Concat is a local CapCut alternative with an MCP server, so an agent can cut your video
Concat is pitched as a free CapCut replacement, and its listed features include auto-captions, text-to-speech, background removal, keyframes, multi-track cutting, 4K export. For developers, the more important line is further down. Concat ships an MCP server built in, so an AI agent can edit video with it, plus a JSON-RPC API for scripts. A video editor that an agent can drive, running entirely on…
Concat is described as a free video editing alternative to CapCut, offering features like auto-captions, text-to-speech, background removal, keyframes, multi-track cutting, and 4K export. For developers, it includes an MCP server and a JSON-RPC API, enabling AI agents to edit videos locally. The editor is available on macOS, Windows, Linux, and Android, with iPhone and iPad sideloaded builds.
It runs on a native Rust engine with a GPU compositor, and is licensed under AGPL-3.0. The software provides no watermark, account, subscription, or upload features, and utilizes local Whisper for captions and free local text-to-speech or voice cloning for audio. Background removal allows users to manually adjust masks. Concat can be controlled via MCP server, JSON-RPC API, gRPC, or a command-line tool.
The project emphasizes the importance of obtaining consent when using voice cloning, and does not mention such restrictions. To assess Concat, the author suggests testing it with a real video edit, comparing the agent's capabilities to manual editing.
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