Gryt SFU

Selective Forwarding Unit for the Gryt voice & video platform.
High-performance Go media server built with Pion WebRTC.
Forwards audio, camera, and screen-share tracks with RTCP relay and VP9 preference.

Docker

docker pull ghcr.io/gryt-chat/sfu:latest
docker run -p 5005:5005 -p 443:443/udp -p 10000-10019:10000-10019/udp --env-file .env ghcr.io/gryt-chat/sfu:latest

Browse tags at ghcr.io/gryt-chat/sfu.

Quick Start (development)

cp env.example .env
go run ./cmd/sfu

Starts on http://localhost:5005.

Configuration

See env.example for all options. Key variables:

Variable	Default	Description
PORT	5005	HTTP/WebSocket port
STUN_SERVERS	stun:stun.l.google.com:19302	Comma-separated STUN servers
ICE_UDP_MUX_PORT	—	Enable ICE UDP mux on a single UDP port (e.g. 443)
ICE_UDP_PORT_MIN	—	Min UDP port for WebRTC media
ICE_UDP_PORT_MAX	—	Max UDP port for WebRTC media
ICE_ADVERTISE_IP	—	Advertised IP for NAT traversal

Documentation

Full docs at docs.gryt.chat/docs/sfu:

• SFU Overview — architecture, track management, connection states
• Voice Debugging — troubleshooting audio issues
• Deployment — Docker Compose, Kubernetes

Issues

Please report bugs and request features in the main Gryt repository.

License

AGPL-3.0 — Part of Gryt