RCWeb Video Chat App

The RCWeb Video Chat App (app/chat-rtc) is a multi-user video chat room for the RCWeb ecosystem. It follows the Symmetric Pattern: everyone opens the same app in the same room, RCWeb distributes signaling messages, and each browser sends audio and video directly to the other browsers with WebRTC.

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What it does

• Multi-user room video chat: Each participant can join the same room URL and appear in a responsive video grid.
• Direct browser-to-browser media: The app uses WebRTC peer connections for audio and video, so RCWeb is only used for signaling.
• Per-user device controls: Everyone can choose a display name, mute or unmute their microphone, and turn their camera on or off.
• Room presence: Participants automatically discover each other inside the room and clean up tiles when someone leaves.

How it works

• RCWeb signaling: script.js uses rc.sendFunctionCall(...) to broadcast presence, request the current room roster, and exchange WebRTC offers, answers, and ICE candidates.
• Mesh topology: Each browser creates one RTCPeerConnection per remote participant, producing a simple peer-to-peer mesh that works well for smaller group calls.
• Perfect-negotiation style handling: The signaling code guards against offer collisions so multiple peers can join and renegotiate safely.
• Live media state: Camera and microphone state are reflected in the UI and shared with peers as lightweight presence metadata.

Notes

• Browser camera and microphone access typically requires HTTPS or localhost.
• The app includes public STUN servers for ICE discovery, but it does not include a TURN relay. Very restrictive networks may still need extra infrastructure for every participant to connect reliably.

Launch RCWeb App