This two-day WebRTC training offers a practical, step-by-step journey into the world of real-time browser-based communication. Starting with the foundations of media device access, participants will learn how to securely and effectively manage cameras, microphones, and permissions across different browsers. As the course progresses, they will dive into core WebRTC concepts like peer-to-peer video calling, signaling, and session negotiation, building working solutions with tools like WebSocket and RTCPeerConnection. Along the way, hands-on use cases guide learners through recording, screen sharing, and real-time audio/video analysis. By the end, attendees will understand how to architect and implement WebRTC-powered applications that are both robust and production-ready.
- Gain practical experience with media device handling, browser permissions, and cross-browser compatibility using navigator.mediaDevices and getUserMedia.
- Learn to build peer-to-peer video communication systems with WebRTC and signaling protocols like WebSocket and Socket.IO
- Implement media stream recording, waveform previews, screen sharing, and real-time audio/video statistics tracking.
- Explore advanced topics like SDP negotiation, codec selection, live bitrate monitoring, and dynamic quality adaptation.
- Perfect for developers looking to integrate modern, browser-based communication features into real-world applications.
Day 1 – Media Devices Handling
1. Browser Permissions with navigator.permissions
- Accessing hardware:
- Webcam
- Microphone
- Optional permissions:
- Geolocation
- Notifications
- Clipboard (read/write)
- Permission querying and status
- Limitations and browser compatibility
- Hands-on use-case
2. Reading Media Devices with navigator.mediaDevices
- Device enumeration
- Handling device changes
- Hands-on use-case
3. Cross-browser Compatibility
- API usage:
- navigator.permissions.query()
- navigator.mediaDevices.enumerateDevices()
- getUserMedia()
- Safari fallback strategy
- Hands-on use-case
4. Media Device Handling
- Device initialization: getUserMedia(constraints)
- Media device constraints
- Starting and stopping media streams
- Handling device changes
- Hands-on use-case
5. Recording Devices with MediaRecorder
- Start/stop streaming and recording
- Download .webm file
- Real-time waveform preview
- Hands-on use-case
Optional Add-ons:
- Save in .wav format using ScriptProcessorNode
- Audio FFT spectrum visualization
- Volume bar in decibels
- Voice recognition with webkitSpeechRecognition
Day 2 – Peer Connection
1. Signaling Servers
- Bidirectional channel options:
- WebSocket
- Socket.io
- SignalR
- Message structure
- Simplified WebRTC client
- Full signaling flow
- Hands-on use-case
2. Video Chat via WebRTC
- Architecture: Node.js + ws
- WebRTC client: RTCPeerConnection
- Local E2E testing
- Hands-on use-case
Optional Features:
- Call hang-up (close connection, stop media)
- Group calling (multi-user rooms)
- Token-based simple authentication
3. Screen Sharing
- Use of getDisplayMedia()
- Architecture and options
- Hands-on use-case
4. Session Description Protocol (SDP)
- Introduction and contents
- Reading and interpreting SDP
- Codecs:
- Audio & Video
- Negotiation and control
- Fallback strategies
- Hands-on use-case
5. WebRTC Statistics with getStats()
- Types of statistics
- How to interpret stats
- Live bitrate/jitter charts
- Quality adaptation strategies
- Hands-on use-case