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GridCast

GridCast is a macOS Electron application that allows users to play multiple M3U8 streams and MP4 files in a dynamic 2x2 grid layout. Built with Electron.js, MPV, and HLS.js, it provides a seamless way to load, manage, and persist playlists for multiple video streams.

After the application opens up

Adding a m3u8 URL or MP4

When 4 Live Streams are running

Features

✅ 2x2 Grid Layout – Four independent video players
✅ MPV & HLS.js Integration – Supports M3U8 streams & MP4 playback
✅ Stream Loading – Load M3U8 URLs or upload MP4 files
✅ Persistent Playlists – Playlists are saved & restored on launch
✅ Hover-Based UI – Controls appear only when needed
✅ Error Handling – Alerts users for failed streams
✅ Minimal UI Design – Clean and auto-hiding interface

File Structure

/gridcast
│── /src
│   │── main.js               # Electron main process
│   │── preload.js            # Secure preload script for UI functions
│   │── playerManager.js      # Handles video playback
│   │── playlistManager.js    # Manages playlists
│   │── storageManager.js     # Handles persistent storage
│   │── uiManager.js          # UI interactions and modals
│   │── eventHandlers.js      # User input events
│── /assets
│   │── style.css             # UI styles
│── /views
│   │── index.html            # App UI
│── package.json              # Project metadata
│── package-lock.json         # Dependencies
│── .github/workflows/        # GitHub Actions CI/CD workflow
│── dist/                     # Built `.dmg` files
│── localStorage.json         # Persistent playlists

Installation

Download the App

  1. Navigate to the Releases section on GitHub.
  2. Download the latest GridCast.dmg for your macOS architecture (x64 or arm64).
  3. Open the .dmg file and drag GridCast into your Applications folder.

Usage

  1. Launch the App – Open GridCast from the Applications folder.
  2. Load a Stream – Click on a video player to input an M3U8 URL or upload an MP4 file.
  3. Manage Playlists:
    • Click "Add to Playlist" after loading a stream.
    • View the playlist by hovering over the video player.
    • Click a playlist item to switch streams.
    • Remove a playlist item by clicking the "Remove" button.
  4. Auto-Save & Restore – Playlists are saved and will load when the app is restarted.

Development Setup

1. Clone the Repository

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

Install Dependencies

npm install

Run the App Locally

npm start

Build for macOS

npm run build:macos

Dependencies

  • Electron.js – Desktop application framework
  • MPV.js – Video player integration
  • HLS.js – M3U8 stream support
  • electron-builder – Packaging and distribution
  • electron-packager – App bundling

Contributing

  • Fork the repository and create a new branch.
  • Make your changes and commit them.
  • Submit a pull request.

License

📜 Licensed under the

Author