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 Duration 14 hours

Course Outline

Handling Media Devices

Browser Permissions via navigator.permissions

  • Hardware Access:
    • Webcam
    • Microphone
  • Discretionary Permissions:
    • Geolocation
    • Notifications
    • Clipboard (read/write)
  • Querying permissions and checking status
  • Constraints and browser compatibility

Accessing Media Devices using navigator.mediaDevices

  • Listing available devices
  • Managing dynamic device changes

Cross-Browser Compatibility

  • API Implementation:
    • navigator.permissions.query()
    • navigator.mediaDevices.enumerateDevices()
    • getUserMedia()
  • Strategies for Safari fallbacks

Managing Media Devices

  • Device initialization: getUserMedia(constraints)
  • Applying media device constraints
  • Controlling media stream initiation and termination
  • Responding to device changes

Recording with MediaRecorder

  • Managing stream and recording start/stop cycles
  • Downloading .webm files
  • Generating real-time waveform previews

Optional Extensions:

  • Exporting audio in .wav format using ScriptProcessorNode
  • Visualizing Audio FFT spectra
  • Displaying volume levels in decibels
  • Implementing voice recognition via webkitSpeechRecognition

Peer Connections

Signaling Servers

  • Bidirectional channel alternatives:
    • WebSocket
    • Socket.io
    • SignalR
  • Structuring messages
  • Simplifying the WebRTC client
  • Complete signaling workflows

Video Chat using WebRTC

  • Architecture: Node.js + ws
  • WebRTC client implementation: RTCPeerConnection
  • Local end-to-end testing

Optional Capabilities:

  • Terminating calls (closing connections, stopping media)
  • Group conferencing (multi-user rooms)
  • Basic token-based authentication

Screen Sharing

  • Implementing getDisplayMedia()
  • Architectural considerations and options

Session Description Protocol (SDP)

  • Overview and components
  • Parsing and interpreting SDP
  • Codecs:
    • Audio & Video
    • Negotiation and management
    • Fallback mechanisms

WebRTC Statistics using getStats()

  • Categories of statistics
  • Interpreting statistical data
  • Live bitrate/jitter visualization
  • Strategies for quality adaptation

Covering All Topics

  • Practical use-case implementation

Requirements

This program is tailored for front-end and full-stack developers, technical architects, and engineers focusing on browser-based real-time features such as video conferencing, screen sharing, or audio streaming. Candidates are expected to possess a solid grasp of JavaScript and web technologies, with familiarity in Node.js and WebSocket-based interactions serving as a beneficial advantage.

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