Concat: A Local-First, Open-Source CapCut Alternative with MCP Support
GitHub Open Source
Edit videos locally with a free open-source CapCut alternative featuring a native Rust engine and MCP server.
Repository snapshot
- Repository: jub0t/Concat
- Language: Rust
- License: AGPL-3.0
- Stars: 14 124
- Forks: 1 748
Daily open-source picks: GitHub Open Source on Telegram
What it is
Concat is a free, open-source video editor built in Rust as a local-first alternative to popular web-based and subscription tools. It provides multi-track editing, keyframes, auto-captions via Whisper, background removal, and a GPU-accelerated compositor that renders previews live. Rather than relying on cloud servers, the entire application runs locally on your desktop or mobile device, keeping your raw files entirely on disk.
Why it matters
Most modern video editing tools force users into cloud uploads, opaque subscription tiers, or restrictive export limits. Concat removes these constraints by bringing the full editing pipeline into a self-hosted desktop environment. Furthermore, it bridges traditional video editing with modern developer tooling by exposing a JSON-RPC API and an MCP server, allowing scripts and AI assistants to programmatically manage timelines and cuts.
Key features
- Run local Whisper auto-captions and voice cloning offline
- Composit GPU effects and transitions live in the preview
- Drive editing workflows via a built-in MCP server for AI agents
- Animate parameters with a built-in curve editor and keyframes
- Export to H.264, HEVC, and AV1 up to 4K 60fps in 10-bit color
Quick start
To build and run Concat from source, ensure you have Rust 1.93+ and the FFmpeg development libraries installed, then run:
cd src
cargo run -p concatWho should try it
Developers, content creators, and automation engineers who want a capable video editor that runs entirely offline and can be scripted programmatically will find Concat worth evaluating.
Verdict
Concat is a compelling option for anyone seeking an open-source, local-first video editor. While it remains in beta and has minor rough edges, its scriptability and lack of artificial paywalls make it a strong daily driver.
Continue exploring
Get the next pick in Telegram: Follow GitHub Open Source
Curated from the repository README and metadata. No hands-on test is claimed; evaluate it in a sandbox before production use.