MulmoCast
MulmoCast is an AI-native multi-modal presentation tool that automatically generates videos, podcasts, slides, PDFs, and manga-style content from a single script using various AI technologies.
https://github.com/receptron/mulmocast-cli?ref=producthunt
Product Information
Updated:Jun 19, 2025
What is MulmoCast
MulmoCast is a next-generation presentation platform developed by Satoshi Nakajima, designed specifically for the AI era where humans and AI collaborate to create and share content. Unlike traditional presentation tools like PowerPoint or Keynote that were designed for human creators in the pre-AI era, MulmoCast is built from the ground up to work seamlessly with generative AI technologies that can understand and produce natural language, images, audio, and video content. At its core, MulmoCast uses MulmoScript, a JSON-based intermediate language that functions like a screenplay or web markup to define everything from narrative structure to visuals.
Key Features of MulmoCast
MulmoCast is an AI-native presentation platform that revolutionizes content creation by enabling seamless collaboration between AI and humans. It uses MulmoScript, a JSON-based intermediate language, to transform source material into multiple formats including videos, podcasts, slides, PDFs, and manga-style comics. The platform integrates with various AI models like ChatGPT and Claude for content generation, while supporting multiple languages and offering automated audio-visual content creation through simple command-line operations.
Multi-Modal Output Generation: Converts a single source script into various formats including videos, podcasts, slideshows, PDFs, and manga-style comics using AI technology
AI-Native Architecture: Built from ground up to work with generative AI models, supporting multiple AI providers including OpenAI, Google, and Anthropic
MulmoScript Format: Uses a specialized JSON-based scripting language that acts as an intermediate format for defining narrative structure, visuals, and audio elements
Automated Content Generation: Provides command-line tools for automated generation of images, audio, and complete video content with minimal human intervention
Use Cases of MulmoCast
Business Presentations: Transform business pitches and reports into engaging multi-format presentations with professional narration and visuals
Educational Content: Create educational materials in multiple formats to accommodate different learning styles and delivery methods
Content Marketing: Generate consistent marketing content across different platforms from a single source script
Children's Content Creation: Produce animated stories and educational content in Ghibli-style animation with multiple language support
Pros
Efficient multi-format content generation from a single source
Strong AI integration with multiple provider support
Automated workflow reducing manual content creation effort
Cost-effective content production (reported as under $1 per video)
Cons
Requires technical knowledge to use command-line interface
Dependent on multiple third-party API keys and services
Limited customization options compared to traditional content creation tools
How to Use MulmoCast
Install MulmoCast: Run 'npm install -g mulmocast' to install MulmoCast globally. Also install ffmpeg using 'brew install ffmpeg' on macOS or download from ffmpeg.org for other platforms.
Configure API Keys: Create a .env file in your project directory and add required API keys: OPENAI_API_KEY (required), and optionally GOOGLE_PROJECT_ID, NIJIVOICE_API_KEY, ELEVENLABS_API_KEY for additional features.
Generate MulmoScript: Run 'mulmo tool scripting -i -t [template_name] -o ./ -s story' to start interactive script generation. Choose template like 'children_book', 'ghibli_strips', etc. This will create a JSON script file.
Generate Audio: Run 'mulmo audio [script_file.json]' to generate audio files from your script. Audio files will be saved in output/audio directory.
Generate Images: Run 'mulmo images [script_file.json]' to generate images for your script. Images will be saved in output/images directory.
Create Final Video: Run 'mulmo movie [script_file.json]' to combine audio and images into a final video. Add '-c ja' flag for Japanese subtitles. The video will be saved in the output directory.
Optional: Generate Other Formats: Use 'mulmo pdf [script_file.json]' to create PDF presentations or 'mulmo translate [script_file.json]' to translate content to different languages.
Review Output: Check the output directory for your generated files. The directory structure will include /output/audio/ for audio files, /output/images/ for images, and /output/cache/ for processing files.
MulmoCast FAQs
MulmoCast is a next-generation AI-native presentation platform that enables users to create multi-modal content across different formats like videos, podcasts, slideshows, PDFs, and manga-style comics. It works with AI to transform source material into various content formats using tools like ChatGPT and Claude.
MulmoCast Video
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