ffmpeg-skill

Local video editor for coding agents: 42 FFmpeg tools with a machine-readable contract and an MCP server, for Claude Code, Cursor and Codex. Cut, captions, reframe, loudness, platform exports. No cloud, no API keys.

Active — Updated in the last 14 days
Multi-agent — Targets three or more agents

Works with

Claude
Codex
Cursor

View on GitHub

2k GitHub stars (1,961)

14 skills (14 skills found in its SKILL.md files)
160 forks (160 forks)
Today last update (Last updated today)

Install

Skills CLI

npx skills add kajisho5/ffmpeg-skill

Asks which skills and agents to install. Just one: npx skills add kajisho5/ffmpeg-skill --skill ffmpeg-skill — add -g for every project.

Claude Code

git clone https://github.com/kajisho5/ffmpeg-skillcp -r "ffmpeg-skill" ~/.claude/skills/ffmpeg-skill

Copies the ffmpeg-skill skill into ~/.claude/skills/ for every project (use .claude/skills/ for one project). Repeat for the other skills listed below.

Plugin

/plugin marketplace add kajisho5/ffmpeg-skill

Run inside Claude Code if the repository ships a plugin marketplace, then pick plugins from /plugin.

Skills can run code on your machine — read the SKILL.md first.

What it does

Filter skills

In the author's own words, from each skill's SKILL.md.

ffmpeg-skill

Edit video and audio with local FFmpeg from natural-language requests: cut, trim, join, resize/reframe (9:16, 1:1), speed change, captions and subtitles (SRT/ASS, animated, karaoke), logos and text overlays, lower-thirds and titles, silence removal, multicam and external-mic sync, loudness normalisation, HDR/Dolby Vision to SDR, LUTs, background music with ducking, platform exports (YouTube, Reel…
SKILL.md on GitHub (opens in a new tab)
shipping-build-artifacts

Make the build step a real gate on what you actually distribute — build scripts that warn and exit 0 on a missing input, size checks with only an upper bound, hand-maintained file lists that drift from the entrypoints they must cover, committed bundles that go stale when only the source changes, GNU-only shell in release scripts that aborts on the other OS, and verification that runs against the…
.claude/skills/build-artifacts/SKILL.md on GitHub (opens in a new tab)
ci-pipeline-synthesizer

Generate GitHub Actions CI/CD pipeline configurations for automated building and testing of library and package projects. Use when creating or updating CI workflows for npm packages, Python packages, Go modules, Rust crates, or other library projects that need automated build and test pipelines. Includes templates for common package ecosystems with best practices for dependency caching, matrix te…
.claude/skills/ci-pipeline-synthesizer/SKILL.md on GitHub (opens in a new tab)
reviewing-ffmpeg-skill-changes

Review a change to the ffmpeg-skill repository for the failures its own contract makes possible — a claim in a result document that is true at one layer and false at the layer a caller reads, a new flag that reaches the code but not the contract/docs/demo surfaces, a "bug" that docs/design-decisions.md already decided with a pinning test, a fix with no regression test, a new runtime dependency or…
.claude/skills/code-review/SKILL.md on GitHub (opens in a new tab)
concurrent-branches

Resolve conflicts and merges when several branches are open against one repo at the same time — the hotspot files every change must touch (registry manifests, a single version field, shared tool config, one aggregated test module, tracked build output), union-vs-recompute-vs-rebuild as three different correct resolutions, generated artifacts that must never be merged, non-deterministic serializat…
.claude/skills/concurrent-branches/SKILL.md on GitHub (opens in a new tab)
shipping-across-surfaces

Land a change everywhere the same fact is stated — enumerating the full surface inventory (landing copy, docs, machine-readable summaries, changelog badges repeated across every page, sitemap, README, descriptions embedded in code, and untyped frontend consumers of typed responses), generating a surface instead of restating it, drift tests where you cannot generate, never hand-maintaining a copy…
.claude/skills/cross-surface-changes/SKILL.md on GitHub (opens in a new tab)
writing-defect-reports

Establish a finding before you publish it, and correct it after — headlines that overstate what actually reproduces at the layer a user sees, reporting code that no entry point can reach or that is already dead, filing a caveat the project's own records already answered, re-verifying your prior notes against the tree instead of against the note, choosing the narrowest injection point that reprodu…
.claude/skills/defect-reports/SKILL.md on GitHub (opens in a new tab)
guarding-destructive-operations

Add and review preconditions on operations that delete, overwrite, rewrite history, or resolve a caller-supplied name to a filesystem path — refusing instead of warning, placing the guard ahead of the first mutation, structural classification rather than string-prefix matching, name validation plus resolved-path containment as two independent checks, why a guard on the destructive path is invisib…
.claude/skills/destructive-operations/SKILL.md on GitHub (opens in a new tab)
keeping-git-repos-clean

Prevents, detects, and remediates files that should never be committed — secrets (.env, API tokens, hardcoded credentials) and dev artifacts (build output, scratch databases, editor/OS files). Covers .gitignore (and why it does not untrack), git rm --cached, auditing tracked files, history scrubbing, and credential rotation. Use when a repo has committed secrets or junk, when setting up a new rep…
.claude/skills/git-hygiene/SKILL.md on GitHub (opens in a new tab)
running-github-actions-efficiently

Cut GitHub Actions minutes and wall-clock time without losing coverage — the OS billing multiplier (macOS 10x / Windows 2x / Linux 1x), trigger hygiene that stops push+pull_request double-firing, concurrency that cancels superseded runs, dependency caching keyed on lockfiles, matrix discipline, and auditing scheduled crons that bill 24/7. Use when CI is burning included minutes, when runs feel sl…
.claude/skills/github-actions/SKILL.md on GitHub (opens in a new tab)
building-python-mcp-servers

Builds robust Python MCP (Model Context Protocol) servers with FastMCP — tool design, error contracts, event-loop-safe blocking work, subprocess/CLI wrapping, single-file vs packaged distribution, global-state-free testing, and prompt-injection awareness. Use when writing an MCP server, exposing a tool or CLI to an LLM client, debugging tool registration/packaging, or testing MCP tools.
.claude/skills/mcp-server-design/SKILL.md on GitHub (opens in a new tab)
managing-python-releases

Manages Python library releases including semantic versioning, changelog maintenance (Keep a Changelog format), release automation with GitHub Actions, and deprecation workflows. Use when planning releases, writing changelogs, automating release pipelines, or communicating breaking changes.
.claude/skills/release-management/SKILL.md on GitHub (opens in a new tab)
reproducing-ci-locally

Run the CI gate on your machine so it agrees with the runner — deriving the exact command, paths, markers, and env from the workflow file instead of the Makefile, unblocking gate steps that short-circuit and hide the next failure, pinning the linter version CI resolves, building the interpreter/toolchain environment the runner builds, and confirming the run is green instead of explaining a red jo…
.claude/skills/reproducing-ci-locally/SKILL.md on GitHub (opens in a new tab)
verifying-external-behavior

Confirms what a third-party library, remote API, build backend, or scraped document actually does before writing code that depends on it — throwaway probes that run in seconds, permissive clients that forward wrong arguments instead of rejecting them, per-endpoint docs that don't generalize, response shapes that make a "fast path" always-false, fakes that encode your assumption rather than the se…
.claude/skills/verifying-external-behavior/SKILL.md on GitHub (opens in a new tab)

Review before you install

A skill is a set of instructions and scripts your agent will follow, and it can run code on your machine. Read the SKILL.md and any scripts first — this listing is not a security review.

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ffmpeg-skill