Timeline Studio is an innovative local-first AI video editor designed to operate seamlessly within a browser environment. It offers a versatile multi-track timeline akin to CapCut, integrated with advanced AI features such as voiceovers, automatic captions, vision tools, and dynamic talking avatars to create high-quality video content. With deterministic offline export capabilities, users can polish their projects without relying on cloud services.

Key Features

• Multilingual Voiceovers: Supports a variety of languages including Chinese, English, German, Spanish, French, Italian, and Brazilian Portuguese through advanced voice synthesis.
• Automatic Captions: Automatically generate precise captions using Whisper ONNX with enhanced timing and language recognition.
• Smart Framing: Employs cutting-edge subject detection and portrait matting technology for intelligent cropping and background removal.
• AI Vocal Separation: Isolate vocals while placing instrumental tracks without leaving the browser interface.
• Digital Human Generation: Leverage audio-to-motion rendering techniques for realistic talking avatars in videos.
• Local-First Inference: Entirely local processing ensures privacy as no project media is uploaded to external servers.

Editing and Exporting

• User-friendly editing interface featuring a primary visuals track alongside timed overlays.
• Comprehensive editing tools for canvas manipulation, proportions, resizing, rotating, masking, applying filters, animations, speed control, and keyframe adjustments.
• Offers independent tracks for captions, stickers, voiceovers, and music to streamline your editing process.
• Advanced project management functionalities like snapping, alignment guides, clip menus, undo/redo, and portable .timeline files.
• Exports using WebCodecs for MP4/WebM formats, ensuring high-fidelity mixing of audio, captions, and overlays.
• Installable as a Progressive Web App (PWA) for a responsive experience with a cached application shell and multilingual user interface.

Agent Skill

In addition, the repository features edit-timeline-studio, a Codex-compatible Skill that aids in planning and executing video edits. This includes:

• Inspecting media and preserving the editing brief.
• Describing reversible edits with stable identifiers.
• Operating the editor from the browser with validation capabilities.

Getting Started

To begin using Timeline Studio, Node.js version 20+ and a modern Chromium browser are recommended. Follow the provided setup instructions to get up and running quickly.