WebRTC: Building Real-time Video Communication

WebRTC: Building Real-time Video Communication

What is WebRTC? WebRTC (Web Real-Time Communication) enables peer-to-peer audio, video, and data communication directly between browsers.

Core Components 1. **MediaStream API**: Access to user's camera and microphone 2. **RTCPeerConnection**: Manages the peer connection 3. **RTCDataChannel**: Send arbitrary data between peers

Connection Flow 1. Signaling: Establish connection between peers 2. STUN/TURN: Traverse NAT and firewalls 3. ICE Candidates: Exchange connection information 4. SDP (Session Description Protocol): Negotiate media

Building a Video Chat Application ```javascript // Get user media const stream = await navigator.mediaDevices.getUserMedia({ video: true, audio: true });

// Create peer connection const peerConnection = new RTCPeerConnection();

// Add tracks stream.getTracks().forEach(track => { peerConnection.addTrack(track, stream); }); ```

Scalability Considerations - Media server setup (Kurento, Janus, Mediasoup) - Recording and transcoding - Bandwidth optimization - Network quality adaptation