Repolode
Submit
MartinDelophy

MartinDelophy/ai-video-editor

Open-source, local-first browser video editor with a multi-track timeline, in-browser AI voiceover, music, captions and repair.

Open-source alternative to:CapCutAdobe Premiere Rush

View on GitHubWebsite
Stars
860
Forks
114
Open issues
4
Last commit
yesterday

What is it?

Timeline Studio is a video editor that runs in the browser. It offers a CapCut-style multi-track timeline with picture-in-picture overlays, keyframes, captions, stickers, voiceover and music tracks, and exports MP4 or WebM through WebCodecs with a MediaRecorder fallback. Project files are saved as portable .timeline archives.

The editor runs AI features locally in the browser using WebGPU and WASM, including text-to-speech voiceovers, Stable Audio music generation, Whisper automatic captions, MI-GAN watermark removal, NanoVSR 4x upscaling, vocal separation, and JoyVASA/LivePortrait talking-avatar generation. Large models are lazy-loaded and cached, and model files are mirrored on Hugging Face and ModelScope.

The project also includes an agent skill and a headless command runner that let coding agents such as Codex or Claude Code inspect, validate and edit `.timeline` projects with declarative JSON plans.

Key features

  • 01Multi-track timeline with picture-in-picture overlays, keyframes, masks and color grading.
  • 02Local AI voiceover in Chinese, English and several European languages.
  • 03Automatic captions with Whisper and AI music generation with Stable Audio.
  • 04Watermark removal and 4x video restoration with before/after comparison.
  • 05Portable .timeline project files and offline MP4/WebM export.
  • 06Headless CLI and agent skill for inspecting and editing projects.

Use cases

  • Editing short videos in the browser without uploading media to a backend.
  • Adding AI voiceovers and automatic captions to talking-head or tutorial videos.
  • Removing watermarks or upscaling low-resolution footage locally.
  • Letting a coding agent produce or modify editable timeline projects.

Quick start

  1. 1

    Install the agent Skill via skills.sh

    npx skills add MartinDelophy/ai-video-editor --skill edit-timeline-studio
  2. 2

    Inspect a portable project file with the headless command runner

    npm run agent -- project.inspect /absolute/path/project.timeline

Things to know

  • The README's main quick path is the hosted browser editor, not a local install command.
  • Local AI features depend on the Anna container's capabilities for the Anna edition.
  • Browser AI models are large and downloaded on demand, which may take time and storage.
  • Usage is restricted by a deep-synthesis responsibility policy requiring lawful authorization for facial content.

Topics

#video-editor#webgpu#webcodecs#browser-ai#text-to-speech#automatic-captions#onnx#react#agent-skills#ai-music

FAQ

What is ai-video-editor?
Open-source, local-first browser video editor with a multi-track timeline, in-browser AI voiceover, music, captions and repair. Timeline Studio is a video editor that runs in the browser. It offers a CapCut-style multi-track timeline with picture-in-picture overlays, keyframes, captions, stickers, voiceover and music tracks, and exports MP4 or WebM through WebCodecs with a MediaRecorder fallback. Project files are saved as portable .timeline archives.
Is ai-video-editor free to use? What license does it have?
ai-video-editor is open source under the MIT license. Check the license terms before using it in commercial products.
Is ai-video-editor still maintained?
Actively maintained. The last commit to ai-video-editor was on Oct 19, 2026.
What can I use ai-video-editor for?
Editing short videos in the browser without uploading media to a backend. Adding AI voiceovers and automatic captions to talking-head or tutorial videos. Removing watermarks or upscaling low-resolution footage locally. Letting a coding agent produce or modify editable timeline projects.
How do I install ai-video-editor?
Install the agent Skill via skills.sh: npx skills add MartinDelophy/ai-video-editor --skill edit-timeline-studio Inspect a portable project file with the headless command runner: npm run agent -- project.inspect /absolute/path/project.timeline
Where can I get ai-video-editor?
The source code and installation instructions are on GitHub: https://github.com/MartinDelophy/ai-video-editor

Summary generated by AI from the project's README. GitHub stats refresh daily.

Related projects