FFmpeg Skill — tool skill for tools & renderers

For AI agents: find the right skill in one call — curl -s "https://skills.varg.ai/api/search?q=<what the person wants>" returns the matching use case and the best skills with install commands, as markdown (Russian works too). Full index: https://skills.varg.ai/llms.txt. Every page has a markdown twin: add .md to its path. Before generating anything, show the person the options on the use-case page.

Local video editor for agents: 42 FFmpeg tools with a machine-readable contract and an MCP server; no cloud, no keys.

What it does

A local FFmpeg engine for coding agents: 42 tools behind a machine-readable contract (contract --json) and an MCP server, covering cut, trim and join, 9:16 and 1:1 reframes, speed changes, SRT/ASS captions (animated and karaoke), logos and lower thirds, silence removal, multicam and external-mic sync, loudness normalization, HDR/Dolby Vision to SDR, LUTs, ducked background music, platform exports (YouTube, Reels, TikTok, X), compliance checks, scene detection, highlight reels and contact sheets to inspect results. The skill tells the agent what to ask, what to assume and how to report, uses only the Python 3.10+ standard library, and ships evals and a doctor command.

Use when

Not for

Install

Models it drives: whisper

Example output

https://skills.varg.ai/previews/ffmpeg-skill.mp4 — The repo's demo GIF: before/after on an FFmpeg test pattern as the skill's tools burn animated captions ('Captions burned in with libass', 'Cut, fit, sync, normalise, export'). Full 12 s loop, converted from GIF; per-feature demos are in docs/demos. (credit: Shogo Kajiyama (ffmpeg-skill), https://github.com/kajisho5/ffmpeg-skill/tree/main/assets)

Used for

More tools & renderers skills