I'll help you create a React + Vite setup for ffmpeg.wasm with proper Web Worker integration.

This setup provides a complete React application with FFmpeg.wasm integration. Here's a breakdown of the key components:

1. Vite Configuration:

   • Configured for React
   • Sets required CORS headers
   • Handles Web Worker and WebAssembly properly

2. FFmpeg Worker:

   • Handles initialization and transcoding
   • Reports progress during conversion
   • Uses transferable objects for efficient data passing

3. Custom Hook (useFFmpeg):

   • Manages worker lifecycle
   • Handles state and progress
   • Provides easy-to-use transcode function

4. React Component:

   • File input handling
   • Progress display
   • Video preview and download

To use this setup:

1. Install dependencies:

npm install @ffmpeg/ffmpeg @ffmpeg/util react react-dom
npm install -D @vitejs/plugin-react vite

2. Create the files as shown in the artifact

3. Add the VideoConverter component to your app:

import VideoConverter from "./components/VideoConverter";

function App() {
  return (
    <div>
      <h1>Video Converter</h1>
      <VideoConverter />
    </div>
  );
}

4. Start the development server:

npm run dev

The setup includes:

• Progress tracking during conversion
• Error handling
• Preview of converted video
• Download option for the converted file
• Clean separation of concerns using custom hooks

Would you like me to explain any part in more detail or add additional features like:

• Support for more output formats
• Custom FFmpeg command options
• Multiple file processing
• Thumbnail generation