WebRTC & Sync Engine Architecture

🏗️ WebRTC & Sync Engine Architecture

This document provides a technical breakdown of MovieNight's peer-to-peer media pipeline, SDP munging engine, and sub-second drift synchronization.

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1. Decentralized Mesh Topology

MovieNight uses a decentralized mesh network:

• Signaling: Conducted through PeerJS public broker servers to perform ICE candidate gathering and SDP exchange.
• Data Channels: Reliable RTCDataChannel connections are maintained between all participants for room state, chat messages, and sync heartbeats.
• Media Tracks: Presenters broadcast SRTP encrypted video and audio streams directly to connected peers.

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2. 1080p Stream Quality Pipeline

Standard browser WebRTC drops streaming quality to 360p or 480p to conserve bandwidth. MovieNight prevents this through custom SDP munging: