EchoView

EchoView is a cross-platform Flutter app for real-time camera video streaming between devices on the same Wi-Fi network, with no internet required. It uses WebRTC for peer-to-peer streaming and local network discovery, ensuring all data stays within your LAN for privacy and speed.

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🚀 Features

• Local-Only Streaming: Real-time, low-latency video streaming over your Wi-Fi network.
• No Internet Needed: Works even if your router has no internet connection.
• Peer-to-Peer (WebRTC): Direct device-to-device video transmission.
• Offline Signaling: Uses local HTTP server and mDNS for device discovery and connection setup.
• Multiple Clients: One server (broadcaster) can stream to multiple viewers simultaneously.
• Simple Roles:
  • Server: Broadcasts camera feed.
  • Client: Discovers and views available streams.
• Privacy First: No external servers, no cloud, no paid third-party services.
• Cross-Platform: Runs on Android and iOS (Flutter).

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📱 How It Works

1. Choose Mode: On launch, select Server (broadcast) or Client (view).
2. Server Mode:
   • Select camera (front/back) and quality.
   • Start broadcasting your camera feed.
   • App advertises itself on the local network.
3. Client Mode:
   • App automatically discovers available servers on the same Wi-Fi.
   • Select a server to view its live video stream.

All communication and video stay within your local network.

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🛠️ Tech Stack

• Flutter (cross-platform UI)
• WebRTC (flutter_webrtc plugin)
• mDNS/Bonjour (LAN device discovery)
• Local HTTP Server (signaling)
• Provider (state management)

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📦 Getting Started

Prerequisites

• Flutter SDK (latest stable)
• Android Studio or Xcode (for device/simulator)
• Devices connected to the same Wi-Fi network

Installation

1. Clone the repo:

   git clone https://github.com/yourusername/EchoView.git
   cd EchoView

2. Install dependencies:

   flutter pub get

3. Run on device:

   flutter run -d <device_id>

   (Use flutter devices to list available devices)

iOS Notes

• Requires macOS and Xcode.
• Run cd ios && pod install if building for iOS.
• Ensure camera and local network permissions are enabled in ios/Runner/Info.plist.

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🧩 Project Structure

lib/
  models/         # Data models (camera, peer state, etc.)
  providers/      # State management
  screens/        # UI screens (server, client, viewer)
  services/       # Camera, WebRTC, signaling, discovery
  theme/          # App theming
  widgets/        # Reusable UI components

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🔒 Privacy & Security

• No data leaves your local network.
• No external servers or cloud services used.
• Works offline and respects user privacy.

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📄 License

This project is licensed under the MIT License. See LICENSE for details.

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🙏 Acknowledgements

• flutter_webrtc
• camera
• shelf
• uuid

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💡 Contributing

Pull requests are welcome! For major changes, please open an issue first to discuss what you would like to change.

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📬 Contact

For questions or support, open an issue or contact the maintainer at gopal.joshi73@hotmail.com.