Course Outline
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
2. Reading Media Devices with navigator.mediaDevices
- Device enumeration
- Handling device changes
3. Cross-browser Compatibility
- API usage:
- navigator.permissions.query()
- navigator.mediaDevices.enumerateDevices()
- getUserMedia()
- Safari fallback strategy
4. Media Device Handling
- Device initialization: getUserMedia(constraints)
- Media device constraints
- Starting and stopping media streams
- Handling device changes
5. Recording Devices with MediaRecorder
- Start/stop streaming and recording
- Download .webm file
- Real-time waveform preview
Optional Add-ons:
- Save in .wav format using ScriptProcessorNode
- Audio FFT spectrum visualization
- Volume bar in decibels
- Voice recognition with webkitSpeechRecognition
Peer Connection
1. Signaling Servers
- Bidirectional channel options:
- WebSocket
- Socket.io
- SignalR
- Message structure
- Simplified WebRTC client
- Full signaling flow
2. Video Chat via WebRTC
- Architecture: Node.js + ws
- WebRTC client: RTCPeerConnection
- Local E2E testing
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
4. Session Description Protocol (SDP)
- Introduction and contents
- Reading and interpreting SDP
- Codecs:
- Audio & Video
- Negotiation and control
- Fallback strategies
5. WebRTC Statistics with getStats()
- Types of statistics
- How to interpret stats
- Live bitrate/jitter charts
- Quality adaptation strategies
6. All of the topic are
- Hands-on use-case
Requirements
This course is ideal for frontend and full-stack developers, technical architects, and engineers building browser-based real-time communication features like video chat, screen sharing, or audio streaming. Participants should have a working knowledge of JavaScript and web technologies, with optional experience in Node.js and WebSocket-based communication.
Testimonials (2)
I really enjoyed learning about AI attacks and the tools out there to begin practicing and actively using for security testing. I took a lot of knowledge away which I didn't have at the beginning and the course met what I hoped it would be. My favorite part shown from the training was Comet Browser and was amazed at what it could do. Definitely something will be looking into more. Overall it was a great course and enjoyed learning all OWASP GenAI Top 10.
Patrick Collins - Optum
Course - OWASP GenAI Security
That every technical lesson came with multiple practical exercises to nail down the concepts.
