Complete overview of all system features, organized by module.

Modules

Module	What it does	Language	Platform
Backend API	REST + WebSocket server	TypeScript / Node.js	Debian 12
Control Room UI	Operator panel	Vue.js 3	Browser (nginx)
Flutter App	iPad video player	Dart / Flutter	iPadOS
License Key	HMAC key generation	TypeScript / Node.js	Isolated Mac
Deploy	Provisioning + deploy	Bash	Mac → Server

The modules in detail

Backend API (zerolatency-live-player-api)

Fastify + WebSocket API module on port 3002, the only backend of the system. It manages devices (iPads), streaming links, events and the license, with MongoDB as the database and Swagger UI at /docs.

→ See Backend API

Control Room UI (zerolatency-live-player-regia)

Standalone Vue 3 control room interface, operator dashboard: create/activate/block links, monitor devices and manage streams in real time via WebSocket.

→ See Control Room UI

Flutter App (zerolatency-live-player-app)

DVR/HLS player for iPad tablets with multi-slot support (MAIN/FEED/ALT) and real-time WebSocket. Based on VLCKit (MobileVLCKit) with a custom native VLC player (MethodChannel + direct VLCKit).

→ See Flutter App

License Key (zerolatency-live-player-keygen)

Standalone CLI tool to generate HMAC-SHA256 signed license keys, kept separate from the backend for security: only authorized staff should be able to generate valid keys. The backend only handles validation.

→ See License Keygen

Deploy (zerolatency-live-player-deploy)

Remote provisioning and deploy scripts for Debian 12 servers, multi-tenant: the same script deploys to multiple stadiums/servers (targets) selectable via targets.conf, with nginx, PM2, MongoDB and automatic backups.

→ See Deploy Module

Where to go next

If you want to…	Go to…
Understand the features in detail	Features
Prepare the first deploy	Pre-deploy
Generate a license key	Generate License Key
Distribute the app to iPads	MDM Setup
Configure the Apple Developer account	Complete Guide