A NodeJS application that automatically transforms articles into complete presentations with synchronized narration audio.

• Converts articles into presentation slides with bullet points
• Generates narration scripts for each slide
• Creates audio narrations using Google Cloud Text-to-Speech
• Synchronizes slides with their corresponding narrations
• Outputs a complete presentation package ready for use

• Node.js 14.x or higher
• Google Cloud Platform account with Text-to-Speech API enabled
• Service account credentials with permissions for Text-to-Speech API

1. Clone the repository:

   git clone <repository-url>
   cd presenter-ai

2. Install dependencies:

   npm install

3. Configure Google Cloud credentials:

   • Create a service account on Google Cloud Platform
   • Download the service account key JSON file
   • Set the environment variable:

     export GOOGLE_APPLICATION_CREDENTIALS=path/to/your-service-account-key.json

   • Alternatively, create a .env file in the project root:

     GOOGLE_APPLICATION_CREDENTIALS=path/to/your-service-account-key.json
     AI_SDK_API_KEY=your_api_key_here
     

Run the example script to see the full process:

node example.js

This will:

1. Generate slide content and narration from the example article
2. Create audio files for each narration
3. Save all presentation data to presentation_data.json

const { run } = require('./presenter.js');

// Your article text
const articleText = `
# Your Article Title

Your article content goes here...
`;

// Generate the presentation
(async () => {
  try {
    const result = await run(articleText);
    console.log(`Generated presentation with ${result.length} slides.`);
  } catch (error) {
    console.error("Error:", error);
  }
})();

The script generates:

1. A folder named narrations/ containing MP3 audio files for each slide
2. A JSON file (presentation_data.json) with the complete presentation data:

   [
     {
       "slide_number": 1,
       "slide_content": "# Slide Title\n- Bullet point 1\n...",
       "narration_text": "Full narration text for this slide...",
       "narration_mp3_path": "path/to/audio/file.mp3",
       "narration_duration_seconds": 15.23
     },
     ...
   ]

You can customize the narration options:

const { generateNarrations } = require('./presenter.js');

const options = {
  batchSize: 2, // Number of parallel TTS requests
  outputDir: "custom-narrations", // Custom output directory
  voiceLanguage: "en-US", 
  voiceName: "en-US-Chirp3-HD-Puck", // Different voice model
};

const enhancedContent = await generateNarrations(synchronizedContent, options);

• @ai-sdk/google: For Google's AI models
• ai: For text generation
• zod: For schema validation
• dotenv: For environment variables
• @google-cloud/text-to-speech: For creating narration audio
• mp3-duration: For calculating audio durations

MIT