TrimScript MCP server

TrimScript

<!-- mcp-name: io.github.SilverNine/trimscript -->

Edit video by editing the transcript. Runs on your machine. Free and open source. AI edits arrive as suggestions you approve.

Delete the restarted intro, Trim fillers, Tab through the edits to listen, Tighten pauses: 48.1 s down to 27.6 s. The demo talk is synthetic: script and slides written for this demo, voice generated with Dia.

▶ Watch the 50-second demo: the same edit, then Claude Code suggesting cuts through the MCP server.

uvx trimscript open my-video.mp4

Needs uv and ffmpeg (brew install ffmpeg, apt install ffmpeg, winget install ffmpeg). Transcription, editing and export run on your machine: no account, no upload. If you connect a coding agent, that agent (and the model service behind it) reads the transcript.

Status: early. Developed on macOS with Apple Silicon. CI runs every push end to end on macOS, Linux and Windows (transcribe, remove, export); the editor itself has only been used on macOS so far.

What it does

• Transcribes locally with whisper.cpp, prompted to keep every "um" and "uh" instead of tidying them away. English only for now. The first run downloads the model (about 470 MB).
• Delete text, and the video skips it. Select words, press ⌫. The removed part folds into a small label with the seconds it saves, so the page reads like the finished edit. Select the label and press ⌫ to bring it back, or show all removed text with one switch. The preview skips removed parts as it plays.
• Trim fillers removes every um and uh in one go, and Tighten pauses shortens every pause over a second, keeping a little silence. Then press Tab to step through the edits and hear a second and a half on either side of each; ⌫ brings one back, ⌘Z brings them all back.
• Stray sounds jumps to voice between words that has no word in the transcript (a sound the recognizer skipped, a breath, half a word) and plays it. You listen and decide.
• Fine-tune any join by 10 ms with the arrow keys, listening across it each time.
• Clean audio: noise, level, gentle compression and loudness to -14 LUFS in one switch. The recording length never changes.
• Fix misheard words (E) without touching the media. Captions use the corrected text.
• Export MP4, WAV, SRT/VTT captions, or FCPXML to keep editing in Final Cut Pro or DaVinci Resolve with every edit point still adjustable.
• Nothing is destroyed. Your edit is one readable JSON file next to the video. The original file is never modified, and exports never overwrite it.

Use it with your coding agent

TrimScript ships an MCP server, so Claude Code, Codex or any MCP client can read the transcript and propose edits. Agent edits never apply silently: they show up in the open editor as suggestions with a reason, and you decide.

claude mcp add trimscript -- uvx trimscript mcp

Then ask things like:

• "In my-video.mp4 I restart the demo halfway through. Suggest removing the first attempt."
• "The speaker's product is called Acme, fix it wherever the transcript misheard it."

Tools: transcribe, gettranscript, suggestremoval, correcttext, listedits, withdraw, enhance_voice, export.

The same actions are on the command line:

Shortened. The full README is on GitHub.