Metal Gear Speed Games Zero-Latency Restream Service

Custom SRT Streaming, with WebRTC Multi-view

Project Overview

This platform is a custom-built, peer-to-peer streaming environment designed to solve the delay issues, feed drops, and the overall finicky hassle of loading RTMP streams into OBS. By bypassing traditional RTMP protocols and utilizing a direct SRT to WebRTC pipeline, this platform delivers 1080p video feeds from 4 simultaneous broadcasters with sub-second latency. It serves as a real-time "green room" for live commentators to view gameplay instantly and restream to public platforms.

The Technology Stack

Docker Containerization

The entire infrastructure is defined as code. MediaMTX and Nginx run in isolated, highly optimized containers, allowing the server to be wiped and rebuilt from a GitLab repository in seconds.

MediaMTX & SRT Protocol

Broadcasters connect to the server using SRT (Secure Reliable Transport) via OBS. This ensures maximum packet delivery and high-quality H264 video ingest with minimal overhead.

FFmpeg Transcoding

A custom backend script utilizes FFmpeg to intercept the SRT feeds, bypass the video to save CPU cycles, and seamlessly transcode standard AAC audio into the WebRTC-required Opus format on the fly.

Nginx & HTTPS Security

Nginx routes WebSocket traffic, handles API cross-origin requests, and protects the live feeds with HTTP Basic Authentication. However the web pages utilize HTTPS so we have that sweet, sweet padlock.

Beautiful Frontend For Your Viewing Pleasure

The client-side UI is built with lightweight, vanilla JavaScript to maximize browser performance. Instead of brute-forcing video connections, the frontend dynamically queries the MediaMTX internal API.

API Integration: The UI polls the server's path list to determine which OBS instances are actively transmitting data.
Graceful Degradation: If a streamer drops, the UI instantly detects the API change, destroys the iframe to save client CPU, and smoothly transitions to a fallback background image.
Grid Architecture: CSS Grid layouts accommodate both a 4-player split-screen, with options for isolated single-player viewing modes, toggled seamlessly without reloading the page.

Author

KingofTheBeez: Core development, UI layout, and infrastructure deployment.

Credits & Acknowledgments

Carigs: Codebase portability optimization for public release, suggestions and ideas. The goat.
MGSG Community: For testing and QA. This was built for them!

Built With

This low latency streaming environment stands on the shoulders of giants. A massive thank you to the developers and maintainers of the incredibly powerful open-source tools and protocols that make this possible:

Secure Reliable Transport (SRT): Originally developed by Haivision. Used for the video ingestion.
WebRTC: Open-sourced by Google. Used for the peer-to-peer delivery.
FFmpeg: Created by Fabrice Bellard. Used for converting the audio from AAC to Opus.
Nginx: Created by Igor Sysoev. Used for routing, reverse proxying, and clean URLs.
Docker: Created by Solomon Hykes. Used for containerizing the entire environment.
Let's Encrypt & Certbot: Provided by the ISRG and EFF. Used for automated SSL integration.