Reestream - RTMP Multistream Demuxer

Overview

RTMP relay server that receives a single stream and forwards to multiple platforms (Twitch, Facebook, Instagram, YouTube).

Architecture

Components

• main.rs: TCP listener, connection handling, config loading
• server.rs: RTMP handshake, server session setup (low-latency config)
• client.rs: Publisher connection handling, stream forwarding to platforms
• config.rs: TOML-based configuration parsing
• provider.rs: Stream key provider abstraction (OAuth2)
• error.rs: Centralized error types

Flow

1. Listen on RTMP port (default 1945)
2. Accept publisher connection
3. Perform RTMP handshake
4. Validate stream key
5. Forward packets to all configured platforms (RTMP/RTMPS)

Configuration

config.toml

rtmp_addr = "0.0.0.0"
rtmp_port = 1945
stream_key = "your-key"

[[platform]]
url = "rtmp://live.twitch.tv/app"
key = "stream-key"
orientation = "horizontal" # or "vertical"

CLI

reestream --config config.toml

Specs

Low Latency

• Chunk size: 128 bytes
• ACK window: 256KB
• TCP_NODELAY enabled

Supported Protocols

• Input: RTMP
• Output: RTMP, RTMPS (via tokio-native-tls)

Platforms

Pre-configured for: Twitch, Facebook, Instagram, YouTube. Extensible via config.

Dependencies

• rml_rtmp: RTMP protocol
• tokio: Async runtime
• reqwest: HTTP client (OAuth2)
• toml: Config parsing