NarratoAI

NarratoAI is an open-source tool that uses large language models to automatically write commentary scripts for videos and edit the footage to match — turning hours of manual narration work into a one-click pipeline. It is built for the hugely popular genre of movie and TV commentary videos, where a narrator explains and reacts to a film over edited clips.

Overview

The workflow is end-to-end: NarratoAI analyzes your source video, drafts an engaging narration script with an LLM, generates the voiceover, and cuts the video so the visuals line up with the commentary, complete with subtitles. A friendly web interface guides the process, and the underlying pipeline leans on MoviePy for video processing. The project has grown to more than 11,400 GitHub stars and is actively maintained, with updates in October 2026. It is released under the MIT license, and its official site at narratoai.cn offers documentation and downloads for getting started. While the interface is geared to Chinese-speaking creators, the underlying automation applies to commentary video production generally.

Key Features

• Automatic commentary scriptwriting powered by large language models
• One-click video editing that matches clips to the narration
• AI voiceover generation synchronized with the edited footage
• Automatic subtitle generation and placement
• Simple web UI that hides the underlying MoviePy pipeline
• MIT-licensed and free to run locally with your own model keys

💳 Pricing

NarratoAI is free and open source under the MIT license. You only pay for the LLM and text-to-speech API calls you configure.

Who Is It For

Short-video creators, film-commentary channels, and social media teams who want to produce narrated, edited videos at far higher volume.