The FFmpeg app and MCP server
Shrink videos for email or Discord, convert video and audio, pull out MP3s, even out volume, make GIFs and trim clips — on your own computer, no uploading.
Free · no account · 3 free uses of every tool · also for Mac (Intel), Windows, Linux
Make a video much smaller (or turn any video into a widely playable MP4). Lower quality and smaller size = smaller file.
Save just the sound of a video as an MP3 — for music, lectures or podcasts.
Convert any audio (or the sound of a video) to MP3, M4A, WAV or FLAC — and optionally even out the volume so quiet recordings are easy to hear.
Turn a short part of a video into a good-looking animated GIF.
Cut out a part of a video instantly, without re-encoding (no quality loss). Cuts snap to the nearest keyframe.
GUI Hub gives your assistant these 5 tools. Install it once (below) and ask in plain words.
| MCP tool | What it does | Inputs |
|---|---|---|
| ffmpeg_compress | Make a video much smaller (or turn any video into a widely playable MP4). Lower quality and smaller size = smaller file. | input* string quality string size string audio string out* string |
| ffmpeg_audio | Save just the sound of a video as an MP3 — for music, lectures or podcasts. | input* string bitrate string out* string |
| ffmpeg_audio_convert | Convert an audio or video file's sound to mp3, m4a, wav or flac. normalize=true applies EBU R128 loudness normalization (loudnorm) — good for voice recordings and podcasts. | input* string format string normalize boolean out* string |
| ffmpeg_gif | Turn a short part of a video into a good-looking animated GIF. | input* string start string duration number width string out* string |
| ffmpeg_trim | Cut out a part of a video instantly, without re-encoding (no quality loss). Cuts snap to the nearest keyframe. | input* string start* string end* string out* string |
* required
Free to try — 3 full uses of every tool.
Download the one-file extension, double-click it, press Install. Done — ask Claude for a file job.
Download gui-hub.mcpbAdd an MCP server with this command (needs Node.js 18+):
npx -y github:MuttyRab/MuttyRab.github.io
Claude Code:
claude mcp add gui-hub -- npx -y github:MuttyRab/MuttyRab.github.io
Point-and-click forms for every tool, plus a Use with AI button that connects Claude Desktop or Cursor for you.
Download for WindowsNew independent apps get this one-time caution. The full source is public on GitHub.
“Compress / convert to MP4” runs the official FFmpeg 6.1.1 program with arguments passed directly — never through a shell.
ffmpeg -y -i /Users/you/Movies/in.mov -vcodec libx264 -crf 28 -preset medium -pix_fmt yuv420p -acodec aac -ab 128k -movflags +faststart /Users/you/out.mp4
Use Video Toolkit 3 times free. $9 once unlocks all of GUI Hub Essentials.
Every tool works 3 times free first. Secure checkout by Polar; your license key arrives by email — paste it into the app, or just give it to your AI. 30-day refunds.
Powered by FFmpeg 6.1.1 (GPL-3.0 (static build)), static build from eugeneware/ffmpeg-static, downloaded from its official release and verified by SHA-256. GUI Hub is independent and not affiliated with FFmpeg.