Multimedia Broadcasting SaaS with Cross-Platform Support -- 2

SaaS Audio Broadcasting Web Application (with Linux/Windows/Raspberry Pi Players)
Project Overview

We need a multi-tenant SaaS platform for audio broadcasting with cross-platform player support (Linux, Windows, Raspberry Pi). The system should allow centralized scheduling, monitoring, and broadcasting of audio to distributed clients.

Core Features
1. User & Tenant Management

Multi-tenant setup with role-based access (Owner/Admin/Operator/Viewer).

Secure login, email verification, 2FA, password reset.

Subscription management with Razorpay (India) + Stripe (global).

2. Player Management

Enroll players via token/QR.

Real-time status (online/offline, last seen, IP, health metrics).

Grouping by location/zone.

Remote actions (reboot, volume, logs).

3. Scheduling & Playback

One-time and recurring schedules (daily/weekly/monthly/yearly).

Playlists (shuffle, sequential, random).

Priority/emergency overrides with pre-emption.

Volume control, fade in/out, and blackout windows.

4. Broadcast Modes

Synchronized playback across all players.

Group/zone-based broadcasting.

Emergency alert with highest priority.

Optional: live mic/line-in relay (low latency).

5. Media Library

Upload/manage audio files (mp3/wav/aac).

Tagging, search, folders.

Safe deletion (no broken schedules).

Optional: Text-to-Speech for announcements.

6. Logs & Analytics

Playback history and success/failure logs.

Real-time dashboards (uptime, latency, jitter).

Alerts (email/SMS/webhooks).

Export reports (CSV/PDF).

7. Player/Agent

Lightweight agent for Linux, Windows, Raspberry Pi.

Playback via VLC/GStreamer.

Offline resilience (cache schedules + media).

Auto-update/OTA support with rollback.

Heartbeat, playback confirmations, error reporting.

Tech Preferences

Backend: Python (Flask/FastAPI) or Node.js (NestJS).

Database: PostgreSQL + Redis (cache).

Broker: MQTT/WebSockets.

Media: FFmpeg + VLC/GStreamer.

Storage: S3-compatible (MinIO/AWS S3).

Deployment: Docker (Kubernetes-ready).

Monitoring: Grafana/Prometheus.

Deliverables

Web application (multi-tenant SaaS).

Player agents (Linux, Windows, Raspberry Pi).

Media library & scheduler.

Subscription & billing integration.

Analytics & monitoring dashboards.

Documentation & deployment guide.

Milestones

Design & Architecture (UI/UX wireframes, architecture docs).

Core Platform (auth, tenant management, media library).

Player Agent Development (Linux/RPi, Windows installer).

Scheduling & Broadcasting Features.

Billing, Logs & Alerts.

Testing, Documentation & Deployment.

Acceptance Criteria

≥95% devices play scheduled audio within ±1.5s sync.

Emergency alerts pre-empt current playback within 2s.

Offline players auto-sync once online.

Billing and plan limits enforced correctly.

Agents support auto-update & rollback.

Proposal Requirements

Tech stack choice & rationale.

Timeline with milestone estimates.

Relevant past project links/demos.

Post-launch support & maintenance plan.