-features/openvidu-recording-advanced-node-azure/public/recordings.html

@@ -0,0 +1,89 @@
+<!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@2.5.9/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="recordings-all">
+                <div id="actions">
+                    <button id="refresh-button" title="Refresh" class="icon-button" onclick="listRecordings()">
+                        <i class="fas fa-sync-alt"></i>
+                    </button>
+                    <form onsubmit="listRecordingsByRoom(); return false">
+                        <input id="room-name" type="text" placeholder="Room name" />
+                        <button title="Search" type="submit">
+                            <i class="fas fa-search"></i>
+                        </button>
+                    </form>
+                </div>
+
+                <h2>Recordings</h2>
+                <div id="recording-list"></div>
+                <dialog id="recording-video-dialog">
+                    <video id="recording-video" autoplay controls></video>
+                    <button class="btn btn-secondary" id="close-recording-video-dialog" onclick="closeRecording()">
+                        Close
+                    </button>
+                </dialog>
+            </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>

advanced-features/openvidu-recording-advanced-node-azure/public/styles.css

@@ -0,0 +1,479 @@
+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;
+    gap: 20px;
+    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;
+}
+
+#recording-text {
+    width: 100%;
+    max-width: 1000px;
+}
+
+#recording-text span {
+    background-color: #ffeb3b;
+    color: #333;
+    border-radius: 5px;
+    padding: 0 5px;
+    font-weight: bold;
+    font-style: italic;
+    float: right;
+    margin-bottom: 10px;
+}
+
+#room-header {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 10px;
+    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;
+}
+
+#recordings {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    width: 100%;
+    max-width: 1000px;
+}
+
+#recording-header {
+    margin: 15px 0;
+    width: 100%;
+    display: grid;
+    grid-template-columns: 1fr 3fr 1fr;
+    align-items: center;
+    gap: 10px;
+}
+
+#recording-header h3 {
+    margin: 0;
+    text-align: center;
+    font-size: 30px;
+    font-weight: bold;
+    color: #444;
+    grid-column-start: 2;
+}
+
+#recording-header a {
+    margin-left: auto;
+}
+
+#recording-list {
+    width: 600px;
+    max-width: 100%;
+}
+
+#recording-list span {
+    font-size: 16px;
+    font-weight: bold;
+    font-style: italic;
+    color: #333;
+    display: block;
+    margin: 0;
+    text-align: center;
+}
+
+.recording-container {
+    display: flex;
+    align-items: center;
+    border: 1px solid #dcdcdc;
+    border-radius: 5px;
+    padding: 10px;
+    background-color: #f4f4f4;
+    margin: 10px;
+}
+
+.fa-file-video {
+    font-size: 30px;
+    color: #333;
+    margin-right: 10px;
+}
+
+.recording-info {
+    flex-grow: 1;
+    font-size: 14px;
+    color: #333;
+}
+
+.recording-info p {
+    margin: 0;
+}
+
+.recording-name {
+    font-weight: bold;
+}
+
+.recording-size,
+.recording-date {
+    color: #777;
+}
+
+.recording-date {
+    font-style: italic;
+}
+
+.recording-actions {
+    display: flex;
+    align-items: center;
+}
+
+.icon-button {
+    background-color: transparent;
+    border: none;
+    color: #333;
+    margin-left: 10px;
+    padding: 4px 12px;
+    text-align: center;
+    text-decoration: none;
+    display: inline-block;
+    font-size: 20px;
+    cursor: pointer;
+    border-radius: 50%;
+    transition: background-color 0.3s ease;
+}
+
+.icon-button:hover {
+    background-color: #e0e0e0;
+}
+
+.delete-button {
+    color: #d9534f;
+}
+
+#recording-video-dialog {
+    width: 500px;
+    max-width: 90%;
+    border: none;
+    border-radius: 8px;
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
+    padding: 20px;
+    background-color: #fff;
+}
+
+#recording-video {
+    width: 100%;
+    border-radius: 5px;
+}
+
+#close-recording-video-dialog {
+    margin-top: 10px;
+    float: right;
+}
+
+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;
+    }
+}
+
+/* Recordings page styles */
+#actions {
+    display: flex;
+    justify-content: flex-end;
+    align-items: center;
+    gap: 10px;
+    width: 100%;
+    max-width: 1000px;
+    margin-bottom: 20px;
+}
+
+#refresh-button {
+    margin: 0;
+    padding: 8px 13px;
+}
+
+form input {
+    padding: 8px;
+    font-size: 16px;
+    border: 1px solid #ccc;
+    border-radius: 5px 0 0 5px;
+}
+
+form button {
+    padding: 8px;
+    font-size: 16px;
+    border: 1px solid #ccc;
+    border-left: none;
+    background-color: #007bff;
+    color: #fff;
+    cursor: pointer;
+    border-radius: 0 5px 5px 0;
+}
+
+.search-form button:hover {
+    background-color: #0056b3;
+}
+
+#recordings-all {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+}
+
+#recordings-all h2 {
+    width: 100%;
+    max-width: 1000px;
+    margin-bottom: 20px;
+    font-size: 40px;
+    font-weight: bold;
+    text-align: center;
+    color: #444;
+}

advanced-features/openvidu-recording-advanced-node-azure/src/config.js

@@ -0,0 +1,18 @@
+export const SERVER_PORT = process.env.SERVER_PORT || 6080;
+export const APP_NAME = "openvidu-recording-advanced-node";
+
+// LiveKit configuration
+export const LIVEKIT_URL = process.env.LIVEKIT_URL || "http://localhost:7880";
+export const LIVEKIT_API_KEY = process.env.LIVEKIT_API_KEY || "devkey";
+export const LIVEKIT_API_SECRET = process.env.LIVEKIT_API_SECRET || "secret";
+
+// Azure Blob Storage configuration
+export const AZURE_ACCOUNT_NAME = process.env.AZURE_ACCOUNT_NAME || "your_account_name";
+export const AZURE_ACCOUNT_KEY = process.env.AZURE_ACCOUNT_KEY || "your_account_key";
+export const AZURE_CONTAINER_NAME = process.env.AZURE_CONTAINER_NAME || "openvidu-appdata";
+export const AZURE_ENDPOINT = process.env.AZURE_ENDPOINT || `https://${AZURE_ACCOUNT_NAME}.blob.core.windows.net`;
+
+export const RECORDINGS_PATH = process.env.RECORDINGS_PATH ?? "recordings/";
+export const RECORDINGS_METADATA_PATH = ".metadata/";
+export const RECORDING_PLAYBACK_STRATEGY = process.env.RECORDING_PLAYBACK_STRATEGY || "AZURE"; // PROXY or S3
+export const RECORDING_FILE_PORTION_SIZE = 5 * 1024 * 1024; // 5MB

advanced-features/openvidu-recording-advanced-node-azure/src/controllers/recording.controller.js

@@ -0,0 +1,155 @@
+import { Router } from "express";
+import { RecordingService } from "../services/recording.service.js";
+import { RoomService } from "../services/room.service.js";
+import { RECORDING_PLAYBACK_STRATEGY } from "../config.js";
+
+const recordingService = new RecordingService();
+const roomService = new RoomService();
+
+export const recordingController = Router();
+
+recordingController.post("/start", async (req, res) => {
+    const { roomName } = req.body;
+
+    if (!roomName) {
+        res.status(400).json({ errorMessage: "roomName is required" });
+        return;
+    }
+
+    const activeRecording = await recordingService.getActiveRecordingByRoom(roomName);
+
+    // Check if there is already an active recording for this room
+    if (activeRecording) {
+        res.status(409).json({ errorMessage: "Recording already started for this room" });
+        return;
+    }
+
+    try {
+        const recording = recordingService.startRecording(roomName);
+        res.json({ message: "Recording started", recording });
+    } catch (error) {
+        console.error("Error starting recording.", error);
+        res.status(500).json({ errorMessage: "Error starting recording" });
+    }
+});
+
+recordingController.post("/stop", async (req, res) => {
+    const { roomName } = req.body;
+
+    if (!roomName) {
+        res.status(400).json({ errorMessage: "roomName is required" });
+        return;
+    }
+
+    const activeRecording = await recordingService.getActiveRecordingByRoom(roomName);
+
+    // Check if there is an active recording for this room
+    if (!activeRecording) {
+        res.status(409).json({ errorMessage: "Recording not started for this room" });
+        return;
+    }
+
+    try {
+        const recording = await recordingService.stopRecording(activeRecording);
+        res.json({ message: "Recording stopped", recording });
+    } catch (error) {
+        console.error("Error stopping recording.", error);
+        res.status(500).json({ errorMessage: "Error stopping recording" });
+    }
+});
+
+recordingController.get("/", async (req, res) => {
+    const roomName = req.query.roomName?.toString();
+    const roomId = req.query.roomId?.toString();
+
+    try {
+        const recordings = await recordingService.listRecordings(roomName, roomId);
+        res.json({ recordings });
+    } catch (error) {
+        console.error("Error listing recordings.", error);
+        res.status(500).json({ errorMessage: "Error listing recordings" });
+    }
+});
+
+recordingController.get("/:recordingName", async (req, res) => {
+    const { recordingName } = req.params;
+    const { range } = req.headers;
+    const exists = await recordingService.existsRecording(recordingName);
+
+    if (!exists) {
+        res.status(404).json({ errorMessage: "Recording not found" });
+        return;
+    }
+
+    try {
+        // Get the recording file from Azure Blob Storage
+        const { stream, size, start, end } = await recordingService.getRecordingStream(recordingName, range);
+
+        // Set response headers
+        res.status(206);
+        res.setHeader("Cache-Control", "no-cache");
+        res.setHeader("Content-Type", "video/mp4");
+        res.setHeader("Accept-Ranges", "bytes");
+        res.setHeader("Content-Range", `bytes ${start}-${end}/${size}`);
+        res.setHeader("Content-Length", end - start + 1);
+
+        // Pipe the recording file to the response
+        stream.pipe(res).on("finish", () => res.end());
+    } catch (error) {
+        console.error("Error getting recording.", error);
+        res.status(500).json({ errorMessage: "Error getting recording" });
+    }
+});
+
+recordingController.get("/:recordingName/url", async (req, res) => {
+    console.log("Getting recording URL...");
+    const { recordingName } = req.params;
+    const exists = await recordingService.existsRecording(recordingName);
+
+    if (!exists) {
+        res.status(404).json({ errorMessage: "Recording not found" });
+        return;
+    }
+
+    // If the recording playback strategy is "PROXY", return the endpoint URL
+    if (RECORDING_PLAYBACK_STRATEGY === "PROXY") {
+        res.json({ recordingUrl: `/recordings/${recordingName}` });
+        return;
+    }
+
+    try {
+        // If the recording playback strategy is "Azure Blob Storage", return a signed URL to access the recording directly from Azure Blob Storage
+        const recordingUrl = await recordingService.getRecordingUrl(recordingName);
+        res.json({ recordingUrl });
+    } catch (error) {
+        console.error("Error getting recording URL.", error);
+        res.status(500).json({ errorMessage: "Error getting recording URL" });
+    }
+});
+
+recordingController.delete("/:recordingName", async (req, res) => {
+    const { recordingName } = req.params;
+    const exists = await recordingService.existsRecording(recordingName);
+
+    if (!exists) {
+        res.status(404).json({ errorMessage: "Recording not found" });
+        return;
+    }
+
+    try {
+        const { roomName } = await recordingService.getRecordingMetadata(recordingName);
+        await recordingService.deleteRecording(recordingName);
+
+        // Notify to all participants that the recording was deleted
+        const existsRoom = await roomService.exists(roomName);
+
+        if (existsRoom) {
+            await roomService.sendDataToRoom(roomName, { recordingName });
+        }
+
+        res.json({ message: "Recording deleted" });
+    } catch (error) {
+        console.error("Error deleting recording.", error);
+        res.status(500).json({ errorMessage: "Error deleting recording" });
+    }
+});

advanced-features/openvidu-recording-advanced-node-azure/src/controllers/room.controller.js

@@ -0,0 +1,38 @@
+import { Router } from "express";
+import { AccessToken } from "livekit-server-sdk";
+import { LIVEKIT_API_KEY, LIVEKIT_API_SECRET } from "../config.js";
+import { RoomService } from "../services/room.service.js";
+
+const roomService = new RoomService();
+
+export const roomController = Router();
+
+roomController.post("/", 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({ room: roomName, roomJoin: true, roomRecord: true });
+    const token = await at.toJwt();
+
+    try {
+        // Create room if it doesn't exist
+        const exists = await roomService.exists(roomName);
+
+        if (!exists) {
+            await roomService.createRoom(roomName);
+        }
+
+        res.json({ token });
+    } catch (error) {
+        console.error("Error creating room.", error);
+        res.status(500).json({ errorMessage: "Error creating room" });
+    }
+});

advanced-features/openvidu-recording-advanced-node-azure/src/controllers/webhook.controller.js

@@ -0,0 +1,76 @@
+import express, { Router } from "express";
+import { WebhookReceiver } from "livekit-server-sdk";
+import { LIVEKIT_API_KEY, LIVEKIT_API_SECRET, APP_NAME } from "../config.js";
+import { RoomService } from "../services/room.service.js";
+import { RecordingService } from "../services/recording.service.js";
+
+const webhookReceiver = new WebhookReceiver(LIVEKIT_API_KEY, LIVEKIT_API_SECRET);
+const roomService = new RoomService();
+const recordingService = new RecordingService();
+
+export const webhookController = Router();
+webhookController.use(express.raw({ type: "application/webhook+json" }));
+
+webhookController.post("/", async (req, res) => {
+    try {
+        const webhookEvent = await webhookReceiver.receive(req.body, req.get("Authorization"));
+        const isWebhookRelatedToMe = await checkWebhookRelatedToMe(webhookEvent);
+
+        if (isWebhookRelatedToMe) {
+            console.log(webhookEvent);
+            const { event: eventType, egressInfo } = webhookEvent;
+
+            switch (eventType) {
+                case "egress_started":
+                case "egress_updated":
+                    await notifyRecordingStatusUpdate(egressInfo);
+                    break;
+                case "egress_ended":
+                    await handleEgressEnded(egressInfo);
+                    break;
+            }
+        }
+    } catch (error) {
+        console.error("Error validating webhook event.", error);
+    }
+
+    res.status(200).send();
+});
+
+const checkWebhookRelatedToMe = async (webhookEvent) => {
+    const { room, egressInfo, ingressInfo } = webhookEvent;
+    let roomInfo = room;
+
+    if (!room || !room.metadata) {
+        const roomName = room?.name ?? egressInfo?.roomName ?? ingressInfo?.roomName;
+        roomInfo = await roomService.getRoom(roomName);
+
+        if (!roomInfo) {
+            return false;
+        }
+    }
+
+    const metadata = roomInfo.metadata ? JSON.parse(roomInfo.metadata) : null;
+    return metadata?.createdBy === APP_NAME;
+};
+
+const handleEgressEnded = async (egressInfo) => {
+    try {
+        await recordingService.saveRecordingMetadata(egressInfo);
+    } catch (error) {
+        console.error("Error saving recording metadata.", error);
+    }
+
+    await notifyRecordingStatusUpdate(egressInfo);
+};
+
+const notifyRecordingStatusUpdate = async (egressInfo) => {
+    const roomName = egressInfo.roomName;
+    const recordingStatus = recordingService.getRecordingStatus(egressInfo.status);
+
+    try {
+        await roomService.updateRoomMetadata(roomName, recordingStatus);
+    } catch (error) {
+        console.error("Error updating room metadata.", error);
+    }
+};

advanced-features/openvidu-recording-advanced-node-azure/src/index.js

@@ -0,0 +1,27 @@
+import "dotenv/config.js";
+import express from "express";
+import cors from "cors";
+import path from "path";
+import { fileURLToPath } from "url";
+import { SERVER_PORT } from "./config.js";
+import { roomController } from "./controllers/room.controller.js";
+import { recordingController } from "./controllers/recording.controller.js";
+import { webhookController } from "./controllers/webhook.controller.js";
+
+const app = express();
+
+app.use(cors());
+app.use(express.json());
+
+// Set the static files location
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+app.use(express.static(path.join(__dirname, "../public")));
+
+app.use("/token", roomController);
+app.use("/recordings", recordingController);
+app.use("/livekit/webhook", webhookController);
+
+app.listen(SERVER_PORT, () => {
+    console.log("Server started on port:", SERVER_PORT);
+});

advanced-features/openvidu-recording-advanced-node-azure/src/services/azure.blobstorage.service.js

@@ -0,0 +1,147 @@
+import {
+    BlobServiceClient,
+    StorageSharedKeyCredential,
+    generateBlobSASQueryParameters,
+    BlobSASPermissions,
+    SASProtocol
+} from "@azure/storage-blob";
+import {
+    AZURE_CONTAINER_NAME,
+    AZURE_ACCOUNT_NAME,
+    AZURE_ACCOUNT_KEY,
+    AZURE_ENDPOINT
+} from "../config.js";
+
+export class AzureBlobService {
+    static instance;
+
+    constructor() {
+        if (AzureBlobService.instance) {
+            return AzureBlobService.instance;
+        }
+        const sharedKeyCredential = new StorageSharedKeyCredential(
+            AZURE_ACCOUNT_NAME,
+            AZURE_ACCOUNT_KEY
+        );
+
+        this.blobServiceClient = new BlobServiceClient(
+            AZURE_ENDPOINT,
+            sharedKeyCredential
+        );
+
+        this.containerClient = this.blobServiceClient.getContainerClient(
+            AZURE_CONTAINER_NAME
+        );
+
+        AzureBlobService.instance = this;
+        return this;
+    }
+
+    static getInstance() {
+        if (!AzureBlobService.instance) {
+            AzureBlobService.instance = new AzureBlobService();
+        }
+        return AzureBlobService.instance;
+    }
+
+    // Uploads an object (JSON) to the container
+    async uploadObject(key, body) {
+        const blockBlobClient = this.containerClient.getBlockBlobClient(key);
+        const data = JSON.stringify(body);
+        await blockBlobClient.upload(data, Buffer.byteLength(data));
+    }
+
+    // Checks if a blob exists
+    async exists(key) {
+        const blobClient = this.containerClient.getBlobClient(key);
+        return await blobClient.exists();
+    }
+
+    // Gets the blob properties (equivalent to headObject)
+    async headObject(key) {
+        const blobClient = this.containerClient.getBlobClient(key);
+        return await blobClient.getProperties();
+    }
+
+    // Returns the blob size in bytes
+    async getObjectSize(key) {
+        const props = await this.headObject(key);
+        return props.contentLength || 0;
+    }
+
+    // Downloads the complete blob or a range, returning the stream
+    async getObject(key, range) {
+        const blobClient = this.containerClient.getBlobClient(key);
+        let downloadResponse;
+        if (range) {
+            // range = { start: number, end: number }
+            const count = range.end - range.start + 1;
+            downloadResponse = await blobClient.download(range.start, count);
+        } else {
+            downloadResponse = await blobClient.download();
+        }
+        if (!downloadResponse.readableStreamBody) {
+            throw new Error("Could not obtain the blob stream");
+        }
+        return downloadResponse.readableStreamBody;
+    }
+
+    // Generates a valid SAS URL for 24 hours
+    async getObjectUrl(key) {
+        if (!AZURE_ACCOUNT_NAME || !AZURE_ACCOUNT_KEY) {
+            throw new Error("Azure account credentials are not defined to generate SAS");
+        }
+        const blobClient = this.containerClient.getBlobClient(key);
+        const expiresOn = new Date(new Date().valueOf() + 24 * 60 * 60 * 1000); // 24 hours
+        const sasPermissions = BlobSASPermissions.parse("r");
+        const sasToken = generateBlobSASQueryParameters(
+            {
+                containerName: AZURE_CONTAINER_NAME,
+                blobName: key,
+                expiresOn,
+                permissions: sasPermissions,
+                protocol: SASProtocol.Https
+            },
+            new StorageSharedKeyCredential(AZURE_ACCOUNT_NAME, AZURE_ACCOUNT_KEY)
+        ).toString();
+
+        return `${blobClient.url}?${sasToken}`;
+    }
+
+    // Gets the JSON content of the blob
+    async getObjectAsJson(key) {
+        const exists = await this.exists(key);
+        if (!exists) {
+            return undefined;
+        }
+        const stream = await this.getObject(key);
+        return new Promise((resolve, reject) => {
+            const chunks = [];
+            stream.on("data", (data) => {
+                chunks.push(Buffer.isBuffer(data) ? data : Buffer.from(data));
+            });
+            stream.on("end", () => {
+                const content = Buffer.concat(chunks).toString("utf-8");
+                resolve(JSON.parse(content));
+            });
+            stream.on("error", reject);
+        });
+    }
+
+    // Lists blobs under a prefix and filters by regular expression
+    async listObjects(prefix, regex) {
+        const results = [];
+        for await (const blob of this.containerClient.listBlobsFlat({ prefix })) {
+            if (blob.name && regex.test(blob.name)) {
+                results.push(blob.name);
+            }
+        }
+        return results;
+    }
+
+    // Deletes a blob
+    async deleteObject(key) {
+        const blobClient = this.containerClient.getBlobClient(key);
+        await blobClient.delete();
+    }
+}

advanced-features/openvidu-recording-advanced-node-azure/src/services/recording.service.js

@@ -0,0 +1,157 @@
+import { EgressClient, EgressStatus, EncodedFileOutput, EncodedFileType } from "livekit-server-sdk";
+import {
+    LIVEKIT_URL,
+    LIVEKIT_API_KEY,
+    LIVEKIT_API_SECRET,
+    RECORDINGS_PATH,
+    RECORDINGS_METADATA_PATH,
+    RECORDING_FILE_PORTION_SIZE
+} from "../config.js";
+import { AzureBlobService } from "./azure.blobstorage.service.js";
+
+const azureBlobService = new AzureBlobService();
+
+export class RecordingService {
+    static instance;
+
+    constructor() {
+        if (RecordingService.instance) {
+            return RecordingService.instance;
+        }
+
+        this.egressClient = new EgressClient(LIVEKIT_URL, LIVEKIT_API_KEY, LIVEKIT_API_SECRET);
+        RecordingService.instance = this;
+        return this;
+    }
+
+    async startRecording(roomName) {
+        // Use the EncodedFileOutput to save the recording to an MP4 file
+        const fileOutput = new EncodedFileOutput({
+            fileType: EncodedFileType.MP4,
+            filepath: `${RECORDINGS_PATH}{room_name}-{room_id}-{time}`,
+            disableManifest: true
+        });
+        // Start a RoomCompositeEgress to record all participants in the room
+        const egressInfo = await this.egressClient.startRoomCompositeEgress(roomName, { file: fileOutput });
+        return this.convertToRecordingInfo(egressInfo);
+    }
+
+    async stopRecording(recordingId) {
+        // Stop the egress to finish the recording
+        const egressInfo = await this.egressClient.stopEgress(recordingId);
+        return this.convertToRecordingInfo(egressInfo);
+    }
+
+    async listRecordings(roomName, roomId) {
+        const keyStart =
+            RECORDINGS_PATH + RECORDINGS_METADATA_PATH + (roomName ? `${roomName}-` + (roomId ? roomId : "") : "");
+        const keyEnd = ".json";
+        const regex = new RegExp(`^${keyStart}.*${keyEnd}$`);
+
+        // List all egress metadata files in the recordings path that match the regex
+        const metadataKeys = await azureBlobService.listObjects(RECORDINGS_PATH + RECORDINGS_METADATA_PATH, regex);
+        const recordings = await Promise.all(metadataKeys.map((metadataKey) => azureBlobService.getObjectAsJson(metadataKey)));
+        return this.filterAndSortRecordings(recordings, roomName, roomId);
+    }
+
+    filterAndSortRecordings(recordings, roomName, roomId) {
+        let filteredRecordings = recordings;
+
+        if (roomName || roomId) {
+            filteredRecordings = recordings.filter((recording) => {
+                return (!roomName || recording.roomName === roomName) && (!roomId || recording.roomId === roomId);
+            });
+        }
+
+        return filteredRecordings.sort((a, b) => b.startedAt - a.startedAt);
+    }
+
+    async getActiveRecordingByRoom(roomName) {
+        try {
+            // List all active egresses for the room
+            const egresses = await this.egressClient.listEgress({ roomName, active: true });
+            return egresses.length > 0 ? egresses[0].egressId : null;
+        } catch (error) {
+            console.error("Error listing egresses.", error);
+            return null;
+        }
+    }
+
+    async getRecordingMetadata(recordingName) {
+        const key = this.getMetadataKey(recordingName);
+        return azureBlobService.getObjectAsJson(key);
+    }
+
+    async getRecordingStream(recordingName, range) {
+        const key = this.getRecordingKey(recordingName);
+        const size = await azureBlobService.getObjectSize(key);
+
+        // Get the requested range
+        const parts = range?.replace(/bytes=/, "").split("-");
+        const start = range ? parseInt(parts[0], 10) : 0;
+        const endRange = parts[1] ? parseInt(parts[1], 10) : start + RECORDING_FILE_PORTION_SIZE;
+        const end = Math.min(endRange, size - 1);
+
+        const stream = await azureBlobService.getObject(key, { start, end });
+        return { stream, size, start, end };
+    }
+
+    async getRecordingUrl(recordingName) {
+        const key = this.getRecordingKey(recordingName);
+        return azureBlobService.getObjectUrl(key);
+    }
+
+    async existsRecording(recordingName) {
+        const key = this.getRecordingKey(recordingName);
+        return azureBlobService.exists(key);
+    }
+
+    async deleteRecording(recordingName) {
+        const recordingKey = this.getRecordingKey(recordingName);
+        const metadataKey = this.getMetadataKey(recordingName);
+        // Delete the recording file and metadata file from Azure
+        await Promise.all([azureBlobService.deleteObject(recordingKey), azureBlobService.deleteObject(metadataKey)]);
+    }
+
+    async saveRecordingMetadata(egressInfo) {
+        const recordingInfo = this.convertToRecordingInfo(egressInfo);
+        const key = this.getMetadataKey(recordingInfo.name);
+        await azureBlobService.uploadObject(key, recordingInfo);
+    }
+
+    convertToRecordingInfo(egressInfo) {
+        const file = egressInfo.fileResults[0];
+        return {
+            id: egressInfo.egressId,
+            name: file.filename.split("/").pop(),
+            roomName: egressInfo.roomName,
+            roomId: egressInfo.roomId,
+            startedAt: Number(egressInfo.startedAt) / 1_000_000,
+            duration: Number(file.duration) / 1_000_000_000,
+            size: Number(file.size)
+        };
+    }
+
+    getRecordingStatus(egressStatus) {
+        switch (egressStatus) {
+            case EgressStatus.EGRESS_STARTING:
+                return "STARTING";
+            case EgressStatus.EGRESS_ACTIVE:
+                return "STARTED";
+            case EgressStatus.EGRESS_ENDING:
+                return "STOPPING";
+            case EgressStatus.EGRESS_COMPLETE:
+                return "STOPPED";
+            default:
+                return "FAILED";
+        }
+    }
+
+    getRecordingKey(recordingName) {
+        return RECORDINGS_PATH + recordingName;
+    }
+
+    getMetadataKey(recordingName) {
+        return RECORDINGS_PATH + RECORDINGS_METADATA_PATH + recordingName.replace(".mp4", ".json");
+    }
+}

advanced-features/openvidu-recording-advanced-node-azure/src/services/room.service.js

@@ -0,0 +1,61 @@
+import { DataPacket_Kind, RoomServiceClient } from "livekit-server-sdk";
+import { LIVEKIT_URL, LIVEKIT_API_KEY, LIVEKIT_API_SECRET, APP_NAME } from "../config.js";
+
+const encoder = new TextEncoder();
+
+export class RoomService {
+    static instance;
+
+    constructor() {
+        if (RoomService.instance) {
+            return RoomService.instance;
+        }
+
+        this.roomClient = new RoomServiceClient(LIVEKIT_URL, LIVEKIT_API_KEY, LIVEKIT_API_SECRET);
+        RoomService.instance = this;
+        return this;
+    }
+
+    async createRoom(roomName) {
+        const roomOptions = {
+            name: roomName,
+            metadata: JSON.stringify({
+                createdBy: APP_NAME,
+                recordingStatus: "STOPPED"
+            })
+        };
+        return this.roomClient.createRoom(roomOptions);
+    }
+
+    async getRoom(roomName) {
+        const rooms = await this.roomClient.listRooms([roomName]);
+        return rooms.length > 0 ? rooms[0] : null;
+    }
+
+    async exists(roomName) {
+        const room = await this.getRoom(roomName);
+        return room !== null;
+    }
+
+    async updateRoomMetadata(roomName, recordingStatus) {
+        const metadata = {
+            createdBy: APP_NAME,
+            recordingStatus
+        };
+        return this.roomClient.updateRoomMetadata(roomName, JSON.stringify(metadata));
+    }
+
+    async sendDataToRoom(roomName, rawData) {
+        const data = encoder.encode(JSON.stringify(rawData));
+        const options = {
+            topic: "RECORDING_DELETED",
+            destinationSids: []
+        };
+
+        try {
+            await this.roomClient.sendData(roomName, data, DataPacket_Kind.RELIABLE, options);
+        } catch (error) {
+            console.error("Error sending data to room", error);
+        }
+    }
+}

advanced-features/openvidu-recording-advanced-node/.env

@@ -10,6 +10,6 @@ S3_ENDPOINT=http://localhost:9000
 S3_ACCESS_KEY=minioadmin
 S3_SECRET_KEY=minioadmin
 AWS_REGION=us-east-1
-S3_BUCKET=openvidu
+S3_BUCKET=openvidu-appdata
 RECORDINGS_PATH=recordings/
 RECORDING_PLAYBACK_STRATEGY=S3

advanced-features/openvidu-recording-advanced-node/src/config.js

@@ -11,7 +11,7 @@ export const S3_ENDPOINT = process.env.S3_ENDPOINT || "http://localhost:9000";
 export const S3_ACCESS_KEY = process.env.S3_ACCESS_KEY || "minioadmin";
 export const S3_SECRET_KEY = process.env.S3_SECRET_KEY || "minioadmin";
 export const AWS_REGION = process.env.AWS_REGION || "us-east-1";
-export const S3_BUCKET = process.env.S3_BUCKET || "openvidu";
+export const S3_BUCKET = process.env.S3_BUCKET || "openvidu-appdata";
 
 export const RECORDINGS_PATH = process.env.RECORDINGS_PATH ?? "recordings/";
 export const RECORDINGS_METADATA_PATH = ".metadata/";

advanced-features/openvidu-recording-basic-node-azure/.env

@@ -0,0 +1,11 @@
+SERVER_PORT=6080
+
+# LiveKit configuration
+LIVEKIT_URL=http://localhost:7880
+LIVEKIT_API_KEY=devkey
+LIVEKIT_API_SECRET=secret
+
+# Azure Blob Storage configuration
+AZURE_ACCOUNT_NAME=yourstorageaccountname
+AZURE_ACCOUNT_KEY=youraccountkey
+AZURE_CONTAINER_NAME=openvidu-appdata

advanced-features/openvidu-recording-basic-node-azure/.gitignore

@@ -0,0 +1,129 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

advanced-features/openvidu-recording-basic-node-azure/README.md

@@ -0,0 +1,30 @@
+# OpenVidu Recording Basic Node
+
+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-features/recording-basic/).
+
+## 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-basic-node-azure
+```
+
+2. Install dependencies
+
+```bash
+npm install
+```
+
+3. Run the application
+
+```bash
+npm start
+```

advanced-features/openvidu-recording-basic-node-azure/package.json

@@ -0,0 +1,17 @@
+{
+    "name": "openvidu-recording-basic-node-azure",
+    "version": "1.0.0",
+    "description": "Simple video-call application with recording capabilities",
+    "main": "src/index.js",
+    "type": "module",
+    "scripts": {
+        "start": "NODE_TLS_REJECT_UNAUTHORIZED=0 node src/index.js"
+    },
+    "dependencies": {
+        "@azure/storage-blob": "12.27.0",
+        "cors": "2.8.5",
+        "dotenv": "16.4.7",
+        "express": "5.0.1",
+        "livekit-server-sdk": "^2.9.7"
+    }
+}

advanced-features/openvidu-recording-basic-node-azure/public/app.js

@@ -0,0 +1,393 @@
+// 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);
+      }
+    }
+  );
+
+  // When recording status changes...
+  room.on(
+    LivekitClient.RoomEvent.RecordingStatusChanged,
+    async (isRecording) => {
+      await updateRecordingInfo(isRecording);
+    }
+  );
+
+  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);
+
+    // Update recording info
+    await updateRecordingInfo(room.isRecording);
+  } 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();
+
+  // Remove all recordings from the list
+  removeAllRecordings();
+
+  // Reset recording state
+  document.getElementById("recording-button").disabled = false;
+  document.getElementById("recording-button").innerText = "Start Recording";
+  document.getElementById("recording-button").className = "btn btn-primary";
+  document.getElementById("recording-text").hidden = true;
+
+  // 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();
+};
+
+document.addEventListener("DOMContentLoaded", async function () {
+  var currentPage = window.location.pathname;
+
+  if (currentPage === "/recordings.html") {
+    await listRecordings();
+  } else {
+    generateFormValues();
+  }
+
+  // Remove recording video when the dialog is closed
+  document
+    .getElementById("recording-video-dialog")
+    .addEventListener("close", () => {
+      const recordingVideo = document.getElementById("recording-video");
+      recordingVideo.src = "";
+    });
+});
+
+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 [error, body] = await httpRequest("POST", "/token", {
+    roomName,
+    participantName,
+  });
+
+  if (error) {
+    throw new Error(`Failed to get token: ${error.message}`);
+  }
+
+  return body.token;
+}
+
+async function updateRecordingInfo(isRecording) {
+  const recordingButton = document.getElementById("recording-button");
+  const recordingText = document.getElementById("recording-text");
+
+  if (isRecording) {
+    recordingButton.disabled = false;
+    recordingButton.innerText = "Stop Recording";
+    recordingButton.className = "btn btn-danger";
+    recordingText.hidden = false;
+  } else {
+    recordingButton.disabled = false;
+    recordingButton.innerText = "Start Recording";
+    recordingButton.className = "btn btn-primary";
+    recordingText.hidden = true;
+  }
+
+  const roomId = await room.getSid();
+  await listRecordings(roomId);
+}
+
+async function manageRecording() {
+  const recordingButton = document.getElementById("recording-button");
+
+  if (recordingButton.innerText === "Start Recording") {
+    recordingButton.disabled = true;
+    recordingButton.innerText = "Starting...";
+
+    const [error, _] = await startRecording();
+
+    if (error && error.status !== 409) {
+      recordingButton.disabled = false;
+      recordingButton.innerText = "Start Recording";
+    }
+  } else {
+    recordingButton.disabled = true;
+    recordingButton.innerText = "Stopping...";
+
+    const [error, _] = await stopRecording();
+
+    if (error && error.status !== 409) {
+      recordingButton.disabled = false;
+      recordingButton.innerText = "Stop Recording";
+    }
+  }
+}
+
+async function startRecording() {
+  return httpRequest("POST", "/recordings/start", {
+    roomName: room.name,
+  });
+}
+
+async function stopRecording() {
+  return httpRequest("POST", "/recordings/stop", {
+    roomName: room.name,
+  });
+}
+
+async function deleteRecording(recordingName) {
+  const [error, _] = await httpRequest(
+    "DELETE",
+    `/recordings/${recordingName}`
+  );
+
+  if (!error || error.status === 404) {
+    const roomId = await room?.getSid();
+    await listRecordings(roomId);
+  }
+}
+
+async function listRecordings(roomId) {
+  let url = "/recordings";
+  if (roomId) {
+    url += `?roomId=${roomId}`;
+  }
+  const [error, body] = await httpRequest("GET", url);
+
+  if (!error) {
+    const recordings = body.recordings;
+    showRecordingList(recordings);
+  }
+}
+
+async function httpRequest(method, url, body) {
+  try {
+    const response = await fetch(url, {
+      method,
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: method !== "GET" ? JSON.stringify(body) : undefined,
+    });
+
+    const responseBody = await response.json();
+
+    if (!response.ok) {
+      console.error(responseBody.errorMessage);
+      const error = {
+        status: response.status,
+        message: responseBody.errorMessage,
+      };
+      return [error, undefined];
+    }
+
+    return [undefined, responseBody];
+  } catch (error) {
+    console.error(error.message);
+    const errorObj = {
+      status: 0,
+      message: error.message,
+    };
+    return [errorObj, undefined];
+  }
+}
+
+function showRecordingList(recordings) {
+  const recordingsList = document.getElementById("recording-list");
+
+  if (recordings.length === 0) {
+    recordingsList.innerHTML = "<span>There are no recordings available</span>";
+  } else {
+    recordingsList.innerHTML = "";
+  }
+
+  recordings.forEach((recording) => {
+    const recordingName = recording.name;
+
+    const recordingContainer = document.createElement("div");
+    recordingContainer.className = "recording-container";
+    recordingContainer.id = recordingName;
+
+    recordingContainer.innerHTML = `
+            <i class="fa-solid fa-file-video"></i>
+            <div class="recording-info">
+                <p class="recording-name">${recordingName}</p>
+            </div>
+            <div class="recording-actions">
+                <button title="Play" class="icon-button" onclick="displayRecording('${recordingName}')">
+                    <i class="fa-solid fa-play"></i>
+                </button>
+                <button title="Delete" class="icon-button delete-button" onclick="deleteRecording('${recordingName}')">
+                    <i class="fa-solid fa-trash"></i>
+                </button>
+            </div>
+        `;
+
+    recordingsList.append(recordingContainer);
+  });
+}
+
+function displayRecording(recordingName) {
+  const recordingVideoDialog = document.getElementById(
+    "recording-video-dialog"
+  );
+  recordingVideoDialog.showModal();
+  const recordingVideo = document.getElementById("recording-video");
+  recordingVideo.src = `/recordings/${recordingName}`;
+}
+
+function closeRecording() {
+  const recordingVideoDialog = document.getElementById(
+    "recording-video-dialog"
+  );
+  recordingVideoDialog.close();
+}
+
+function removeAllRecordings() {
+  const recordingList = document.getElementById("recording-list").children;
+  Array.from(recordingList).forEach((recording) => {
+    recording.remove();
+  });
+}

advanced-features/openvidu-recording-basic-node-azure/public/index.html

@@ -0,0 +1,111 @@
+<!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@2.5.9/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>
+                <a href="/recordings.html" class="btn btn-primary">View all recordings</a>
+            </div>
+
+            <div id="room" hidden>
+                <div id="recording-text" hidden><span>Room is being recorded</span></div>
+                <div id="room-header">
+                    <h2 id="room-title"></h2>
+                    <button class="btn btn-primary" id="recording-button" onclick="manageRecording()">
+                        Start Recording
+                    </button>
+                    <button class="btn btn-danger" id="leave-room-button" onclick="leaveRoom()">Leave Room</button>
+                </div>
+                <div id="layout-container"></div>
+                <div id="recordings">
+                    <div id="recording-header">
+                        <h3>Session Recordings</h3>
+                        <a href="/recordings.html" target="_blank" class="btn btn-sm btn-primary"
+                            >View all recordings</a
+                        >
+                    </div>
+                    <div id="recording-list"></div>
+                    <dialog id="recording-video-dialog">
+                        <video id="recording-video" autoplay controls></video>
+                        <button class="btn btn-secondary" id="close-recording-video-dialog" onclick="closeRecording()">
+                            Close
+                        </button>
+                    </dialog>
+                </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>

advanced-features/openvidu-recording-basic-node-azure/public/recordings.html

@@ -0,0 +1,77 @@
+<!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@2.5.9/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="recordings-all">
+                <h2>Recordings</h2>
+                <div id="recording-list"></div>
+                <dialog id="recording-video-dialog">
+                    <video id="recording-video" autoplay controls></video>
+                    <button class="btn btn-secondary" id="close-recording-video-dialog" onclick="closeRecording()">
+                        Close
+                    </button>
+                </dialog>
+            </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>

advanced-features/openvidu-recording-basic-node-azure/public/styles.css

@@ -0,0 +1,479 @@
+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;
+    gap: 20px;
+    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;
+}
+
+#recording-text {
+    width: 100%;
+    max-width: 1000px;
+}
+
+#recording-text span {
+    background-color: #ffeb3b;
+    color: #333;
+    border-radius: 5px;
+    padding: 0 5px;
+    font-weight: bold;
+    font-style: italic;
+    float: right;
+    margin-bottom: 10px;
+}
+
+#room-header {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 10px;
+    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;
+}
+
+#recordings {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    width: 100%;
+    max-width: 1000px;
+}
+
+#recording-header {
+    margin: 15px 0;
+    width: 100%;
+    display: grid;
+    grid-template-columns: 1fr 3fr 1fr;
+    align-items: center;
+    gap: 10px;
+}
+
+#recording-header h3 {
+    margin: 0;
+    text-align: center;
+    font-size: 30px;
+    font-weight: bold;
+    color: #444;
+    grid-column-start: 2;
+}
+
+#recording-header a {
+    margin-left: auto;
+}
+
+#recording-list {
+    width: 600px;
+    max-width: 100%;
+}
+
+#recording-list span {
+    font-size: 16px;
+    font-weight: bold;
+    font-style: italic;
+    color: #333;
+    display: block;
+    margin: 0;
+    text-align: center;
+}
+
+.recording-container {
+    display: flex;
+    align-items: center;
+    border: 1px solid #dcdcdc;
+    border-radius: 5px;
+    padding: 10px;
+    background-color: #f4f4f4;
+    margin: 10px;
+}
+
+.fa-file-video {
+    font-size: 30px;
+    color: #333;
+    margin-right: 10px;
+}
+
+.recording-info {
+    flex-grow: 1;
+    font-size: 14px;
+    color: #333;
+}
+
+.recording-info p {
+    margin: 0;
+}
+
+.recording-name {
+    font-weight: bold;
+}
+
+.recording-size,
+.recording-date {
+    color: #777;
+}
+
+.recording-date {
+    font-style: italic;
+}
+
+.recording-actions {
+    display: flex;
+    align-items: center;
+}
+
+.icon-button {
+    background-color: transparent;
+    border: none;
+    color: #333;
+    margin-left: 10px;
+    padding: 4px 12px;
+    text-align: center;
+    text-decoration: none;
+    display: inline-block;
+    font-size: 20px;
+    cursor: pointer;
+    border-radius: 50%;
+    transition: background-color 0.3s ease;
+}
+
+.icon-button:hover {
+    background-color: #e0e0e0;
+}
+
+.delete-button {
+    color: #d9534f;
+}
+
+#recording-video-dialog {
+    width: 500px;
+    max-width: 90%;
+    border: none;
+    border-radius: 8px;
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
+    padding: 20px;
+    background-color: #fff;
+}
+
+#recording-video {
+    width: 100%;
+    border-radius: 5px;
+}
+
+#close-recording-video-dialog {
+    margin-top: 10px;
+    float: right;
+}
+
+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;
+    }
+}
+
+/* Recordings page styles */
+#actions {
+    display: flex;
+    justify-content: flex-end;
+    align-items: center;
+    gap: 10px;
+    width: 100%;
+    max-width: 1000px;
+    margin-bottom: 20px;
+}
+
+#refresh-button {
+    margin: 0;
+    padding: 8px 13px;
+}
+
+form input {
+    padding: 8px;
+    font-size: 16px;
+    border: 1px solid #ccc;
+    border-radius: 5px 0 0 5px;
+}
+
+form button {
+    padding: 8px;
+    font-size: 16px;
+    border: 1px solid #ccc;
+    border-left: none;
+    background-color: #007bff;
+    color: #fff;
+    cursor: pointer;
+    border-radius: 0 5px 5px 0;
+}
+
+.search-form button:hover {
+    background-color: #0056b3;
+}
+
+#recordings-all {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+}
+
+#recordings-all h2 {
+    width: 100%;
+    max-width: 1000px;
+    margin-bottom: 20px;
+    font-size: 40px;
+    font-weight: bold;
+    text-align: center;
+    color: #444;
+}

advanced-features/openvidu-recording-basic-node-azure/src/azure.blobstorage.service.js

@@ -0,0 +1,91 @@
+import {
+    BlobServiceClient,
+    StorageSharedKeyCredential,
+} from "@azure/storage-blob";
+
+// Azure configuration
+const AZURE_ACCOUNT_NAME = process.env.AZURE_ACCOUNT_NAME || "devstoreaccount";
+const AZURE_ACCOUNT_KEY =
+    process.env.AZURE_ACCOUNT_KEY || "nokey";
+const AZURE_CONTAINER_NAME =
+    process.env.AZURE_CONTAINER_NAME || "openvidu-appdata";
+
+const AZURE_ENDPOINT =
+    process.env.AZURE_ENDPOINT ||
+    `https://${AZURE_ACCOUNT_NAME}.blob.core.windows.net`;
+
+export class AzureBlobService {
+    static instance;
+
+    constructor() {
+        if (AzureBlobService.instance) {
+            return AzureBlobService.instance;
+        }
+
+        const sharedKeyCredential = new StorageSharedKeyCredential(
+            AZURE_ACCOUNT_NAME,
+            AZURE_ACCOUNT_KEY
+        );
+
+        this.blobServiceClient = new BlobServiceClient(
+            AZURE_ENDPOINT,
+            sharedKeyCredential
+        );
+
+        this.containerClient = this.blobServiceClient.getContainerClient(
+            AZURE_CONTAINER_NAME
+        );
+
+        AzureBlobService.instance = this;
+        return this;
+    }
+
+    async exists(key) {
+        const blobClient = this.containerClient.getBlobClient(key);
+        return await blobClient.exists();
+    }
+
+    async getObjectSize(key) {
+        const props = await this.headObject(key);
+        return props.contentLength;
+    }
+
+    async headObject(key) {
+        const blobClient = this.containerClient.getBlobClient(key);
+        const props = await blobClient.getProperties();
+        return props;
+    }
+
+    async getObject(key, range) {
+        const blobClient = this.containerClient.getBlobClient(key);
+        const downloadOptions = range
+            ? {
+                rangeGetContentMD5: false,
+                range: {
+                    offset: range.start,
+                    count: range.end - range.start + 1,
+                },
+            }
+            : {};
+
+        const response = await blobClient.download(
+            downloadOptions.range?.offset ?? 0,
+            downloadOptions.range?.count
+        );
+
+        return response.readableStreamBody;
+    }
+
+    async listObjects() {
+        const result = [];
+        for await (const blob of this.containerClient.listBlobsFlat()) {
+            result.push(blob);
+        }
+        return result;
+    }
+
+    async deleteObject(key) {
+        const blobClient = this.containerClient.getBlobClient(key);
+        return await blobClient.deleteIfExists();
+    }
+}

advanced-features/openvidu-recording-basic-node-azure/src/index.js

@@ -0,0 +1,255 @@
+import "dotenv/config";
+import express from "express";
+import cors from "cors";
+import path from "path";
+import { fileURLToPath } from "url";
+import {
+  AccessToken,
+  EgressClient,
+  EncodedFileOutput,
+  EncodedFileType,
+  WebhookReceiver,
+} from "livekit-server-sdk";
+import { AzureBlobService } from "./azure.blobstorage.service.js";
+
+// Configuration
+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 LIVEKIT_URL = process.env.LIVEKIT_URL || "http://localhost:7880";
+const RECORDING_FILE_PORTION_SIZE = 5 * 1024 * 1024; // 5MB
+
+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(path.join(__dirname, "../public")));
+
+const egressClient = new EgressClient(
+  LIVEKIT_URL,
+  LIVEKIT_API_KEY,
+  LIVEKIT_API_SECRET
+);
+const azureBlobService = new AzureBlobService();
+const webhookReceiver = new WebhookReceiver(
+  LIVEKIT_API_KEY,
+  LIVEKIT_API_SECRET
+);
+
+// Generate access tokens for participants to join a room
+app.post("/token", async (req, res) => {
+  const roomName = req.body.roomName;
+  const participantName = req.body.participantName;
+
+  if (!roomName || !participantName) {
+    return res
+      .status(400)
+      .json({ errorMessage: "roomName and participantName are required" });
+  }
+
+  const at = new AccessToken(LIVEKIT_API_KEY, LIVEKIT_API_SECRET, {
+    identity: participantName,
+  });
+  at.addGrant({ roomJoin: true, room: roomName, roomRecord: true });
+  const token = await at.toJwt();
+
+  return res.json({ token });
+});
+
+// Receive webhooks from LiveKit Server
+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);
+  }
+  return res.status(200).send();
+});
+
+// Start a recording
+app.post("/recordings/start", async (req, res) => {
+  const { roomName } = req.body;
+
+  if (!roomName) {
+    return res.status(400).json({ errorMessage: "roomName is required" });
+  }
+
+  const activeRecording = await getActiveRecordingByRoom(roomName);
+
+  // Check if there is already an active recording for this room
+  if (activeRecording) {
+    return res
+      .status(409)
+      .json({ errorMessage: "Recording already started for this room" });
+  }
+
+  // Use the EncodedFileOutput to save the recording to an MP4 file
+  // The room name, time and room ID in the file path help to organize the recordings
+  const fileOutput = new EncodedFileOutput({
+    fileType: EncodedFileType.MP4,
+    filepath: `RoomComposite-{room_name}-{time}-{room_id}`,
+    disableManifest: true,
+  });
+
+  try {
+    // Start a RoomCompositeEgress to record all participants in the room
+    const egressInfo = await egressClient.startRoomCompositeEgress(roomName, {
+      file: fileOutput,
+    });
+    const recording = {
+      name: egressInfo.fileResults[0].filename.split("/").pop(),
+      startedAt: Number(egressInfo.startedAt) / 1_000_000,
+    };
+    res.json({ message: "Recording started", recording });
+  } catch (error) {
+    console.error("Error starting recording.", error);
+    res.status(500).json({ errorMessage: "Error starting recording" });
+  }
+});
+
+// Stop a recording
+app.post("/recordings/stop", async (req, res) => {
+  const { roomName } = req.body;
+
+  if (!roomName) {
+    return res.status(400).json({ errorMessage: "roomName is required" });
+  }
+
+  const activeRecording = await getActiveRecordingByRoom(roomName);
+
+  // Check if there is an active recording for this room
+  if (!activeRecording) {
+    return res
+      .status(409)
+      .json({ errorMessage: "Recording not started for this room" });
+  }
+
+  try {
+    // Stop the egress to finish the recording
+    const egressInfo = await egressClient.stopEgress(activeRecording);
+    const file = egressInfo.fileResults[0];
+    const recording = {
+      name: file.filename.split("/").pop(),
+    };
+    return res.json({ message: "Recording stopped", recording });
+  } catch (error) {
+    console.error("Error stopping recording.", error);
+    return res.status(500).json({ errorMessage: "Error stopping recording" });
+  }
+});
+
+// List recordings
+app.get("/recordings", async (req, res) => {
+  const roomId = req.query.roomId?.toString();
+  try {
+    const azureResponse = await azureBlobService.listObjects();
+    let recordings = [];
+    if (azureResponse.length > 0) {
+      recordings = azureResponse.map((obj) => ({
+        name: obj.name,
+      }));
+    }
+    // Filter recordings by room ID
+    recordings = recordings.filter((recording) =>
+      roomId ? recording.name.includes(roomId) : true
+    );
+    return res.json({ recordings });
+  } catch (error) {
+    console.error("Error listing recordings.", error);
+    return res.status(500).json({ errorMessage: "Error listing recordings" });
+  }
+});
+
+// Play a recording
+app.get("/recordings/:recordingName", async (req, res) => {
+  const { recordingName } = req.params;
+  const { range } = req.headers;
+  const exists = await azureBlobService.exists(recordingName);
+
+  if (!exists) {
+    return res.status(404).json({ errorMessage: "Recording not found" });
+  }
+
+  try {
+    // Get the recording file from Azure Blob Storage
+    const { stream, size, start, end } = await getRecordingStream(
+      recordingName,
+      range
+    );
+
+    // Set response headers
+    res.status(206);
+    res.setHeader("Cache-Control", "no-cache");
+    res.setHeader("Content-Type", "video/mp4");
+    res.setHeader("Accept-Ranges", "bytes");
+    res.setHeader("Content-Range", `bytes ${start}-${end}/${size}`);
+    res.setHeader("Content-Length", end - start + 1);
+
+    // Pipe the recording file to the response
+    stream.pipe(res).on("finish", () => res.end());
+  } catch (error) {
+    console.error("Error getting recording.", error);
+    return res.status(500).json({ errorMessage: "Error getting recording" });
+  }
+});
+
+// Delete a recording
+app.delete("/recordings/:recordingName", async (req, res) => {
+  const { recordingName } = req.params;
+  const exists = await azureBlobService.exists(recordingName);
+
+  if (!exists) {
+    return res.status(404).json({ errorMessage: "Recording not found" });
+  }
+
+  try {
+    // Delete the recording file from Azure Blob Storage
+    await Promise.all([azureBlobService.deleteObject(recordingName)]);
+    res.json({ message: "Recording deleted" });
+  } catch (error) {
+    console.error("Error deleting recording.", error);
+    res.status(500).json({ errorMessage: "Error deleting recording" });
+  }
+});
+
+// Start the server
+app.listen(SERVER_PORT, () => {
+  console.log("Server started on port:", SERVER_PORT);
+});
+
+// Helper functions
+
+const getActiveRecordingByRoom = async (roomName) => {
+  try {
+    // List all active egresses for the room
+    const egresses = await egressClient.listEgress({ roomName, active: true });
+    return egresses.length > 0 ? egresses[0].egressId : null;
+  } catch (error) {
+    console.error("Error listing egresses.", error);
+    return null;
+  }
+};
+
+const getRecordingStream = async (recordingName, range) => {
+  const size = await azureBlobService.getObjectSize(recordingName);
+
+  // Get the requested range
+  const parts = range?.replace(/bytes=/, "").split("-");
+  const start = range ? parseInt(parts[0], 10) : 0;
+  const endRange = parts[1]
+    ? parseInt(parts[1], 10)
+    : start + RECORDING_FILE_PORTION_SIZE;
+  const end = Math.min(endRange, size - 1);
+
+  const stream = await azureBlobService.getObject(recordingName, { start, end });
+  return { stream, size, start, end };
+};

advanced-features/openvidu-recording-basic-node/.env

@@ -10,5 +10,5 @@ S3_ENDPOINT=http://localhost:9000
 S3_ACCESS_KEY=minioadmin
 S3_SECRET_KEY=minioadmin
 AWS_REGION=us-east-1
-S3_BUCKET=openvidu
+S3_BUCKET=openvidu-appdata
 RECORDINGS_PATH=recordings/

advanced-features/openvidu-recording-basic-node/src/index.js

@@ -217,7 +217,7 @@ app.delete("/recordings/:recordingName", async (req, res) => {
   }
 
   try {
-    // Delete the recording file file from S3
+    // Delete the recording file from S3
     await Promise.all([s3Service.deleteObject(key)]);
     res.json({ message: "Recording deleted" });
   } catch (error) {

advanced-features/openvidu-recording-basic-node/src/s3.service.js

@@ -11,7 +11,7 @@ const S3_ENDPOINT = process.env.S3_ENDPOINT || "http://localhost:9000";
 const S3_ACCESS_KEY = process.env.S3_ACCESS_KEY || "minioadmin";
 const S3_SECRET_KEY = process.env.S3_SECRET_KEY || "minioadmin";
 const AWS_REGION = process.env.AWS_REGION || "us-east-1";
-const S3_BUCKET = process.env.S3_BUCKET || "openvidu";
+const S3_BUCKET = process.env.S3_BUCKET || "openvidu-appdata";
 
 export class S3Service {
   static instance;

ai-services/openvidu-live-captions/README.md

@@ -0,0 +1,5 @@
+# OpenVidu Captions
+
+This is the basic JavaScript tutorial extended to show live captions. It uses OpenVidu AI Services to generate captions from the audio Tracks of Participants in the Rooms.
+
+Visit [Live Captions tutorial](https://openvidu.io/latest/docs/tutorials/ai-services/openvidu-live-captions/)

ai-services/openvidu-live-captions/src/app.js

@@ -0,0 +1,221 @@
+// When running OpenVidu locally, leave these variables empty
+// For other deployment type, configure them with correct URLs depending on your deployment
+var APPLICATION_SERVER_URL = "";
+var LIVEKIT_URL = "";
+configureUrls();
+
+const LivekitClient = window.LivekitClient;
+var room;
+
+function configureUrls() {
+  // If APPLICATION_SERVER_URL is not configured, use default value from OpenVidu Local deployment
+  if (!APPLICATION_SERVER_URL) {
+    if (window.location.hostname === "localhost") {
+      APPLICATION_SERVER_URL = "http://localhost:6080/";
+    } else {
+      APPLICATION_SERVER_URL = "https://" + window.location.hostname + ":6443/";
+    }
+  }
+
+  // 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);
+      }
+    }
+  );
+
+  room.registerTextStreamHandler("lk.transcription", async (reader, participantInfo) => {
+      const message = await reader.readAll();
+      const isFinal = reader.info.attributes["lk.transcription_final"] === "true";
+      const trackId = reader.info.attributes["lk.transcribed_track_id"];
+
+      if (isFinal) {
+        const speaker = participantInfo.identity == room.localParticipant.identity
+            ? "You" : participantInfo.identity;
+        const timestamp = new Date().toLocaleTimeString();
+        const captionsTextarea = document.getElementById("captions");
+        captionsTextarea.value += `[${timestamp}] ${speaker}: ${message}\n`;
+        captionsTextarea.scrollTop = captionsTextarea.scrollHeight;
+      }
+    }
+  );
+
+  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();
+
+  // Clear the captions textarea
+  document.getElementById("captions").value = "";
+
+  // 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(APPLICATION_SERVER_URL + "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;
+}

ai-services/openvidu-live-captions/src/index.html

@@ -0,0 +1,94 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <title>OpenVidu Live Captions</title>
+        <meta charset="UTF-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1" />
+        <link rel="shortcut icon" href="resources/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@2.14.0/dist/livekit-client.umd.js"></script>
+        <script src="app.js"></script>
+    </head>
+
+    <body>
+        <header>
+            <a href="/" title="Home"><h1>OpenVidu Live Captions</h1></a>
+            <div id="links">
+                <a
+                    href="https://github.com/OpenVidu/openvidu-livekit-tutorials/tree/master/application-client/openvidu-js"
+                    title="GitHub Repository"
+                    target="_blank"
+                >
+                    <i class="fa-brands fa-github"></i>
+                </a>
+                <a
+                    href="https://livekit-tutorials.openvidu.io/tutorials/application-client/javascript/"
+                    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 id="captions-container">
+                    <textarea id="captions" class="form-control" rows="3"></textarea>
+                </div>
+            </div>
+        </main>
+
+        <footer>
+            <p class="text">Made with love by <span>OpenVidu Team</span></p>
+            <a href="http://www.openvidu.io/" target="_blank">
+                <img id="openvidu-logo" src="resources/images/openvidu_logo.png" alt="OpenVidu logo" />
+            </a>
+        </footer>
+    </body>
+</html>

ai-services/openvidu-live-captions/src/styles.css

@@ -0,0 +1,283 @@
+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;
+    }
+}
+
+#captions-container {
+    width: 100%;
+    padding: 25px;
+}
+
+textarea {
+    width: 100%;
+    min-height: 100px;
+    padding: 10px;
+}