Course Outline
Handling Media Devices
1. Browser Permissions with navigator.permissions
- Accessing hardware:
- Webcam
- Microphone
- Optional permissions:
- Geolocation
- Notifications
- Clipboard (read/write)
- Querying permission status
- Limitations and browser compatibility
2. Reading Media Devices with navigator.mediaDevices
- Enumerating devices
- Managing device changes
3. Cross-browser Compatibility
- API usage:
- navigator.permissions.query()
- navigator.mediaDevices.enumerateDevices()
- getUserMedia()
- Strategies for Safari fallback
4. Managing Media Devices
- Device initialization: getUserMedia(constraints)
- Understanding media device constraints
- Starting and stopping media streams
- Handling device changes
5. Recording Devices with MediaRecorder
- Starting/stopping streaming and recording
- Downloading .webm files
- Real-time waveform previews
Optional Add-ons:
- Saving 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
- Complete signaling flow
2. Video Chat via WebRTC
- Architecture: Node.js + ws
- WebRTC client: RTCPeerConnection
- Local E2E testing
Optional Features:
- Call hang-up (closing connection, stopping media)
- Group calling (multi-user rooms)
- Token-based simple authentication
3. Screen Sharing
- Utilizing 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
- Interpreting stats
- Live bitrate/jitter charts
- Quality adaptation strategies
6. All of the topic are
- Hands-on use-case
Requirements
This course is well-suited for frontend and full-stack developers, technical architects, and engineers who are developing browser-based real-time communication features such as video chat, screen sharing, or audio streaming. Participants are expected to have a solid working knowledge of JavaScript and web technologies, with prior experience in Node.js and WebSocket-based communication being advantageous but not mandatory.
Testimonials (3)
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
Hands-on, exercises, in-person helping and questioning.
Jose Paulos - INESC TEC
Course - Tailwind CSS
That every technical lesson came with multiple practical exercises to nail down the concepts.
