A toolset for processing video and audio files with FFmpeg, a widely used command-line media utility. It handles tasks such as changing formats, resizing, compressing, and extracting audio.

Converting GIFs to MP4, resizing or compressing media, extracting sound from video, and preparing media assets for Remotion, a tool for creating videos with code.

It removes the need to work out separate media-conversion commands for common file-preparation tasks.

ffmpeg — Skill for Claude Code and Codex by c18229039407-arch/cutlin

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add c18229039407-arch/cutlin --skill ffmpeg

Clone the repo

git clone --depth 1 https://github.com/c18229039407-arch/cutlin

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/c18229039407-arch/cutlin/ffmpeg/github.svg)](https://agentmods.dev/skills/c18229039407-arch/cutlin/ffmpeg)

Your own site

<a href="https://agentmods.dev/skills/c18229039407-arch/cutlin/ffmpeg"><img src="https://agentmods.dev/badge/skills/c18229039407-arch/cutlin/ffmpeg/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/c18229039407-arch/cutlin/ffmpeg"><img src="https://agentmods.dev/badge/skills/c18229039407-arch/cutlin/ffmpeg.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,352 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00055	$0.04352
Opus 5.5	$0.00022	$0.01741
Sonnet 5.5	$0.00011	$0.00870
Haiku 4.5	$0.00006	$0.00435

Measured 2mo ago against content hash 20a0c1e35a68, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ffmpeg scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/ffmpeg/SKILL.md · 433 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

reference.md 4.6 KB

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 433 lines · 55 tokens per session scan A 20a0c1e35a68

Subscribe to this mod's changes

ffmpeg is a skill published in the GitHub repository c18229039407-arch/cutlin (17 stars, last pushed 3mo ago), licensed AGPL-3.0. It adds 55 tokens to every session and 4,352 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Creative and media

ffmpeg next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ffmpegc18229039407-arch/cutlin	Skill	17	3mo ago	AGPL-3.0	A	55	Claude Code, Codex
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code