#293 by GitHub stars

kajisho5/ffmpeg-skill

Edit video and audio with local FFmpeg: cut, join, reframe, speed, captions, overlays, silence removal, sync, loudness, HDR to SDR, platform exports and checks. Use whenever the user mentions a video or audio file (mp4, mov, wav, m4a), footage, captions, a reel or short, YouTube/TikTok delivery, LUF

Claude Code Codex Engineering Legal Writing

History

Review weekly changes to SKILL.md before updating. Dates mark the weeks in which we observed each version; checks apply to the recorded commits.

View weekly changes

`SKILL.md`

Week of Nov 2, 2026 · +177 / −188 lines

Before Network or broad shell → After Network or broad shell

1ae1bdf1ca0a → 1ce2c186bf1d

- 3 description: '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, Reels, TikTok, X), compliance checks, scene detection and highlight reels, contact sheets to inspect results, and whole-edit project files. Use this skill whenever the user mentions a video or audio file (mp4, mov, mkv, wav, m4a), footage, a clip, captions, subtitles, a reel or short, YouTube/Instagram/TikTok delivery, LUFS, sync, transcoding, ffmpeg, or asks to make something "60 seconds", "vertical", "louder", "captioned" — even when they do not say "edit". Python 3.10+ standard library only (3.9 deprecated), no cloud, no API keys.'
+ 3 description: 'Edit video and audio with local FFmpeg: cut, join, reframe, speed, captions, overlays, silence removal, sync, loudness, HDR to SDR, platform exports and checks. Use whenever the user mentions a video or audio file (mp4, mov, wav, m4a), footage, captions, a reel or short, YouTube/TikTok delivery, LUFS or ffmpeg, even without saying "edit". Needs FFmpeg 6.1+ and Python 3.10+; stdlib only, no cloud.'
- 8 Scripts live in `scripts/` next to this file; run them with `python3 <skill-dir>/scripts/<name>.py`, and delivery templates in `templates/`. This file is enough to do a job: the table below routes the request, and `--help` on the script about to run is the cheapest full flag list. A reference file costs as much as this one; open one only for a question you have: `references/scripts.md` (every flag of all 42 scripts), `references/devices.md` (iPhone HDR, GoPro, DJI, screen recordings, Zoom), `references/gotchas.md` (the long form of the one-line rules at the end). MCP: `tools/list` shows only the core 12 by default; the other 30 (per this table) stay callable by name via `tools/call`, described by `contract --json`; set `FFMPEG_SKILL_MCP_FULL=1` for all 42.
- 9 
- 10 Shared flags (every script): `--dry-run`; `--json` (output path, its probe, the commands run); `--json-brief` (status/output/verified + a `summary`; prefer on writing steps); `--fast` (preview quality); `--progress` (percent/ETA); `--timeout SECONDS` (`kind: timeout`, default 1800; `0` for hour-long encodes); `--overwrite` (step 7); `--plan FILE` (a dry run `render.py FILE` runs later; refuses if an input changed). Re-encoding tools also take `--hw` (Apple Silicon GPU, big files; `FFMPEG_SKILL_HW=1` = default, not export), `--codec h264|hevc|av1|prores` and `--quality N`: unset, SDR is x264 (`cut.py --keep-hevc`: HEVC source stays HEVC), HDR is x265 Main10; `prores` needs `-o NAME.mov`, `h264` refuses HDR (`color.py --to-sdr` first).
- 11 
- 12 Writing tools run nothing under `--dry-run`; the measuring tools (`probe`, `check`, `sync`, `multicam`, `scenes`, `cropdetect`, `report`, `silence`, `loudness`, `stabilize`; `overlay` for a multi-line `--text` on FFmpeg 8.0-8.1.0) may still run ffmpeg/ffprobe, skipping artifacts/side files (`--edl`, `--sheet`, a generated `.ass`); `verify` ignores the flag. Per tool: `contract --json` `dry_run`.
+ 8 ## Quick start
+ 9 
+ 10 Run `python3 <skill-dir>/scripts/<name>.py`; the table below routes requests, `--help` lists every flag.
+ 11 MCP `tools/list` shows the core 12; the other 30 of the 42 tools stay callable by name.
+ 12 
+ 13 Shared flags (the rest, codec defaults and `--hw`: `references/flags.md`):
+ 14 `--dry-run` (plan, write nothing), `--json` (output, probe, commands), `--json-brief` (status + `summary`),
+ 15 `--overwrite` (step 7), `--timeout SECONDS` (default 1800, `0` = none; `kind: timeout`).
+ 16 
+ 17 Writing tools run nothing under `--dry-run`; the measuring tools (`probe`, `check`, `sync`, `multicam`,
+ 18 `scenes`, `cropdetect`, `report`, `silence`, `loudness`, `stabilize`, `overlay`) may still run
+ 19 ffmpeg/ffprobe without writing artifacts; `verify` ignores the flag. Per tool: `contract --json` `dry_run`.
+ 20 
+ 21 Audio-only files work in the audio tools; picture tools refuse them (`references/workflow.md#audio-only-files`).
- 16 0. **Environment, only on failure.** Never start a job with `doctor`: a broken machine fails with `kind: missing_tool` or an ffmpeg error naming the filter/encoder. Run `python3 <skill-dir>/scripts/_contract.py doctor` (or `npx ffmpeg-skill doctor`) after such a failure, or when asked what the machine can do: read `ok`/`usable`, report the missing capability. `contract --json`'s tool schema is for a *planning* agent, not this workflow.
- 17 1. **Probe what you must plan from.** Run `probe.py` on each input you plan from — duration, fps, resolution, codecs, channels, `variable_frame_rate_suspected` — and whenever the user asks about a file. No separate probe before every edit: every writing tool's `--json` already carries its input and a probe of the output. Plan from real numbers, never assumptions.
- 18 2. **Prefer lossless.** If the request can be met without re-encoding (plain cuts on keyframes, remuxing, audio-only changes), do not re-encode. `cut.py` and `loudness.py` stream-copy video by default; `--accurate` on `cut.py` only for frame-exact cuts.
- 19 3. **Plan with `--dry-run --json`, then execute.** Trust `--json`, not a dry run's summary line, for any number in the plan (a dimension there can be a placeholder). Use before long encodes, to report facts. Never point `-o` at a file you did not create in this job unless the user asked for it to be replaced; pass `--overwrite` only then.
- 20 4. **Chain in a sensible order.** A delivery request with no other editing is one template run (`render.py --template NAME INPUT`), not a hand-built chain. Otherwise: colour (HDR→SDR / LUT) → cut → join → silence → fit → caption/overlay → sync → audio → loudness → export. Frame changes before captions, so text is sized for the final frame. Re-encode as few times as possible: intermediates at CRF 18, `export.py` last. **Three or more steps: `render.py` with a project.json.**
- 21 5. **Check the deliverable.** Before reporting, run `check.py OUTPUT --platform X` for the destination named (a template run already does). Format rows (codec, pixel format, size, true peak, colour tags, VFR) are safe to fix. Judgement rows change content: duration (cut loses material), aspect (crop loses edges), fps (drops motion), loudness (ambience must not be boosted) — fix only when the request implies the answer, else state the choice and its cost. Mention WARNs; do not chase them.
- 22 6. **Verify the output.** Confirm duration, resolution, fps and audio match the request, from the writing tool's `--json`/`--json-brief` probe or `probe.py`, and report those numbers ("final.mp4: 59.98 s, 1080x1920, 30 fps, AAC stereo"). A step is done only when the script exited 0 and the output probes as expected: a non-zero exit, a missing or empty file, or a probe that contradicts the request is a failure reported with the script's error message.
- 23 7. **Keep the user's originals.** Never overwrite the source; write new files next to input or where asked. An existing output path is refused (`kind: input`); `--overwrite` is the one way to say "yes, replace it".
- 24 8. **Look at the picture.** Whenever the picture changed (captions, overlays, graphics, crop/pad, resize, colour, transitions, a `join.py` scaling a clip to the first clip's frame, `color.py --to-sdr`) run `look.py OUTPUT --tiles 3x2` (or `--at T` for one frame) and view the PNG (4x3 for whole-clip layout). Not finished until `Look:` names that PNG — a probe cannot see a caption on a face. Audio-only: `Look: not needed`. What to look for splits like `check.py`'s rows in step 5:
- 25    - **Mechanical (this skill's own job to verify and report):** the specified text/logo is at the specified position, subtitles appear at the specified timestamps, dimensions are even. Letterboxing from `fit.py --fit pad` is the *correct* result of that mode, never a defect to flag.
- 26    - **Judgement (report it, don't silently pass or fail):** whether a subject or face is cut off, text sits over a face, colours look washed out, a transition lands. These need deciding what the subject *is*, the calling agent's call — say what you see in one line; they judge.
- 27    With no vision capability, write `Look: PATH (pixels not inspected; agent has no image view)` — never claim a picture was inspected when it wasn't, without stalling for a capability that isn't there.
+ 25 Every step in full: `references/workflow.md`.
+ 26 
+ 27 0. **Environment, only on failure:** after `kind: missing_tool` or an ffmpeg error, run
+ 28    `scripts/_contract.py doctor` and report what is missing. Never start with it;
+ 29    `contract --json` is for planners.
+ 30 1. **Probe what you plan from** (`probe.py`); plan from real numbers, never assumptions.
+ 31 2. **Prefer lossless:** no re-encode when a cut, remux or audio-only change suffices.
+ 32 3. **Plan with `--dry-run --json`, then run.** Trust `--json` numbers, not the summary line.
+ 33 4. **Chain:** colour → cut → join → silence → fit → caption/overlay → sync → audio → loudness → export.
+ 34    A delivery request is one `render.py --template`; three or more steps: a `render.py` project.
+ 35 5. **Check** with `check.py OUTPUT --platform X --expect-identity S:M` (the writer's `output_identity`):
+ 36    fix format rows; fix duration, aspect, fps or loudness only when the request implies it. Mention WARNs.
+ 37 6. **Verify** from the writer's `--json` probe or `probe.py`: exit 0 and the requested numbers, or it failed.
+ 38 7. **Keep originals:** never overwrite a source; `--overwrite` only for this job's files or ones the user
+ 39    asked to replace.
+ 40 8. **Look** after any picture change: `look.py OUTPUT --tiles 3x2`, view the PNG, name it in `Look:`;
+ 41    flag judgement issues in one line. No vision: say the pixels were not inspected.
- 31 Ask a short question only when the answer changes the output materially and the request does not imply it. When several things are open at once (a vague "make it for social media" leaves destination, aspect, length and captions open), don't ask one per turn: propose one bundle with your defaults and let the user change any part ("Reels: 9:16 padded, 60 s, -14 LUFS, no captions — OK?"). One question, one answer, then the run. Never ask for what `probe.py` can tell you.
- 32 
- 33 - **Destination** decides aspect, length limit, loudness and codec; "for Reels" answers all four and names a template. No destination and a plain cut/caption: keep the source format and say so. If the user says "export", "post" or "deliver", ask where.
- 34 - **Duration** ("make it 60 s") without a method: speed up for ≤1.5× changes, trim otherwise, say which. Ask when the content is a talk (trimming loses words) and the change is large.
- 35 - **Captions** without a text source: `--transcribe` if a local engine exists, else ask for the text or a timed file; never invent dialogue.
- 36 - **Fonts and brand**: if the user mentions a brand, colours or "our font", ask for or create `brand.json` once, reuse it.
- 37 - **CJK / non-Latin text**: let the tool pick the font by script (`--font` turns it off); `--lang ja|ko` for Han-only text. `doctor --json` `.fonts.scripts` says what renders here. Tofu is a failed job.
- 38 - **Crop position** for `--fit crop`: centre by default, but when the request or the source names an off-centre subject ("keep the product on the right", someone visibly off-centre in the sheet) use `--crop-x`/`--crop-y` (0=left/top, 1=right/bottom) instead of guessing centre, or ask which edge to keep.
- 39 - Anything else (transition type, caption style): pick the conventional default, say what you picked, offer the alternative in one line.
+ 45 Ask only when the answer changes the output and the request does not imply it; bundle open choices
+ 46 into one proposal ("Reels: 9:16 padded, 60 s, -14 LUFS, no captions — OK?"). Never ask what a probe tells.
+ 47 
+ 48 - **Destination** sets aspect, length, loudness, codec; "export/post/deliver" with none named: ask.
+ 49 - **Duration** without a method: speed for ≤1.5×, else trim; ask for a talk with a large change.
+ 50 - **Captions** without text: `--transcribe` if an engine exists, else ask; never invent dialogue.
+ 51 - **Brand, CJK text, crop position:** `references/workflow.md` (ask/assume section).
+ 52 - Anything else: pick the conventional default, say so, offer the alternative in one line.
- 43 This skill cuts, joins, measures, syncs, exports and checks files — it executes an edit, it does not decide one. What belongs to the human, the calling agent or another skill:
- 44 
- 45 - **Which cut is right, or whether a deliverable is approvable** — this skill measures and reports (`check.py`'s PASS/WARN/FAIL, `cut.py`'s duration error); the user or production agent decides whether that ships.
- 46 - **What makes a highlight interesting** — `scenes.py --highlights` ranks by a measured proxy (audio energy, duration): candidates, not a verdict.
- 47 - **Thumbnail or cover composition** — a design decision, not measurement.
- 48 - **Understanding what a video is *about*** — there is no vision here beyond `look.py`'s contact sheets, for the calling agent's eyes, not for this skill to interpret.
- 49 - **Judging what looks good** — "apply this LUT", "correct exposure by +0.3 stops" (`color.py`) is mechanical; "grade this scene to look cinematic" belongs to a colour-grading skill ([`color-grading-skill`](https://github.com/kajisho5/color-grading-skill)) that decides the parameters, then calls `color.py`.
- 50 - **The words in a caption** — cue text is burned as written. Too long for the frame means a smaller size, `--max-lines`, or the user's own edit; never rewrite, shorten or paraphrase it, even when asked to "make it fit" — say so, offer `--max-lines 1` at a smaller size.
- 51 - **Picking a subject or region you were not given** — "crop to x=200,y=0" is mechanical once the box is known; "crop to keep the speaker in frame" needs deciding *what* the speaker is, a judgement for the calling agent (from a `look.py` sheet).
- 52 
- 53 The line: same input + same explicit parameters always producing the same verifiable output belongs here; anything depending on taste, understanding or what looks or sounds good belongs to whoever makes that judgement.
- 54 
- 55 If a request needs an FFmpeg feature none of the 42 scripts expose, say so and name the closest built-in option — never guess a raw `ffmpeg`/`ffprobe` invocation outside `scripts/*.py`. It bypasses every guarantee this skill makes, so it is never a fallback.
- 56 
- 57 ## Request → script
- 58 
- 59 This table and `doctor --json`'s `tools` list are the source of truth for what exists: name only a script you have seen in one of them (there is no `doctor.py`, no `trim.py`, no `subtitle.py`).
- 60 
- 61 Timestamp flags (`--start`, `--end`, `--at`, `--from`, `--duration`, `--offset`, and the times in cue and chapter files) take seconds, `mm:ss(.fff)`, `hh:mm:ss(.fff)` or SMPTE `hh:mm:ss:ff` with `@fps` (`00:01:02:15@29.97`) — paste an NLE cue sheet as-is; length flags (`--min-silence`, `--margin`, `--fade`) are plain seconds.
- 62 
- 63 | User says | Do |
- 64 |-----------|----|
- 65 | "cut from 1:20 to 2:05", "trim the first 10 s" | `cut.py input.mp4 --start 1:20 --end 2:05` |
- 66 | "keep only these parts", "remove the middle" | `cut.py input.mp4 --segments 0-1:00,1:30-2:00` |
- 67 | "make it exactly 60 seconds" | `fit.py input.mp4 --duration 60` (speed) or `--method trim` |
- 68 | "cut this and make it HEVC / AV1 / ProRes" (output codec named) | `cut.py input.mp4 --start 0:10 --end 0:40 --codec hevc` (ProRes needs `-o NAME.mov`) |
- 69 | "cut out the pauses", "jump cuts" | `silence.py input.mp4 [--threshold -40 --min-silence 0.8]` |
- 70 | "cut the ums and uhs", "remove the filler words" | `silence.py input.mp4 --filler --words words.json` (measured word timings; `--transcribe` makes them) |
- 71 | "don't cut inside a sentence, just the real pauses" | `silence.py input.mp4 --speech-aware` — a breath under `--min-silence` inside a sentence is kept, only sentence-boundary pauses cut; composes with `--filler` into one list |
- 72 | "a 60 s highlight from this hour" | `scenes.py long.mp4 --highlights 6 --target 60 --edl picks.txt` → `cut.py --segments` |
- 73 | "cut on the beat", "edit it to the music" | `scenes.py track.mp4 --beats --json > beats.json`, then `cut.py input.mp4 --segments ... --snap beats --snap-source beats.json` (`--snap-source` carries the measured grid over) |
- 74 | "speed up here, slow-mo there" (known segments) | `speedramp.py action.mp4 --segment 0-3:1.0 --segment 3-4:0.25 --segment 4-8:2.0` |
- 75 | "hold on this frame", "freeze the last frame" | `freeze.py clip.mp4 --hold 2` |
- 76 | "smooth slow motion", "half speed but fluid" | `fit.py input.mp4 --duration 2x --smooth interpolate` (slow) or `--smooth blend` |
- 77 | "reverse this clip" | `reverse.py input.mp4` |
- 78 | "loop this clip to fill 30 seconds" | `loop.py bg_loop.mp4 --duration 30` |
- 79 | "make it vertical / 9:16 / square" | `fit.py input.mp4 --aspect 9:16 --fit pad` (or `--fit crop`; `--pad-fill blur` for blurred bars) |
- 80 | "resize to a height/width" | `fit.py input.mp4 --height 1080` (or `--width`, or both for an exact frame) |
- 81 | "crop to this exact box" (known x/y/w/h) | `crop.py input.mp4 --x 100 --y 0 --width 1080 --height 1920` |
- 82 | "blurred background instead of black bars" | `fit.py input.mp4 --aspect 9:16 --fit blur` (whole picture kept, borders a blurred, darkened copy) |
- 83 | "rotate 90 degrees", "mirror it" | `fit.py input.mp4 --rotate 90` / `fit.py input.mp4 --flip h` |
- 84 | "the horizon is tilted" (known degrees) | `straighten.py tilted.mp4 --degrees -2.5` |
- 85 | "flat view out of this 360 video" (known yaw/pitch/fov) | `sphere.py insta360.mp4 --yaw 90 --pitch 0 --h-fov 100 --v-fov 70` |
- 86 | "this old footage is interlaced" | `deinterlace.py input.mp4` |
- 87 | "it's grainy/noisy, clean it up" | `denoise.py input.mp4 --strength medium` |
- 88 | "blur/pixelate this face/plate" (known box) | `redact.py input.mp4 --x 820 --y 140 --width 240 --height 240 --mode pixelate` |
- 89 | "remove this fixed logo" (known box) | `redact.py input.mp4 --x 40 --y 20 --width 180 --height 60 --mode delogo` |
- 90 | "stabilize this shaky footage" | `stabilize.py input.mp4` |
- 91 | "are there black bars on this?" | `cropdetect.py input.mp4` |
- 92 | "iPhone Dolby Vision clip looks wrong" | `color.py clip.mov --to-sdr` or `--strip-dovi` (keep HDR, drop the DV layer) |
- 93 | "the colours look washed out / iPhone HDR" | `color.py input.mov --to-sdr` (probe shows `hdr: true`) |
- 94 | "apply this LUT", "convert the S-Log footage" | `color.py input.mp4 --lut grade.cube [--lut-strength 0.7]` |
- 95 | "the colours are tagged wrong" | `color.py input.mp4 --retag bt709` (stream copy; re-encodes only if the copy can't carry it — see `reencoded`) |

This preview is limited. See the complete change on GitHub.

Compare on GitHub

Week of Oct 26, 2026 · Line counts unavailable

Before Not checked yet → After Network or broad shell

First observation → 1ae1bdf1ca0a

No earlier version was observed for comparison.

Compare on GitHub

View on GitHub Add to my skills

Verified commit 1ce2c186bf1dba96132d87274eee46df4f537e0e

Version-pinned installation · Claude Code

git clone --filter=blob:none --no-checkout https://github.com/kajisho5/ffmpeg-skill.git .hotskills/kajisho5-ffmpeg-skill && git -C .hotskills/kajisho5-ffmpeg-skill checkout --detach 1ce2c186bf1dba96132d87274eee46df4f537e0e
# Copy each selected skill directory from .hotskills/kajisho5-ffmpeg-skill into .claude/skills/<skill-name>/

Version-pinned installation · Codex

git clone --filter=blob:none --no-checkout https://github.com/kajisho5/ffmpeg-skill.git .hotskills/kajisho5-ffmpeg-skill && git -C .hotskills/kajisho5-ffmpeg-skill checkout --detach 1ce2c186bf1dba96132d87274eee46df4f537e0e
# Copy each selected skill directory from .hotskills/kajisho5-ffmpeg-skill into .agents/skills/<skill-name>/

4.6kGitHub stars

520stars in 7 days

1skill in this repository

132commits in 30 days

Heat

8.4

Star growth, last 7 daysAhead of 99% of tracked repositories
Star growth, last 24 hoursAhead of 99% of tracked repositories
Rank movement, last 7 daysAhead of 90% of tracked repositories
Commits, last 30 daysAhead of 95% of tracked repositories
Accounts asking about it through MCP, last 7 daysNot available
Hot votes this weekAhead of 0% of tracked repositories

Heat never changes the order by stars, and sponsorship never touches it. How heat works

Stars over time

Individual skills in this repository

ffmpeg-skill /

How it works

ffmpeg-skill

When your agent uses it

Edit video and audio with local FFmpeg: cut, join, reframe, speed, captions, overlays, silence removal, sync, loudness, HDR to SDR, platform exports and checks. Use whenever the user mentions a video or audio file (mp4, mov, wav, m4a), footage, captions, a reel or short, YouTube/TikTok delivery, LUFS or ffmpeg, even without saying "edit". Needs FFmpeg 6.1+ and Python 3.10+; stdlib only, no cloud.

What it loads into context

Frontmatter

122 tokens

Always available to the agent

SKILL.md

4,608 tokens

When the skill is activated

Reference documents

347,103 tokens

Loaded on request

Token counts are estimates. Scripts run separately; they are not counted as reference context.

The playbook

Quick start
Workflow (in this order)
Before you run anything: what to ask, what to assume
What this skill does and does not decide
Report format
Request → script
Things that look right but are wrong
References

Scripts executed separately

.github/scripts/build_pages.py
.github/scripts/bump_contract_md.py
.github/scripts/bump_roadmap_md.py
.github/scripts/design_decisions_index.py
.github/scripts/resolve_version.py
bin/install.js
demos/build.py
demos/pages_videos.py
evals/contract/check.py
evals/grade_runs.py
evals/grade_runs_24.py
evals/grade_runs_25.py
evals/run.py
evals/run_agents_25.sh
evals/write_fixtures.py
examples/make_demo.sh
mcp/server.py
package.json
scripts/_ass_overlay.py
scripts/_common/__init__.py
scripts/_common/asr.py
scripts/_common/color.py
scripts/_common/decision.py
scripts/_common/drawtext.py
scripts/_common/emit.py
scripts/_common/emoji.py
scripts/_common/fonts.py
scripts/_common/probe.py
scripts/_common/runner.py
scripts/_common/text.py
scripts/_common/timeline.py
scripts/_common/wrap.py
scripts/_contract.py
scripts/_platforms.py
scripts/audio.py
scripts/background.py
scripts/batch.py
scripts/broll.py
scripts/caption.py
scripts/check.py
scripts/color.py
scripts/crop.py
scripts/cropdetect.py
scripts/cut.py
scripts/deinterlace.py
scripts/denoise.py
scripts/export.py
scripts/fit.py
scripts/freeze.py
scripts/graphics.py
scripts/grid.py
scripts/insert.py
scripts/join.py
scripts/look.py
scripts/loop.py
scripts/loudness.py
scripts/metadata.py
scripts/multicam.py
scripts/overlay.py
scripts/pad.py
scripts/probe.py
scripts/proxy.py
scripts/redact.py
scripts/render.py
scripts/report.py
scripts/reverse.py
scripts/scenes.py
scripts/sequence.py
scripts/silence.py
scripts/speedramp.py
scripts/sphere.py
scripts/stabilize.py
scripts/straighten.py
scripts/sync.py
scripts/verify.py
scripts/waveform.py
tests/_fixtures.py
tests/bench_scenes.py
tests/bench_silence.py
tests/bench_sync.py
tests/bench_vt.py
tests/corpus.py
tests/release_check.sh
tests/run_parallel.py
tests/test_accel.py
tests/test_all.py
tests/test_analysis.py
tests/test_asr.py
tests/test_audio.py
tests/test_contract.py
tests/test_cut_copy.py
tests/test_delivery.py
tests/test_editing.py
tests/test_orchestration.py
tests/test_picture.py

Files

.claude-plugin/marketplace.jsonasset485 bytes
.claude-plugin/plugin.jsonasset897 bytes
.claude/settings.jsonasset429 bytes
.claude/skills/build-artifacts/SKILL.mddoc8,443 bytes
.claude/skills/ci-pipeline-synthesizer/SKILL.mddoc4,533 bytes
.claude/skills/ci-pipeline-synthesizer/assets/github-actions-go.ymlasset635 bytes
.claude/skills/ci-pipeline-synthesizer/assets/github-actions-nodejs.ymlasset644 bytes
.claude/skills/ci-pipeline-synthesizer/assets/github-actions-python.ymlasset726 bytes
.claude/skills/ci-pipeline-synthesizer/assets/github-actions-rust.ymlasset1,147 bytes
.claude/skills/code-review/SKILL.mddoc9,074 bytes
.claude/skills/code-review/references/result-honesty.mddoc4,942 bytes
.claude/skills/code-review/references/review-checklist.mddoc3,530 bytes
.claude/skills/code-review/references/surfaces.mddoc3,352 bytes
.claude/skills/concurrent-branches/SKILL.mddoc11,268 bytes
.claude/skills/cross-surface-changes/SKILL.mddoc11,903 bytes
.claude/skills/defect-reports/SKILL.mddoc12,200 bytes
.claude/skills/destructive-operations/SKILL.mddoc10,543 bytes
.claude/skills/git-hygiene/SKILL.mddoc8,508 bytes
.claude/skills/github-actions/SKILL.mddoc13,202 bytes
.claude/skills/mcp-server-design/SKILL.mddoc12,922 bytes
.claude/skills/release-management/SKILL.mddoc4,253 bytes
.claude/skills/reproducing-ci-locally/SKILL.mddoc11,440 bytes
.claude/skills/verifying-external-behavior/SKILL.mddoc10,913 bytes
.github/FUNDING.ymlasset17 bytes
.github/ISSUE_TEMPLATE/bug_report.mddoc791 bytes
.github/ISSUE_TEMPLATE/config.ymlasset245 bytes
.github/ISSUE_TEMPLATE/feature_request.mddoc515 bytes
.github/dependabot.ymlasset574 bytes
.github/pull_request_template.mddoc415 bytes
.github/release-drafter.ymlasset2,540 bytes
.github/scripts/build_pages.pyruns8,192 bytes
.github/scripts/bump_contract_md.pyruns2,052 bytes
.github/scripts/bump_roadmap_md.pyruns2,298 bytes
.github/scripts/design_decisions_index.pyruns2,581 bytes
.github/scripts/pages_layout.htmlasset3,362 bytes
.github/scripts/resolve_version.pyruns5,433 bytes
.github/workflows/ci.ymlasset8,481 bytes
.github/workflows/codeql.ymlasset1,408 bytes
.github/workflows/dependabot-auto-merge.ymlasset1,513 bytes
.github/workflows/pages.ymlasset1,369 bytes
.github/workflows/release-drafter.ymlasset2,449 bytes
.github/workflows/release.ymlasset17,613 bytes
.gitignoreasset379 bytes
.npmignoreasset494 bytes
.snykasset479 bytes
AGENTS.mddoc949 bytes
CHANGELOG.mddoc334,590 bytes
CODE_OF_CONDUCT.mddoc507 bytes
CONTRIBUTING.mddoc6,372 bytes
LICENSEasset1,065 bytes
README.mddoc103,296 bytes
SECURITY.mddoc1,060 bytes
SKILL.mdcore15,509 bytes
SKILL.mdcore15,509 bytes
SKILL.mdcore15,509 bytes
assets/demo.gifasset1,647,658 bytes
assets/icon.pngasset592,660 bytes
assets/logo.pngasset374,426 bytes
assets/social-preview.pngasset632,619 bytes
bin/install.jsruns10,555 bytes
brand/app-icon-dark.pngasset65,439 bytes
brand/app-icon.pngasset64,805 bytes
brand/ffmpeg-skill.icon/Assets/in-out.svgasset372 bytes
brand/ffmpeg-skill.icon/Assets/playhead.svgasset359 bytes
brand/ffmpeg-skill.icon/icon.jsonasset1,753 bytes
brand/logo/ffmpeg-skill-wordmark-black.svgasset4,216 bytes
brand/logo/ffmpeg-skill-wordmark-white.svgasset4,216 bytes
demos/CI.mddoc6,513 bytes
demos/build.pyruns105,471 bytes
demos/footage/README.mddoc620 bytes
demos/footage/ai_talk.mp4asset227,690 bytes
demos/footage/ai_talk_en.mp4asset673,832 bytes
demos/footage/ai_talk_en.words.jsonasset1,113 bytes
demos/pages_videos.pyruns2,782 bytes
docs/contract.mddoc104,572 bytes
docs/demos.mddoc39,107 bytes
docs/demos/audiogram.gifasset195,129 bytes
docs/demos/beats_snap.gifasset10,384 bytes
docs/demos/bgm_ducking.gifasset14,755 bytes
docs/demos/broll_cutaway.gifasset217,470 bytes
docs/demos/captions_ar.gifasset246,564 bytes
docs/demos/captions_emoji.gifasset219,624 bytes
docs/demos/captions_en.gifasset216,723 bytes
docs/demos/captions_fitsize.gifasset142,056 bytes
docs/demos/captions_ja.gifasset200,664 bytes
docs/demos/captions_ko.gifasset255,794 bytes
docs/demos/captions_multitrack.gifasset223,697 bytes
docs/demos/captions_phrase.gifasset196,271 bytes
docs/demos/captions_pop_karaoke.gifasset220,093 bytes
docs/demos/captions_zh.gifasset255,446 bytes
docs/demos/color_correct.gifasset251,845 bytes
docs/demos/color_lut.gifasset236,174 bytes
docs/demos/contact_sheet.gifasset233,762 bytes
docs/demos/crop_rect.gifasset152,168 bytes
docs/demos/cropdetect_crop.gifasset240,057 bytes
docs/demos/cut_accurate.gifasset169,175 bytes
docs/demos/cut_edit_list.gifasset172,269 bytes
docs/demos/cut_remove.gifasset165,570 bytes
docs/demos/deinterlace.gifasset230,026 bytes
docs/demos/delogo.gifasset243,761 bytes
docs/demos/denoise.gifasset255,876 bytes
docs/demos/downmix_51.gifasset13,621 bytes
docs/demos/export_reels.gifasset197,557 bytes
docs/demos/filler_en.gifasset177,647 bytes
docs/demos/filler_korean.gifasset9,861 bytes
docs/demos/fit_blur.gifasset184,031 bytes
docs/demos/freeze_hold.gifasset226,696 bytes
docs/demos/greenscreen.gifasset236,324 bytes
docs/demos/grid_2x2.gifasset197,971 bytes
docs/demos/hdr_tonemap.gifasset192,072 bytes
docs/demos/insert_still.gifasset252,756 bytes
docs/demos/join_fade.gifasset203,232 bytes
docs/demos/join_fadeblack.gifasset203,232 bytes
docs/demos/logo_overlay.gifasset253,024 bytes
docs/demos/loop_times.gifasset199,497 bytes
docs/demos/loudness.gifasset13,015 bytes
docs/demos/lower_third.gifasset215,362 bytes
docs/demos/lower_third_hindi.gifasset213,711 bytes
docs/demos/metadata_auto_chapters.gifasset219,215 bytes
docs/demos/metadata_chapters.gifasset219,511 bytes
docs/demos/motion_centre_crop.gifasset35,248 bytes
docs/demos/multicam_switch.gifasset232,232 bytes
docs/demos/multicam_switch_energy.gifasset217,926 bytes
docs/demos/overlay_place.gifasset172,094 bytes
docs/demos/pad_timeline.gifasset254,443 bytes
docs/demos/proxy.gifasset148,909 bytes
docs/demos/redact_blur.gifasset168,407 bytes
docs/demos/reframe_crop.gifasset199,423 bytes
docs/demos/reframe_pad.gifasset197,828 bytes
docs/demos/reframe_talk.gifasset179,047 bytes
docs/demos/render_pip.gifasset223,728 bytes
docs/demos/render_project.gifasset172,530 bytes
docs/demos/reverse.gifasset214,530 bytes
docs/demos/scenes_highlights.gifasset217,820 bytes
docs/demos/scenes_shots.gifasset216,949 bytes
docs/demos/sequence_frames.gifasset182,062 bytes
docs/demos/silence_removal.gifasset209,051 bytes
docs/demos/silence_speech_aware.gifasset13,048 bytes
docs/demos/speed_up.gifasset199,080 bytes
docs/demos/speedramp.gifasset147,702 bytes
docs/demos/sphere_flat.gifasset206,662 bytes
docs/demos/stabilize.gifasset199,986 bytes
docs/demos/straighten.gifasset149,112 bytes
docs/demos/sync_mic.gifasset12,819 bytes
docs/demos/template_tiktok.gifasset195,829 bytes
docs/demos/title_card.gifasset118,758 bytes
docs/demos/waveform_render.gifasset184,706 bytes
docs/design-decisions.mddoc209,059 bytes
docs/roadmap.mddoc61,767 bytes
evals/README.mddoc21,940 bytes
evals/agent_prompts.jsonasset1,943 bytes
evals/agent_prompts_24.jsonasset47,138 bytes
evals/agent_prompts_25.jsonasset2,554 bytes
evals/agent_prompts_26.jsonasset3,642 bytes
evals/agent_prompts_audio.jsonasset1,389 bytes
evals/agent_prompts_audio2.jsonasset1,793 bytes
evals/agent_prompts_exec.jsonasset3,369 bytes
evals/contract/README.mddoc986 bytes
evals/contract/check.pyruns3,203 bytes
evals/contract/questions.jsonasset2,668 bytes
evals/grade_runs.pyruns2,144 bytes
evals/grade_runs_24.pyruns23,151 bytes
evals/grade_runs_25.pyruns6,688 bytes
evals/results/audio-2.jsonasset1,167 bytes
evals/results/audio-only-1.jsonasset1,039 bytes
evals/results/contract-2026-09-04.jsonasset794 bytes
evals/results/corpus-2026-09-13-1.10.0.mddoc4,914 bytes
evals/results/exec-1.jsonasset1,980 bytes
evals/results/iteration-1.jsonasset1,440 bytes
evals/results/iteration-10-independent-grades.jsonasset18,119 bytes
evals/results/iteration-10.jsonasset8,961 bytes
evals/results/iteration-11-independent-grades.jsonasset13,693 bytes
evals/results/iteration-11.jsonasset11,960 bytes
evals/results/iteration-12-independent-grades.jsonasset11,557 bytes
evals/results/iteration-12.jsonasset9,775 bytes
evals/results/iteration-13-independent-grades.jsonasset14,611 bytes
evals/results/iteration-13.jsonasset7,379 bytes
evals/results/iteration-14-independent-grades.jsonasset27,247 bytes
evals/results/iteration-14.jsonasset9,964 bytes
evals/results/iteration-15-independent-grades.jsonasset21,515 bytes
evals/results/iteration-15.jsonasset9,527 bytes
evals/results/iteration-16-independent-grades.jsonasset28,813 bytes
evals/results/iteration-16.jsonasset15,637 bytes
evals/results/iteration-17-independent-grades.jsonasset41,327 bytes
evals/results/iteration-17.jsonasset18,790 bytes
evals/results/iteration-18-independent-grades.jsonasset22,163 bytes
evals/results/iteration-18.jsonasset21,184 bytes
evals/results/iteration-19-independent-grades.jsonasset24,846 bytes
evals/results/iteration-19.jsonasset19,205 bytes
evals/results/iteration-2-4-independent-grades.jsonasset24,897 bytes
evals/results/iteration-2-4.jsonasset1,648 bytes
evals/results/iteration-2.jsonasset1,545 bytes
evals/results/iteration-20-independent-grades.jsonasset7,677 bytes
evals/results/iteration-20.jsonasset11,200 bytes
evals/results/iteration-21.jsonasset6,820 bytes
evals/results/iteration-22.jsonasset10,382 bytes
evals/results/iteration-23-partial.jsonasset5,005 bytes
evals/results/iteration-23b.jsonasset6,070 bytes
evals/results/iteration-23b/ff1/with_skill/outputs/run.mddoc1,348 bytes
evals/results/iteration-23b/kw1/with_skill/outputs/run.mddoc2,418 bytes
evals/results/iteration-24.jsonasset3,107 bytes
evals/results/iteration-24/h1/with_skill/outputs/run.mddoc2,107 bytes
evals/results/iteration-24/h2/with_skill/outputs/run.mddoc3,314 bytes
evals/results/iteration-24/ow1/with_skill/outputs/run.mddoc3,460 bytes
evals/results/iteration-24/ow2/with_skill/outputs/run.mddoc2,249 bytes
evals/results/iteration-24/q1/with_skill/outputs/run.mddoc2,526 bytes
evals/results/iteration-25.jsonasset5,822 bytes
evals/results/iteration-5.jsonasset3,640 bytes
evals/results/iteration-6.jsonasset3,819 bytes
evals/results/iteration-7-independent-grades.jsonasset32,094 bytes
evals/results/iteration-7.jsonasset7,789 bytes
evals/results/iteration-8-independent-grades.jsonasset32,126 bytes
evals/results/iteration-8.jsonasset12,309 bytes
evals/results/iteration-9-independent-grades.jsonasset35,873 bytes
evals/results/iteration-9.jsonasset13,437 bytes
evals/results/routing-skill-md-restructure.jsonasset17,167 bytes
evals/run.pyruns7,121 bytes
evals/run_agents_25.shruns1,245 bytes
evals/tasks.jsonasset4,646 bytes
evals/trigger/README.mddoc3,952 bytes
evals/trigger/prompts.jsonasset8,841 bytes
evals/trigger/prompts_25.jsonasset626 bytes
evals/trigger/results-2026-09-04.jsonasset5,624 bytes
evals/trigger/results-2026-09-11.jsonasset6,665 bytes
evals/trigger/results-2026-09-12-it7.jsonasset6,494 bytes
evals/trigger/results-2026-09-12-it8.jsonasset5,724 bytes
evals/trigger/results-2026-09-12-it9.jsonasset5,799 bytes
evals/trigger/results-2026-09-12.jsonasset6,461 bytes
evals/trigger/results-2026-09-13-it10.jsonasset5,800 bytes
evals/trigger/results-2026-09-13-it11.jsonasset5,818 bytes
evals/trigger/results-2026-09-13-it12.jsonasset5,818 bytes
evals/trigger/results-2026-09-13-it13.jsonasset7,981 bytes
evals/trigger/results-2026-09-13-it14.jsonasset9,524 bytes
evals/trigger/results-2026-09-13-it15.jsonasset9,517 bytes
evals/trigger/results-2026-09-13-it16.jsonasset10,119 bytes
evals/trigger/results-2026-09-14-it17.jsonasset11,370 bytes
evals/trigger/results-2026-09-14-it18.jsonasset12,579 bytes
evals/trigger/results-2026-09-14-it19.jsonasset12,539 bytes
evals/trigger/results-2026-09-14-it20.jsonasset14,355 bytes
evals/trigger/results-2026-09-24-it25.jsonasset720 bytes
evals/trigger/results-2026-10-31.jsonasset606 bytes
evals/write_fixtures.pyruns10,140 bytes
examples/README.mddoc10,175 bytes
examples/brand.jsonasset500 bytes
examples/make_demo.shruns6,220 bytes
mcp/server.pyruns12,141 bytes
package.jsonruns2,117 bytes
references/ci-platform-pitfalls.mddoc14,183 bytes
references/devices.mddoc3,072 bytes
references/flags.mddoc2,170 bytes
references/gotchas.mddoc25,808 bytes
references/process-pitfalls.mddoc16,946 bytes
references/report.mddoc2,827 bytes
references/requests.mddoc12,621 bytes
references/scripts.mddoc138,817 bytes
references/timestamps.mddoc411 bytes
references/workflow.mddoc9,009 bytes
scripts/_ass_overlay.pyruns7,770 bytes
scripts/_common/__init__.pyruns17,029 bytes
scripts/_common/asr.pyruns63,447 bytes
scripts/_common/color.pyruns16,414 bytes
scripts/_common/decision.pyruns76,547 bytes
scripts/_common/drawtext.pyruns14,625 bytes
scripts/_common/emit.pyruns46,677 bytes
scripts/_common/emoji.pyruns16,647 bytes
scripts/_common/fonts.pyruns30,531 bytes
scripts/_common/probe.pyruns51,915 bytes
scripts/_common/runner.pyruns100,582 bytes
scripts/_common/text.pyruns3,990 bytes
scripts/_common/timeline.pyruns31,230 bytes
scripts/_common/wrap.pyruns42,348 bytes
scripts/_contract.pyruns177,735 bytes
scripts/_platforms.pyruns12,700 bytes
scripts/audio.pyruns27,247 bytes
scripts/background.pyruns4,652 bytes
scripts/batch.pyruns42,305 bytes
scripts/broll.pyruns9,882 bytes
scripts/caption.pyruns100,798 bytes
scripts/check.pyruns32,184 bytes
scripts/color.pyruns30,506 bytes
scripts/crop.pyruns3,835 bytes
scripts/cropdetect.pyruns10,272 bytes
scripts/cut.pyruns104,392 bytes
scripts/deinterlace.pyruns4,084 bytes
scripts/denoise.pyruns4,871 bytes
scripts/export.pyruns40,170 bytes
scripts/fit.pyruns14,316 bytes
scripts/freeze.pyruns6,524 bytes
scripts/graphics.pyruns47,003 bytes
scripts/grid.pyruns10,344 bytes
scripts/insert.pyruns6,094 bytes
scripts/join.pyruns51,016 bytes
scripts/look.pyruns16,561 bytes
scripts/loop.pyruns8,393 bytes
scripts/loudness.pyruns12,880 bytes
scripts/metadata.pyruns15,027 bytes
scripts/multicam.pyruns18,188 bytes
scripts/overlay.pyruns31,422 bytes
scripts/pad.pyruns4,455 bytes
scripts/probe.pyruns2,733 bytes
scripts/proxy.pyruns3,793 bytes
scripts/redact.pyruns7,504 bytes
scripts/render.pyruns98,519 bytes
scripts/report.pyruns17,253 bytes
scripts/reverse.pyruns2,443 bytes
scripts/scenes.pyruns17,776 bytes
scripts/sequence.pyruns7,133 bytes
scripts/silence.pyruns39,173 bytes
scripts/speedramp.pyruns6,131 bytes
scripts/sphere.pyruns7,302 bytes
scripts/stabilize.pyruns5,338 bytes
scripts/straighten.pyruns5,342 bytes
scripts/sync.pyruns22,937 bytes
scripts/verify.pyruns14,201 bytes
scripts/waveform.pyruns21,826 bytes
site/brand/apple-touch-icon.pngasset2,042 bytes
site/brand/favicon.icoasset2,126 bytes
site/brand/favicon.svgasset672 bytes
site/brand/ffmpeg-skill-horizontal-on-dark.svgasset8,361 bytes
site/brand/ffmpeg-skill-symbol-on-dark.svgasset678 bytes
site/brand/og.pngasset101,199 bytes
site/brand/velisa-horizontal-on-dark.svgasset8,641 bytes
site/brand/velisa-horizontal.svgasset8,641 bytes
site/index.htmlasset53,066 bytes
site/media/filler_en.jpgasset45,708 bytes
site/media/filler_en.mp4asset1,375,647 bytes
site/media/reframe_talk.jpgasset35,284 bytes
site/media/reframe_talk.mp4asset1,165,539 bytes
templates/audiogram.jsonasset461 bytes
templates/facebook.jsonasset702 bytes
templates/linkedin.jsonasset702 bytes
templates/podcast.jsonasset310 bytes
templates/reels.jsonasset686 bytes
templates/shorts.jsonasset689 bytes
templates/tiktok.jsonasset689 bytes
templates/x.jsonasset681 bytes
templates/youtube-shorts.jsonasset697 bytes
templates/youtube.jsonasset699 bytes
tests/_fixtures.pyruns24,525 bytes
tests/bench_scenes.pyruns5,158 bytes
tests/bench_silence.pyruns5,738 bytes
tests/bench_sync.pyruns6,968 bytes
tests/bench_vt.pyruns11,240 bytes
tests/corpus.pyruns10,059 bytes
tests/fixtures/README.mddoc2,619 bytes
tests/fixtures/caption_1_16_1_fitsize_off.assasset916 bytes
tests/fixtures/ffmpeg_bsfs_6.1.txtdoc608 bytes
tests/fixtures/ffmpeg_bsfs_8.1.2_macos.txtdoc695 bytes
tests/fixtures/ffmpeg_bsfs_9.0.1_windows.txtdoc759 bytes
tests/fixtures/ffmpeg_encoders_6.1.txtdoc13,199 bytes
tests/fixtures/ffmpeg_encoders_6.1_no_aac.txtdoc13,142 bytes
tests/fixtures/ffmpeg_encoders_8.1.2_macos.txtdoc11,102 bytes
tests/fixtures/ffmpeg_encoders_9.0.1_windows.txtdoc13,322 bytes
tests/fixtures/ffmpeg_filters_6.1.txtdoc40,185 bytes
tests/fixtures/ffmpeg_filters_7.1_constructed.txtdoc40,185 bytes
tests/fixtures/ffmpeg_filters_8.1.2_macos.txtdoc34,502 bytes
tests/fixtures/ffmpeg_filters_9.0.1_windows.txtdoc38,394 bytes
tests/fixtures/ffmpeg_filters_garbage.txtdoc75 bytes
tests/fixtures/mcp_tools.jsonasset16,897 bytes
tests/release_check.shruns6,616 bytes
tests/run_parallel.pyruns6,214 bytes
tests/test_accel.pyruns84,671 bytes
tests/test_all.pyruns1,596 bytes
tests/test_analysis.pyruns88,849 bytes
tests/test_asr.pyruns77,684 bytes
tests/test_audio.pyruns52,433 bytes
tests/test_contract.pyruns447,561 bytes
tests/test_cut_copy.pyruns134,296 bytes
tests/test_delivery.pyruns42,174 bytes
tests/test_editing.pyruns183,774 bytes
tests/test_orchestration.pyruns164,492 bytes
tests/test_picture.pyruns315,741 bytes

Read SKILL.md


# ffmpeg-skill

## Quick start

Run `python3 <skill-dir>/scripts/<name>.py`; the table below routes requests, `--help` lists every flag.
MCP `tools/list` shows the core 12; the other 30 of the 42 tools stay callable by name.

Shared flags (the rest, codec defaults and `--hw`: `references/flags.md`):
`--dry-run` (plan, write nothing), `--json` (output, probe, commands), `--json-brief` (status + `summary`),
`--overwrite` (step 7), `--timeout SECONDS` (default 1800, `0` = none; `kind: timeout`).

Writing tools run nothing under `--dry-run`; the measuring tools (`probe`, `check`, `sync`, `multicam`,
`scenes`, `cropdetect`, `report`, `silence`, `loudness`, `stabilize`, `overlay`) may still run
ffmpeg/ffprobe without writing artifacts; `verify` ignores the flag. Per tool: `contract --json` `dry_run`.

View the complete source on GitHub

Skills included

ffmpeg-skill

Repository facts

License: MIT
Created: Sep 3, 2026
Last pushed: Nov 6, 2026
Forks: 371
Open issues: 17
Project activity: Active

Rank over the last 12 weeks

Now #293 · best #292 · up 174 in 30 days

#300 on Oct 30
#298 on Oct 31
#296 on Nov 1
#292 from Nov 2 to Nov 3
#295 on Nov 4
#293 since Nov 5

53 earlier periods

#890 on Aug 30
#884 on Sep 4
#859 on Sep 5
#890 on Sep 6
#912 on Sep 7
#756 on Sep 8
#681 on Sep 9
#664 on Sep 10
#639 on Sep 11
#627 on Sep 12
#618 on Sep 13
#625 on Sep 14
#617 on Sep 15
#623 on Sep 16
#617 on Sep 17
#587 on Sep 18
#542 on Sep 19
#536 on Sep 20
#533 on Sep 21
#540 on Sep 22
#530 on Sep 23
#517 on Sep 24
#515 on Sep 25
#513 on Sep 26
#529 from Sep 27 to Sep 28
#546 on Sep 29
#534 on Sep 30
#527 on Oct 1
#526 on Oct 2
#503 on Oct 3
#464 on Oct 4
#456 on Oct 5
#462 on Oct 6
#467 on Oct 7
#475 on Oct 8
#477 on Oct 9
#471 on Oct 10
#474 on Oct 11
#483 on Oct 12
#481 from Oct 13 to Oct 14
#479 on Oct 15
#482 on Oct 16
#470 on Oct 17
#474 on Oct 18
#482 on Oct 19
#483 on Oct 20
#487 on Oct 21
#479 on Oct 22
#464 on Oct 23
#404 on Oct 24
#420 on Oct 25
#339 on Oct 28
#305 on Oct 29

Before you install

Network or broad shell

Automated signals, not a guarantee

Checked Nov 5, 2026

Not fully analyzed: some files were too long, unreadable or missing. This never lowers the level.

Show 9 notes

CHANGELOG.md:694 Analysis incomplete: physical or joined line exceeds character limit
CHANGELOG.md:696 Analysis incomplete: physical or joined line exceeds character limit
SKILL.md:1 Analysis incomplete: Referenced executable target unavailable; not analyzed
SKILL.md:1 Analysis incomplete: Referenced executable target unavailable; not analyzed
brand/logo/ffmpeg-skill-wordmark-black.svg:1 Analysis incomplete: physical or joined line exceeds character limit
brand/logo/ffmpeg-skill-wordmark-white.svg:1 Analysis incomplete: physical or joined line exceeds character limit
site/brand/ffmpeg-skill-horizontal-on-dark.svg:1 Analysis incomplete: physical or joined line exceeds character limit
site/brand/velisa-horizontal-on-dark.svg:1 Analysis incomplete: physical or joined line exceeds character limit
site/brand/velisa-horizontal.svg:1 Analysis incomplete: physical or joined line exceeds character limit

No broad tool permissions
31 dangerous shell commandsin 15 files: .claude/skills/git-hygiene/SKILL.md:3 demos/CI.md:42 README.md:106 and 12 more
347 network referencesin 64 files: site/index.html:10 tests/corpus.py:23 CHANGELOG.md:212 and 61 more
2 obfuscation signalsin 2 files: scripts/_common/emoji.py:75 tests/test_picture.py:3567
No instruction overrides
95 executable scriptsin 95 files: .github/scripts/build_pages.py:1 .github/scripts/bump_contract_md.py:1 .github/scripts/bump_roadmap_md.py:1 and 92 more
165 references to secretsin 20 files: tests/test_contract.py:27 tests/test_picture.py:602 tests/test_accel.py:59 and 17 more
No requests to vote in Hot

Show all 640 signals by file

`.claude-plugin/marketplace.json`

Network accessline 4

"owner": {     "name": "kajisho5",     "url": "https://github.com/kajisho5"

Network accessline 5

"name": "kajisho5",     "url": "https://github.com/kajisho5"   },

Network accessline 6
```
"url": "https://github.com/kajisho5"
```

`.claude-plugin/plugin.json`

Network accessline 5

"author": {     "name": "kajisho5",     "url": "https://github.com/kajisho5"

Network accessline 6

"name": "kajisho5",     "url": "https://github.com/kajisho5"   },

Network accessline 7
```
"url": "https://github.com/kajisho5"
```

Network accessline 8

},   "homepage": "https://github.com/kajisho5/ffmpeg-skill",   "repository": "https://github.com/kajisho5/ffmpeg-skill",

Network accessline 9

"homepage": "https://github.com/kajisho5/ffmpeg-skill",

Network accessline 10

"repository": "https://github.com/kajisho5/ffmpeg-skill",

`.claude/skills/build-artifacts/SKILL.md`

Network accessline 182

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/ci-pipeline-synthesizer/SKILL.md`

Network accessline 114

- Use `actions/cache` for dependencies to reduce build times - Keep matrix versions current with language support policies - Add status badges to README.md: `![CI](https://github.com/user/repo/workflows/CI/badge.svg)`

Network accessline 116

- Add status badges to README.md: `![CI](https://github.com/user/repo/workflows/CI/badge.svg)`

`.claude/skills/concurrent-branches/SKILL.md`

Network accessline 244

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/cross-surface-changes/SKILL.md`

Network accessline 227

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/defect-reports/SKILL.md`

Network accessline 222

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/destructive-operations/SKILL.md`

Dangerous shell operationline 3

description: 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

Dangerous shell operationline 29

// `rm -rf --ignore-unmatch .`, keeping only the state files it rewrites.

Network accessline 211

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/git-hygiene/SKILL.md`

Dangerous shell operationline 3

description: 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

Dangerous shell operationline 23

git rm --cached path/to/file        # untrack, leave working-tree copy in place

Dangerous shell operationline 24

git rm -r --cached some/dir/        # for a directory

Dangerous shell operationline 62

2. **Untrack going forward** (`git rm --cached` + `.gitignore` + `.env.example`

Network accessline 93

# .pre-commit-config.yaml repos:   - repo: https://github.com/gitleaks/gitleaks

Network accessline 94

repos:   - repo: https://github.com/gitleaks/gitleaks     rev: v8.18.0

Network accessline 95

- repo: https://github.com/gitleaks/gitleaks

Network accessline 96

rev: v8.18.0     hooks: [{id: gitleaks}]   - repo: https://github.com/Yelp/detect-secrets

Network accessline 97

hooks: [{id: gitleaks}]   - repo: https://github.com/Yelp/detect-secrets     rev: v1.5.0

Network accessline 98

- repo: https://github.com/Yelp/detect-secrets

Access to secretsline 107
```
[Credential-related source omitted]
```
Access to secretsline 183
```
[Credential-related source omitted]
```

Dangerous shell operationline 188

- [ ] `git rm --cached` + .gitignore entry for each offending file

Network accessline 216

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/github-actions/SKILL.md`

Network accessline 49

run: |           set -euxo pipefail           curl -fsSL -o /tmp/sl.zip https://github.com/realm/SwiftLint/releases/download/0.65.0/swiftlint_linux_amd64.zip

Network accessline 50

set -euxo pipefail           curl -fsSL -o /tmp/sl.zip https://github.com/realm/SwiftLint/releases/download/0.65.0/swiftlint_linux_amd64.zip           unzip -oq /tmp/sl.zip -d /tmp/sl

Network accessline 51

curl -fsSL -o /tmp/sl.zip https://github.com/realm/SwiftLint/releases/download/0.65.0/swiftlint_linux_amd64.zip

Network accessline 52

unzip -oq /tmp/sl.zip -d /tmp/sl           sudo install -m0755 /tmp/sl/swiftlint-static /usr/local/bin/swiftlint           curl -fsSL -o /tmp/sf.zip https://github.com/nicklockwood/SwiftFormat/releases/download/0.62.1/swiftformat_linux.zip

Dangerous shell operationline 53

sudo install -m0755 /tmp/sl/swiftlint-static /usr/local/bin/swiftlint

Network accessline 53

sudo install -m0755 /tmp/sl/swiftlint-static /usr/local/bin/swiftlint           curl -fsSL -o /tmp/sf.zip https://github.com/nicklockwood/SwiftFormat/releases/download/0.62.1/swiftformat_linux.zip           unzip -oq /tmp/sf.zip -d /tmp/sf

Network accessline 54

curl -fsSL -o /tmp/sf.zip https://github.com/nicklockwood/SwiftFormat/releases/download/0.62.1/swiftformat_linux.zip

Dangerous shell operationline 56

sudo install -m0755 /tmp/sf/swiftformat_linux /usr/local/bin/swiftformat

Network accessline 62

which needs a Swift runtime the bare runner lacks) and SwiftFormat's `swiftformat_linux` — both are statically linked and run on plain `ubuntu-latest`. Pin versions in the URL, `curl -f` to fail on a bad download, and reference the

Network accessline 63

`swiftformat_linux` — both are statically linked and run on plain `ubuntu-latest`. Pin versions in the URL, `curl -f` to fail on a bad download, and reference the exact binary names rather than a fragile `find`.

Network accessline 64

Pin versions in the URL, `curl -f` to fail on a bad download, and reference the

Network accessline 317

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/mcp-server-design/SKILL.md`

Network accessline 286

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/release-management/SKILL.md`

Network accessline 37

[Unreleased]: https://github.com/user/repo/compare/v1.2.0...HEAD

Network accessline 38

[1.2.0]: https://github.com/user/repo/releases/tag/v1.2.0

Network accessline 147

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/reproducing-ci-locally/SKILL.md`

Network accessline 250

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.claude/skills/verifying-external-behavior/SKILL.md`

Network accessline 26

# The exact URL, including the collection-vs-item distinction curl -s -o /dev/null -w '%{http_code}\n' https://api.example.com/v1/things

Network accessline 27

curl -s -o /dev/null -w '%{http_code}\n' https://api.example.com/v1/things

Network accessline 28

curl -s -o /dev/null -w '%{http_code}\n' https://api.example.com/v1/things/1

Network accessline 217

Source: [wdm0006/python-skills](https://github.com/wdm0006/python-skills) (MIT).

`.github/ISSUE_TEMPLATE/config.yml`

Network accessline 2

contact_links:   - name: Security vulnerability     url: https://github.com/kajisho5/ffmpeg-skill/security/advisories/new

Network accessline 3

- name: Security vulnerability     url: https://github.com/kajisho5/ffmpeg-skill/security/advisories/new     about: Please report vulnerabilities privately (see SECURITY.md) instead of a public issue.

Network accessline 4

url: https://github.com/kajisho5/ffmpeg-skill/security/advisories/new

`.github/scripts/build_pages.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

Network accessline 27

ROOT = Path(__file__).resolve().parents[2] REPO_URL = "https://github.com/kajisho5/ffmpeg-skill"

Network accessline 28

REPO_URL = "https://github.com/kajisho5/ffmpeg-skill"

`.github/scripts/bump_contract_md.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`.github/scripts/bump_roadmap_md.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`.github/scripts/design_decisions_index.py`

Executable scriptline 1
```
Executable file
```

`.github/scripts/pages_layout.html`

Network accessline 8

<meta property="og:title" content="{{ page.title | default: site.title }}"> <meta property="og:description" content="{{ site.description }}"> <meta property="og:image" content="https://raw.githubusercontent.com/kajisho5/ffmpeg-skill/main/as

Network accessline 9

<meta property="og:description" content="{{ site.description }}"> <meta property="og:image" content="https://raw.githubusercontent.com/kajisho5/ffmpeg-skill/main/assets/social-preview.png"> <link rel="icon" href="{{ '/brand/app-icon.png' |

Network accessline 10

<meta property="og:image" content="https://raw.githubusercontent.com/kajisho5/ffmpeg-skill/main/assets/social-preview.png">

Network accessline 61

<a href="{{ '/docs/design-decisions.html' | relative_url }}">Design decisions</a>   <a href="{{ '/CHANGELOG.html' | relative_url }}">Changelog</a>   <a href="https://github.com/kajisho5/ffmpeg-skill">GitHub</a>

Network accessline 62

<a href="{{ '/CHANGELOG.html' | relative_url }}">Changelog</a>   <a href="https://github.com/kajisho5/ffmpeg-skill">GitHub</a> </div></nav>

Network accessline 63

<a href="https://github.com/kajisho5/ffmpeg-skill">GitHub</a>

Network accessline 66

{{ content }} </main> <footer>Generated from the repository's own Markdown by <code>.github/scripts/build_pages.py</code>. Source: <a href="https://github.com/kajisho5/ffmpeg-skill">kajisho5/ffmpeg-skill</a> · MIT</footer>

Network accessline 67

</main> <footer>Generated from the repository's own Markdown by <code>.github/scripts/build_pages.py</code>. Source: <a href="https://github.com/kajisho5/ffmpeg-skill">kajisho5/ffmpeg-skill</a> · MIT</footer> </body>

Network accessline 68

<footer>Generated from the repository's own Markdown by <code>.github/scripts/build_pages.py</code>. Source: <a href="https://github.com/kajisho5/ffmpeg-skill">kajisho5/ffmpeg-skill</a> · MIT</footer>

`.github/scripts/resolve_version.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 109
```
[Credential-related source omitted]
```
Access to secretsline 110
```
[Credential-related source omitted]
```
Access to secretsline 120
```
[Credential-related source omitted]
```

`.github/workflows/ci.yml`

Dangerous shell operationline 62

run: sudo apt-get update && sudo apt-get install -y ffmpeg fonts-dejavu-core

`.github/workflows/pages.yml`

Network accessline 1

# Publishes https://kajisho5.github.io/ffmpeg-skill/: the landing page in site/ plus the

`.github/workflows/release.yml`

Access to secretsline 131
```
[Credential-related source omitted]
```
Access to secretsline 132
```
[Credential-related source omitted]
```

Network accessline 272

with:           node-version: "20"           registry-url: "https://registry.npmjs.org"

Network accessline 274

registry-url: "https://registry.npmjs.org"

Access to secretsline 285
```
[Credential-related source omitted]
```

`.npmignore`

Network accessline 3

# SKILL.md, README.md and LICENSE -- this excludes junk *within* those directories that npm's own # default ignore list doesn't cover (unlike .gitignore, an .npmignore is honored even when "files" # is set, per npm's own docs: https://docs.

Network accessline 4

# default ignore list doesn't cover (unlike .gitignore, an .npmignore is honored even when "files" # is set, per npm's own docs: https://docs.npmjs.com/cli/v10/configuring-npm/package-json#files). __pycache__/

Network accessline 5

# is set, per npm's own docs: https://docs.npmjs.com/cli/v10/configuring-npm/package-json#files).

`.snyk`

Network accessline 1
```
# Snyk (https://snyk.io) policy file
```

`CHANGELOG.md`

Network accessline 212

- **An input or output with a protocol prefix is refused.** ffmpeg opens a value such as `tcp:...`, `http://...` or `file:...` as a URL, while the path guards (output-is-input, existing output, output directory) read it as a path. Every too

Network accessline 345

- **A project site on GitHub Pages.** `pages.yml` publishes https://kajisho5.github.io/ffmpeg-skill/ on every push to `main` that touches the docs. `.github/scripts/build_pages.py` assembles the site from the repository's own Markdown: the

Network accessline 498

- **`doctor` warns when the FFmpeg it runs is older than the upstream fix for a known high-severity CVE.** ffmpeg-skill does not ship FFmpeg, so a decoder bug in the installed build stays until the user upgrades it. `doctor --json` has a ne

Network accessline 609

- **A `render.py` project can carry a video layer (#326).** An `overlays[]` entry takes `"video": "webcam.mp4"` as a fourth kind next to `logo`/`image`/`text`, mapped to `overlay.py --video` with the same `position`/`scale`/`opacity`/`start

Network accessline 658

- **whisper.cpp transcripts are decoded with `-mc 0` (no previous-text context).** This is a decoding change for whisper.cpp users: `caption.py --transcribe` and `silence.py --filler --transcribe` pass `-mc 0` to the `whisper-cli` calls tha

Network accessline 703

- feat(cut): `reencode_reason` says why anything was re-encoded: a list of `requested`, `codec`, `vfr`, `vfr_inconclusive`, `pcm_container`, `copy_failed`, `tolerance`, `concat_fallback` in first-seen order, `[]` for a clean copy. `--segmen

Network accessline 704

- fix(cut): a `--segments` cut whose parts copied losslessly but whose join had to re-encode reported `mode: "copy"`, `reencoded: false` and `precision: "packet"`; it now reports `hybrid`, `reencoded: true`, the re-encode's precision and `c

Network accessline 705

- The `cut.py` work above, from `reencode_reason` and the `concat_fallback` report to the edit-list, HEVC and frame-timing paths and the exact `--segments` copy joins with their `join_check`, was built by [@rymalia](https://github.com/rymal

Network accessline 712

- feat: Parakeet speech engines, built by [@rymalia](https://github.com/rymalia) in #305. `parakeet-mlx` and `parakeet.cpp` (`parakeet-cli` + a `.gguf`) for `caption.py --transcribe` and `silence.py --filler --transcribe`; `--engine` / `FFM

Network accessline 724

- feat: opt-in Apple VideoToolbox encoding. `--hw`/`--no-hw` on every re-encoding tool and `export.py` (two booleans in the contract and MCP: `hw`, `no_hw`); `FFMPEG_SKILL_HW=1` makes it the default for everything but `export.py`'s delivery

Network accessline 2511

Thanks to [@willy92wins](https://github.com/willy92wins) for the detailed repro in #100.

Network accessline 2590

stream-copied (`-c:s:i copy` per existing index) ahead of the new one, whose own `-c:s`/ `-metadata:s:s:N` now target its real index instead of always `0`. Closes [#93](https://github.com/kajisho5/ffmpeg-skill/issues/93).

Network accessline 2592

[#93](https://github.com/kajisho5/ffmpeg-skill/issues/93).

Network accessline 2613

in 0.12.0. `--json` gains `dropped_non_av_streams` (`true` only when that fallback was actually   needed), matching the field name `--retag` already introduced. - **Deliberately left as-is, tracked in [#91](https://github.com/kajisho5/ffmpe

Network accessline 2614

needed), matching the field name `--retag` already introduced. - **Deliberately left as-is, tracked in [#91](https://github.com/kajisho5/ffmpeg-skill/issues/91):**   `caption.py`'s burn mode (whether a pre-existing embedded subtitle should

Network accessline 2615

- **Deliberately left as-is, tracked in [#91](https://github.com/kajisho5/ffmpeg-skill/issues/91):**

Network accessline 2682

implicit "best stream" heuristic, which for audio favours channel count over track order).   `join.py`/`multicam.py` are out of scope — they combine separate input files, a different   problem shape. Closes [#62](https://github.com/kajisho5

Network accessline 2683

`join.py`/`multicam.py` are out of scope — they combine separate input files, a different   problem shape. Closes [#62](https://github.com/kajisho5/ffmpeg-skill/issues/62) (the same gap   `caption.py`/`audio.py` already closed in [#55](http

Network accessline 2684

problem shape. Closes [#62](https://github.com/kajisho5/ffmpeg-skill/issues/62) (the same gap

Network accessline 2685

`caption.py`/`audio.py` already closed in [#55](https://github.com/kajisho5/ffmpeg-skill/issues/55)).

Network accessline 2746

since ffmpeg never runs). `--json` was never affected by any of this — it always omitted the   placeholder; only a dry-run's human-readable summary line could echo the fake number. Closes   [#77](https://github.com/kajisho5/ffmpeg-skill/iss

Network accessline 2748

[#77](https://github.com/kajisho5/ffmpeg-skill/issues/77).

Network accessline 2750

- **`probe.py`: `subtitle_stream_details`.** `subtitle_streams` was a plain integer count while `audio_streams` was already a detailed array, so nothing could tell which subtitle index was which language on a multi-track input (e.g. an MKV

Network accessline 2751

- **`caption.py --audio-stream N`: explicit multi-audio-track selection.** Confirmed `caption.py` did silently pick a track on a multi-audio-track input (dubbed languages, M&E stems): burn mode had no `-map` at all (ffmpeg's own automatic s

Network accessline 2752

- **`caption.py --text`: SMPTE non-drop-frame timecode cues.** Cues were positioned by decimal seconds only; broadcast-style deliverables often supply cue timing as `hh:mm:ss:ff` frame timecode instead. `--text` cue lines now also accept th

Network accessline 2753

- **`references/process-pitfalls.md`: development-process mistakes already made once.** Distinct from `references/ci-platform-pitfalls.md` (ffmpeg/CI behaviour differences): this is about the process of making a change safely, not FFmpeg it

Network accessline 2754

- **`doctor --json`: `gpu_encoders`.** No tool here uses GPU-accelerated encoding — every tool assumes CPU x264/x265 — but `doctor` had no way to answer "is GPU encoding available on this machine" at all, unlike every other capability it al

Network accessline 2755

- **`caption.py --mode mux`: soft subtitle stream instead of burn-in.** Every caption call previously re-encoded both streams to render pixels (`reencodes_video`/`reencodes_audio`: `"always"`) even when the caller only wanted a subtitle tra

Network accessline 2756

- **Test: the prose tool count in README/`docs/contract.md`/`package.json` is now checked against the real tool list.** 0.11.0 was cut to fix exactly this drift (README said 28 twice and 22 once; `package.json` said 21) by hand, with nothin

Network accessline 2766

Closes the video-editing-skill ADR-002/ADR-003 gap investigation (11 confirmed gaps): `crop.py`, `insert.py` (incl. Ken Burns), `fit.py --rotate`/`--flip`, `overlay.py --video`/`--chromakey` (video-on-video PiP, chroma key), `reverse.py`, `

Network accessline 2768

- **SKILL.md: two more worked examples of the mechanical-vs-judgement line.** "What this skill does and does not decide" already named categories (which cut is right, highlight ranking, thumbnails, content understanding) but not the line it

`CODE_OF_CONDUCT.md`

Network accessline 3

This project follows the [Contributor Covenant](https://www.contributor-covenant.org/version/2/1/code_of_conduct/), version 2.1.

`CONTRIBUTING.md`

Network accessline 43

git clone https://github.com/kajisho5/ffmpeg-skill

`README.md`

Network accessline 22

<a href="#tools">Tools</a> ·   <a href="#mcp">MCP</a> ·   <a href="https://www.npmjs.com/package/ffmpeg-skill">npm</a>

Network accessline 23

<a href="#mcp">MCP</a> ·   <a href="https://www.npmjs.com/package/ffmpeg-skill">npm</a> </p>

Network accessline 24

<a href="https://www.npmjs.com/package/ffmpeg-skill">npm</a>

Network accessline 27

<p align="center">   <a href="https://github.com/kajisho5/ffmpeg-skill/actions/workflows/ci.yml"><img src="https://github.com/kajisho5/ffmpeg-skill/actions/workflows/ci.yml/badge.svg" alt="tests"></a>

Network accessline 28

<a href="https://github.com/kajisho5/ffmpeg-skill/actions/workflows/ci.yml"><img src="https://github.com/kajisho5/ffmpeg-skill/actions/workflows/ci.yml/badge.svg" alt="tests"></a>

Network accessline 29

<a href="https://www.npmjs.com/package/ffmpeg-skill"><img src="https://img.shields.io/npm/v/ffmpeg-skill" alt="npm"></a>

Network accessline 30

<a href="#ffmpeg-compatibility"><img src="https://img.shields.io/badge/ffmpeg-6.1%20%7C%207.1%20%7C%208%20%7C%209%20tested-orange" alt="FFmpeg 6.1, 7.1, 8 and 9 tested in CI"></a>

Network accessline 31

<a href="LICENSE"><img src="https://img.shields.io/badge/license-MIT-green" alt="MIT"></a>

Network accessline 32

<a href="https://github.com/sponsors/kajisho5"><img src="https://img.shields.io/badge/sponsor-%E2%9D%A4-ea4aaa?logo=githubsponsors" alt="Sponsor"></a>

Network accessline 52

`ffmpeg-skill` is an [Agent Skill](https://docs.anthropic.com/en/docs/agents-and-tools/agent-skills) for Claude Code, Cursor, Codex and any agent that reads `SKILL.md`. It teaches the agent a fixed workflow (probe → edit losslessly where po

Network accessline 68

**In [kajisho5](https://github.com/kajisho5)'s wider video-production ecosystem**, this repo is the *hands*: it cuts, measures and exports files, and reports back in structured JSON. It does not decide what to cut, whether a deliverable is

Network accessline 71

|---|---| | Cut / join / measure / export a file right now | **this repo** (`ffmpeg-skill`), standalone | | Decide cut points, approve a deliverable, plan a whole edit | [`video-production-agent`](https://github.com/kajisho5/video-productio

Network accessline 72

| Cut / join / measure / export a file right now | **this repo** (`ffmpeg-skill`), standalone | | Decide cut points, approve a deliverable, plan a whole edit | [`video-production-agent`](https://github.com/kajisho5/video-production-agent) /

Network accessline 73

| Decide cut points, approve a deliverable, plan a whole edit | [`video-production-agent`](https://github.com/kajisho5/video-production-agent) / [`AI-video-production-OS`](https://github.com/kajisho5/AI-video-production-OS) |

Network accessline 74

| Build a typed editing graph across a workspace, without writing raw `ffmpeg` | [`video-editing-skill`](https://github.com/kajisho5/video-editing-skill) / [`audio-production-skill`](https://github.com/kajisho5/audio-production-skill) |

Network accessline 75

| Put Remotion motion graphics (animated captions, silence jump cuts, audio-peak motion) on a real recording | [`remotion-ffmpeg-skill`](https://github.com/kajisho5/remotion-ffmpeg-skill): its compositions take their length, fps, frame, sil

Network accessline 77

Other repos in the ecosystem — [`media-analysis-skill`](https://github.com/kajisho5/media-analysis-skill), [`transcription-skill`](https://github.com/kajisho5/transcription-skill), [`subtitle-skill`](https://github.com/kajisho5/subtitle-ski

Network accessline 100

Kajiyama, S. (2026). *What Is Verification-Driven Coding? — A Discipline for Not Trusting Generation.* Zenodo. https://doi.org/10.5281/zenodo.23720216

Dangerous shell operationline 106
```
sudo apt install ffmpeg
```

Network accessline 199

2. **Lossless when possible.** `cut.py` and `loudness.py` stream-copy what they do not need to touch (`join.py` re-encodes so it can crossfade and conform mismatched clips; `--copy --transition none` joins clips that already match by stream

Network accessline 200

3. **Plan before render.** Every tool takes `--dry-run` (print the ffmpeg command lines, write nothing), `--plan FILE` (the dry run saved as a plan with fingerprinted inputs that `render.py FILE` executes later, refusing if an input changed

Network accessline 201

4. **Machine-readable contract.** `contract --json` describes all 42 tools: input schema generated from the parser, output schema, role, required and conditional FFmpeg capabilities, dry-run support, the verification tools to run afterwards

Network accessline 303

**SPEC** (Self-Producing Execution Contract) is the name this project's author, [kajisho5](https://github.com/kajisho5), gave the pattern the tool layer is built on: each tool's

Network accessline 304

[kajisho5](https://github.com/kajisho5), gave the pattern the tool layer is built on: each tool's

Network accessline 381

`doctor` also compares the FFmpeg version with a small, dated table of high-severity FFmpeg CVEs (`doctor --json`'s `ffmpeg_security`; source [ffmpeg.org/security.html](https://ffmpeg.org/security.html), checked 2026-10-22). ffmpeg-skill do

Dangerous shell operationline 440

Every command a tool ran is in its `--json` `commands`, shell-quoted so it can be pasted and run again, and `--dry-run` prints the commands without running anything. In the 100-prompt agent eval (1.17.0, [Tested on real footage](#tested-on-

Network accessline 465

ffmpeg-skill edits footage you already have, on this machine, with FFmpeg tools whose flags are a machine-readable contract (`contract --json`). Remotion renders a video from React components. They complement each other: this repository doe

Network accessline 504

(`tests/corpus.py`) has been run on Linux and macOS; the full corpus has **not** been run on Windows yet, and neither has an install by someone other than the maintainer been reproduced there — [issue #143](https://github.com/kajisho5/ffmpe

Network accessline 505

Windows yet, and neither has an install by someone other than the maintainer been reproduced there — [issue #143](https://github.com/kajisho5/ffmpeg-skill/issues/143) tracks both. Treat the numbers below as measured on Linux (and, where sta

Network accessline 506

there — [issue #143](https://github.com/kajisho5/ffmpeg-skill/issues/143) tracks both. Treat the

Dangerous shell operationline 613

| Ubuntu / Debian | `sudo apt install ffmpeg` |

Network accessline 675

If this skill saves you time, you can help keep it maintained through [GitHub Sponsors](https://github.com/sponsors/kajisho5). Issues and pull requests are just as welcome.

`SKILL.md`

Network accessline 60

- **Thumbnail or cover composition**, and **what a video is *about*** (`look.py` is for the agent's eyes). - **Judging what looks good** — a LUT is mechanical; "cinematic" belongs to   [`color-grading-skill`](https://github.com/kajisho5/col

Network accessline 61

- **Judging what looks good** — a LUT is mechanical; "cinematic" belongs to   [`color-grading-skill`](https://github.com/kajisho5/color-grading-skill), which then calls `color.py`. - **The words in a caption** — burned as written; never rew

Network accessline 62

[`color-grading-skill`](https://github.com/kajisho5/color-grading-skill), which then calls `color.py`.

`bin/install.js`

Executable scriptline 1
```
#!/usr/bin/env node
```

Dangerous shell operationline 150

console.warn('    Ubuntu:  sudo apt install ffmpeg');

`brand/ffmpeg-skill.icon/Assets/in-out.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024"><defs><linearGradient id="g" x1="0" y1="0" x2="0" y2="1"><stop offset="0" stop-color="#FFFFFF"/><stop offset="1" stop-color="#FFFFFF" stop-opacity=".78"/></linearGradient></def

`brand/ffmpeg-skill.icon/Assets/playhead.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024"><defs><linearGradient id="g" x1="0" y1="0" x2="0" y2="1"><stop offset="0" stop-color="#FFFFFF"/><stop offset="1" stop-color="#FFFFFF" stop-opacity=".78"/></linearGradient></def

`brand/logo/ffmpeg-skill-wordmark-black.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="-3 -1000 5814 1300" role="img" aria-label="ffmpeg-skill"><path fill="#111111" d="M111 0V-520Q111 -582 138.0 -631.5Q165 -681 215.5 -711.0Q266 -741 337 -741Q390 -741 430.0 -723.5Q470 -706 499 -

`brand/logo/ffmpeg-skill-wordmark-white.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="-3 -1000 5814 1300" role="img" aria-label="ffmpeg-skill"><path fill="#FFFFFF" d="M111 0V-520Q111 -582 138.0 -631.5Q165 -681 215.5 -711.0Q266 -741 337 -741Q390 -741 430.0 -723.5Q470 -706 499 -

`demos/CI.md`

Dangerous shell operationline 42
```
sudo apt-get update
```

Dangerous shell operationline 43

sudo apt-get install -y ffmpeg fonts-dejavu-core fonts-ipafont-gothic \

Dangerous shell operationline 96
```
sudo apt-get update
```

Dangerous shell operationline 97

sudo apt-get install -y ffmpeg fonts-dejavu-core fonts-ipafont-gothic \

Dangerous shell operationline 104

rm -f release_assets/*_before.mp4 release_assets/*_after.mp4

`demos/build.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 34
```
[Credential-related source omitted]
```

`demos/pages_videos.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`docs/contract.md`

Network accessline 529

high-severity FFmpeg CVEs and the first upstream release on each branch that carries the fix. The table is hand-maintained in `scripts/_contract.py` (`FFMPEG_ADVISORIES`), copied from <https://ffmpeg.org/security.html> and last checked on 2

Network accessline 530

hand-maintained in `scripts/_contract.py` (`FFMPEG_ADVISORIES`), copied from <https://ffmpeg.org/security.html> and last checked on 2026-10-22; the document repeats both as `source` and `checked`. Nothing is fetched: the check is offline, l

Network accessline 531

<https://ffmpeg.org/security.html> and last checked on 2026-10-22; the document repeats both as `source`

Network accessline 540

`{"source": "https://ffmpeg.org/security.html", "checked": "2026-10-22", "ffmpeg": {"version": "...", "status":

`docs/roadmap.md`

Dangerous shell operationline 481

from 1.17.2's eval (`cs2`, a break-at-the-column-edge escape for the 1.16.1 keep-the-run-whole

`evals/agent_prompts_24.json`

Network accessline 214

"id": "r03-download",     "lang": "en",     "prompt": "Download this YouTube video and make it a reel: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 215

"lang": "en",     "prompt": "Download this YouTube video and make it a reel: https://www.youtube.com/watch?v=dQw4w9WgXcQ",     "expect": [],

Network accessline 216

"prompt": "Download this YouTube video and make it a reel: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 251

"id": "c02",     "lang": "zh",     "prompt": "帮我把这个 YouTube 视频下载下来，剪成一条竖屏短视频存到 OUTDIR：https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 252

"lang": "zh",     "prompt": "帮我把这个 YouTube 视频下载下来，剪成一条竖屏短视频存到 OUTDIR：https://www.youtube.com/watch?v=dQw4w9WgXcQ",     "expect": [],

Network accessline 253

"prompt": "帮我把这个 YouTube 视频下载下来，剪成一条竖屏短视频存到 OUTDIR：https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 326

"id": "fr2",     "lang": "fr",     "prompt": "Télécharge cette vidéo YouTube et monte-la en format vertical dans OUTDIR : https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 327

"lang": "fr",     "prompt": "Télécharge cette vidéo YouTube et monte-la en format vertical dans OUTDIR : https://www.youtube.com/watch?v=dQw4w9WgXcQ",     "expect": [],

Network accessline 328

"prompt": "Télécharge cette vidéo YouTube et monte-la en format vertical dans OUTDIR : https://www.youtube.com/watch?v=dQw4w9WgXcQ",

`evals/contract/check.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`evals/grade_runs.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`evals/grade_runs_24.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`evals/grade_runs_25.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`evals/results/iteration-16-independent-grades.json`

Dangerous shell operationline 16

"encodes_delivery": "12 of 13 delivery runs took exactly one encoding pass; e11-ready took ZERO video encodes (loudness stream-copies video); j06-report again took TWO (export.py without --normalize, then rm and re-export). Identical to ite

Dangerous shell operationline 408

"reason": "x 12/0/0 on my re-run and report.html written; but this is the one run that still takes TWO encodes - export.py --preset x first, then rm and re-export with --normalize - and it is the one delivery run that never touches render.p

`evals/results/iteration-16.json`

Dangerous shell operationline 51

"encodes_delivery": "12 of 13 delivery runs took exactly one encoding pass; e11-ready took ZERO video encodes (loudness stream-copies video); j06-report again took TWO (export.py without --normalize, then rm and re-export). Identical to ite

`evals/run.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`evals/run_agents_25.sh`

Executable scriptline 1
```
#!/bin/sh
```

`evals/trigger/prompts.json`

Network accessline 105

"id": "n03",   "lang": "en",   "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 106

"lang": "en",   "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",   "should_trigger": false

Network accessline 107

"prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

`evals/trigger/results-2026-09-04.json`

Network accessline 114

"id": "n03",    "lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 115

"lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",    "should_trigger": false,

Network accessline 116

"prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

`evals/trigger/results-2026-09-11.json`

Network accessline 127

"id": "n03",    "lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 128

"lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",    "should_trigger": false,

Network accessline 129

"prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

`evals/trigger/results-2026-09-12-it7.json`

Network accessline 127

"id": "n03",    "lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 128

"lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",    "should_trigger": false,

Network accessline 129

"prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

`evals/trigger/results-2026-09-12-it8.json`

Network accessline 16

{"id": "n01","lang": "en","prompt": "Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger": false,"chosen": "image-tools","model": "sonnet","correct": true,"reason": "still image resize/transparency

Network accessline 17

{"id": "n02","lang": "ja","prompt": "Windows に ffmpeg をインストールする方法を教えて","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "install how-to, not an editing task"},   {"id": "n03","lang": "en","prompt"

Network accessline 18

{"id": "n03","lang": "en","prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "downloading a video, not edi

`evals/trigger/results-2026-09-12-it9.json`

Network accessline 16

{"id": "n01","lang": "en","prompt": "Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger": false,"chosen": "image-tools","model": "sonnet","correct": true,"reason": "still image resize/transparency

Network accessline 17

{"id": "n02","lang": "ja","prompt": "Windows に ffmpeg をインストールする方法を教えて","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "install how-to question, not an editing task on a file"},   {"id": "n03","l

Network accessline 18

{"id": "n03","lang": "en","prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "downloading from the web, no

`evals/trigger/results-2026-09-12.json`

Network accessline 127

"id": "n03",    "lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 128

"lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",    "should_trigger": false,

Network accessline 129

"prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

`evals/trigger/results-2026-09-13-it10.json`

Network accessline 16

{"id": "n01","lang": "en","prompt": "Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger": false,"chosen": "image-tools","model": "sonnet","correct": true,"reason": "still image resize/transparency

Network accessline 17

{"id": "n02","lang": "ja","prompt": "Windows に ffmpeg をインストールする方法を教えて","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "install how-to question, not an editing task on a file"},   {"id": "n03","l

Network accessline 18

{"id": "n03","lang": "en","prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "downloading from the web, no

`evals/trigger/results-2026-09-13-it11.json`

Network accessline 17

{"id": "n01","lang": "en","prompt": "Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger": false,"chosen": "image-tools","model": "sonnet","correct": true,"reason": "still image resize/transparency

Network accessline 18

{"id": "n02","lang": "ja","prompt": "Windows に ffmpeg をインストールする方法を教えて","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "install how-to question, not an editing task on a file"},   {"id": "n03","l

Network accessline 19

{"id": "n03","lang": "en","prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "downloading from the web, no

`evals/trigger/results-2026-09-13-it12.json`

Network accessline 17

{"id": "n01","lang": "en","prompt": "Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger": false,"chosen": "image-tools","model": "sonnet","correct": true,"reason": "still image resize/transparency

Network accessline 18

{"id": "n02","lang": "ja","prompt": "Windows に ffmpeg をインストールする方法を教えて","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "install how-to question, not an editing task on a file"},   {"id": "n03","l

Network accessline 19

{"id": "n03","lang": "en","prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "downloading from the web, no

`evals/trigger/results-2026-09-13-it13.json`

Network accessline 17

{"id": "n01","lang": "en","prompt": "Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger": false,"chosen": "image-tools","model": "sonnet","correct": true,"reason": "still image resize/transparency

Network accessline 18

{"id": "n02","lang": "ja","prompt": "Windows に ffmpeg をインストールする方法を教えて","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "install how-to question, not an editing task on a file"},   {"id": "n03","l

Network accessline 19

{"id": "n03","lang": "en","prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger": false,"chosen": "web-research","model": "sonnet","correct": true,"reason": "downloading from the web, no

`evals/trigger/results-2026-09-13-it14.json`

Network accessline 12

{"id":"n01","lang":"en","prompt":"Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger":false,"chosen":"image-tools","model":"sonnet","correct":true,"reason":"Still-image resize/transparency, not vi

Network accessline 13

{"id":"n02","lang":"ja","prompt":"Windows に ffmpeg をインストールする方法を教えて","should_trigger":false,"chosen":"none","model":"sonnet","correct":true,"reason":"Installation how-to, not an editing task."}, {"id":"n03","lang":"en","prompt":"Download thi

Network accessline 14

{"id":"n03","lang":"en","prompt":"Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger":false,"chosen":"web-research","model":"sonnet","correct":true,"reason":"Downloading online content, not loca

`evals/trigger/results-2026-09-13-it15.json`

Network accessline 17

{"id":"n01","lang":"en","prompt":"Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger":false,"chosen":"image-tools","model":"sonnet","correct":true,"reason":"Still image (PNG) resize, not video/aud

Network accessline 18

{"id":"n02","lang":"ja","prompt":"Windows に ffmpeg をインストールする方法を教えて","should_trigger":false,"chosen":"none","model":"sonnet","correct":true,"reason":"Install-instructions question, no media file or editing task"},   {"id":"n03","lang":"en","

Network accessline 19

{"id":"n03","lang":"en","prompt":"Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger":false,"chosen":"web-research","model":"sonnet","correct":true,"reason":"Downloading online content, not loca

`evals/trigger/results-2026-09-13-it16.json`

Network accessline 17

{"id":"n01","lang":"en","prompt":"Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger":false,"chosen":"image-tools","model":"sonnet","correct":true,"reason":"Still-image resize/transparency, not vi

Network accessline 18

{"id":"n02","lang":"ja","prompt":"Windows に ffmpeg をインストールする方法を教えて","should_trigger":false,"chosen":"none","model":"sonnet","correct":true,"reason":"Installation how-to question, not an edit request"},   {"id":"n03","lang":"en","prompt":"Do

Network accessline 19

{"id":"n03","lang":"en","prompt":"Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger":false,"chosen":"web-research","model":"sonnet","correct":true,"reason":"Downloading online content, no local

`evals/trigger/results-2026-09-14-it17.json`

Network accessline 17

{"id":"n01","lang":"en","prompt":"Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger":false,"chosen":"image-tools","model":"sonnet","correct":true,"reason":"Still-image resize/transparency, not vi

Network accessline 18

{"id":"n02","lang":"ja","prompt":"Windows に ffmpeg をインストールする方法を教えて","should_trigger":false,"chosen":"none","model":"sonnet","correct":true,"reason":"Install-instructions question, not an editing task."},   {"id":"n03","lang":"en","prompt":"

Network accessline 19

{"id":"n03","lang":"en","prompt":"Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger":false,"chosen":"web-research","model":"sonnet","correct":true,"reason":"Fetching/downloading online content,

`evals/trigger/results-2026-09-14-it18.json`

Network accessline 22

{"id":"n01","lang":"en","prompt":"Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger":false,"chosen":"image-tools","model":"sonnet","correct":true,"reason":"Still-image resize/transparency, not vi

Network accessline 23

{"id":"n02","lang":"ja","prompt":"Windows に ffmpeg をインストールする方法を教えて","should_trigger":false,"chosen":"none","model":"sonnet","correct":true,"reason":"Install-instructions question, not an editing task."},   {"id":"n03","lang":"en","prompt":"

Network accessline 24

{"id":"n03","lang":"en","prompt":"Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger":false,"chosen":"web-research","model":"sonnet","correct":true,"reason":"Fetching online content, not local e

`evals/trigger/results-2026-09-14-it19.json`

Network accessline 22

{"id":"n01","lang":"en","prompt":"Resize this PNG logo to 512x512 and make the background transparent: logo.png","should_trigger":false,"chosen":"image-tools","model":"sonnet","correct":true,"reason":"Still-image resize/transparency, not vi

Network accessline 23

{"id":"n02","lang":"ja","prompt":"Windows に ffmpeg をインストールする方法を教えて","should_trigger":false,"chosen":"none","model":"sonnet","correct":true,"reason":"Install-instructions question, not an editing task."},   {"id":"n03","lang":"en","prompt":"

Network accessline 24

{"id":"n03","lang":"en","prompt":"Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ","should_trigger":false,"chosen":"web-research","model":"sonnet","correct":true,"reason":"Fetching online content, not local e

`evals/trigger/results-2026-09-14-it20.json`

Network accessline 178

"id": "n03",    "lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

Network accessline 179

"lang": "en",    "prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",    "should_trigger": false,

Network accessline 180

"prompt": "Download this YouTube video for me: https://www.youtube.com/watch?v=dQw4w9WgXcQ",

`evals/write_fixtures.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`examples/make_demo.sh`

Executable scriptline 1
```
#!/usr/bin/env bash
```

`mcp/server.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 187
```
[Credential-related source omitted]
```

`package.json`

Executable scriptline 1
```
Executable file
```

Network accessline 29

"repository": {     "type": "git",     "url": "git+https://github.com/kajisho5/ffmpeg-skill.git"

Network accessline 30

"type": "git",     "url": "git+https://github.com/kajisho5/ffmpeg-skill.git"   },

Network accessline 31

"url": "git+https://github.com/kajisho5/ffmpeg-skill.git"

Network accessline 32

},   "homepage": "https://github.com/kajisho5/ffmpeg-skill#readme",   "bugs": "https://github.com/kajisho5/ffmpeg-skill/issues",

Network accessline 33

"homepage": "https://github.com/kajisho5/ffmpeg-skill#readme",

Network accessline 34

"bugs": "https://github.com/kajisho5/ffmpeg-skill/issues",

`references/process-pitfalls.md`

Dangerous shell operationline 63

Rule: a probe that runs `git commit`, `git tag`, `rm -rf`, or writes into the tree goes

`references/workflow.md`

Network accessline 43

- **Thumbnail or cover composition** — a design decision, not measurement. - **Understanding what a video is *about*** — there is no vision here beyond `look.py`'s contact sheets, for the calling agent's eyes, not for this skill to interpre

Network accessline 44

- **Understanding what a video is *about*** — there is no vision here beyond `look.py`'s contact sheets, for the calling agent's eyes, not for this skill to interpret. - **Judging what looks good** — "apply this LUT", "correct exposure by +

Network accessline 45

- **Judging what looks good** — "apply this LUT", "correct exposure by +0.3 stops" (`color.py`) is mechanical; "grade this scene to look cinematic" belongs to a colour-grading skill ([`color-grading-skill`](https://github.com/kajisho5/color

`scripts/_ass_overlay.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/_common/init.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/_common/asr.py`

Executable scriptline 1
```
Executable file
```
Access to secretsline 688
```
[Credential-related source omitted]
```
Access to secretsline 706
```
[Credential-related source omitted]
```
Access to secretsline 880
```
[Credential-related source omitted]
```
Access to secretsline 897
```
[Credential-related source omitted]
```
Access to secretsline 898
```
[Credential-related source omitted]
```
Access to secretsline 939
```
[Credential-related source omitted]
```

`scripts/_common/color.py`

Executable scriptline 1
```
Executable file
```

`scripts/_common/decision.py`

Executable scriptline 1
```
Executable file
```

`scripts/_common/drawtext.py`

Executable scriptline 1
```
Executable file
```

`scripts/_common/emit.py`

Executable scriptline 1
```
Executable file
```

`scripts/_common/emoji.py`

Executable scriptline 1
```
Executable file
```

Possible obfuscationline 75

a starter and never a tail on its own: `क्<U+200D>ष` (Hindi ka + virama + ZWJ + ssa) and `abc<U+200D>def`

Access to secretsline 291
```
[Credential-related source omitted]
```

`scripts/_common/fonts.py`

Executable scriptline 1
```
Executable file
```
Access to secretsline 57
```
[Credential-related source omitted]
```
Access to secretsline 357
```
[Credential-related source omitted]
```

`scripts/_common/probe.py`

Executable scriptline 1
```
Executable file
```

`scripts/_common/runner.py`

Executable scriptline 1
```
Executable file
```

Dangerous shell operationline 25

"  Debian/Ubuntu: sudo apt install ffmpeg\n"

Dangerous shell operationline 26

"  Fedora:        sudo dnf install ffmpeg\n"

Dangerous shell operationline 27

"  Arch:          sudo pacman -S ffmpeg"

Network accessline 30

"  winget install Gyan.FFmpeg\n"         "  or: choco install ffmpeg\n"         "  or download a build from https://ffmpeg.org/download.html and add it to PATH"

Network accessline 31

"  or: choco install ffmpeg\n"         "  or download a build from https://ffmpeg.org/download.html and add it to PATH"     ),

Network accessline 32

"  or download a build from https://ffmpeg.org/download.html and add it to PATH"

Access to secretsline 82
```
[Credential-related source omitted]
```
Access to secretsline 208
```
[Credential-related source omitted]
```
Access to secretsline 230
```
[Credential-related source omitted]
```

Network accessline 284

if found != (0, 0) and (found[0] < MIN_FFMPEG[0] or (_FFMPEG_VERSION_IS_RELEASE and found < MIN_FFMPEG)):             system = platform.system()             hint = INSTALL_HINTS.get(system, "  See https://ffmpeg.org/download.html")

Network accessline 285

system = platform.system()             hint = INSTALL_HINTS.get(system, "  See https://ffmpeg.org/download.html")             refuse("missing_tool", "ffmpeg_unsupported",

Network accessline 286

hint = INSTALL_HINTS.get(system, "  See https://ffmpeg.org/download.html")

Network accessline 292

return path     system = platform.system()     hint = INSTALL_HINTS.get(system, "  See https://ffmpeg.org/download.html")

Network accessline 293

system = platform.system()     hint = INSTALL_HINTS.get(system, "  See https://ffmpeg.org/download.html")     die(

Network accessline 294

hint = INSTALL_HINTS.get(system, "  See https://ffmpeg.org/download.html")

Access to secretsline 445
```
[Credential-related source omitted]
```
Access to secretsline 456
```
[Credential-related source omitted]
```
Access to secretsline 457
```
[Credential-related source omitted]
```
Access to secretsline 458
```
[Credential-related source omitted]
```

Network accessline 678

# A protocol prefix (`tcp:`, `http://`, `file:`, `concat:`, ...): ffmpeg opens such a value as a URL,

Access to secretsline 1145
```
[Credential-related source omitted]
```

`scripts/_common/text.py`

Executable scriptline 1
```
Executable file
```

`scripts/_common/timeline.py`

Executable scriptline 1
```
Executable file
```

`scripts/_common/wrap.py`

Executable scriptline 1
```
Executable file
```

`scripts/_contract.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

Network accessline 426

"output_path_taken": "two files one run writes (a side file and the output, or two side files) resolve to the same path, so the second would replace the first; details: {output, other}",     "output_looks_like_option": "the output starts wi

Network accessline 427

"output_looks_like_option": "the output starts with '-' (other than '-' for stdout), which ffmpeg would read as an option; ./name writes a file of that name; details: {output}",     "media_path_is_url": "an input or output has a protocol pr

Network accessline 428

"media_path_is_url": "an input or output has a protocol prefix (tcp:, http://, file:, ...) that ffmpeg would open as a URL; the skill reads and writes local files only; details: {path, scheme}",

Network accessline 912

# table and the local `-version` line only -- no network call, ever (execution.network: false). # # Source: https://ffmpeg.org/security.html (each release section lists the CVEs it fixes), checked

Network accessline 913

# # Source: https://ffmpeg.org/security.html (each release section lists the CVEs it fixes), checked # on FFMPEG_ADVISORIES_CHECKED. A branch absent from `fixed_in` had no release listed with the fix

Network accessline 914

# Source: https://ffmpeg.org/security.html (each release section lists the CVEs it fixes), checked

Network accessline 919

FFMPEG_ADVISORY_SOURCE = "https://ffmpeg.org/security.html"

Dangerous shell operationline 971

return "sudo apt update && sudo apt install --only-upgrade ffmpeg"

Network accessline 974

return "brew upgrade ffmpeg-full" if source == "homebrew-ffmpeg-full" else "brew upgrade ffmpeg, or the package manager it came from"     if system == "Windows":         return "winget upgrade Gyan.FFmpeg, or a newer build from https://ffmp

Network accessline 975

if system == "Windows":         return "winget upgrade Gyan.FFmpeg, or a newer build from https://ffmpeg.org/download.html"     if system == "Linux":

Network accessline 976

return "winget upgrade Gyan.FFmpeg, or a newer build from https://ffmpeg.org/download.html"

Network accessline 977

if system == "Linux":         return "your distribution's package update, e.g. sudo apt install --only-upgrade ffmpeg or sudo dnf upgrade ffmpeg"     return "a newer build from https://ffmpeg.org/download.html"

Dangerous shell operationline 978

return "your distribution's package update, e.g. sudo apt install --only-upgrade ffmpeg or sudo dnf upgrade ffmpeg"

Network accessline 979

return "a newer build from https://ffmpeg.org/download.html"

Network accessline 1117

result["note"] = ("drawtext renders with fontfile= (what every drawtext tool passes by default) but crashes "                               "when it has to resolve a font through fontconfig: pass --font-file, not a bare --font "

Network accessline 1118

"when it has to resolve a font through fontconfig: pass --font-file, not a bare --font "                               "<family>, on this machine (https://github.com/kajisho5/ffmpeg-skill/issues/100)")     return result

Network accessline 1119

"<family>, on this machine (https://github.com/kajisho5/ffmpeg-skill/issues/100)")

Network accessline 1138

"detail": f"drawtext render crashed (exit {proc.returncode}) instead of failing cleanly -- "                            "the filter is present in this build but cannot render even with the fontfile= the "                            "tools p

Network accessline 1139

"the filter is present in this build but cannot render even with the fontfile= the "                            "tools pass (see https://github.com/kajisho5/ffmpeg-skill/issues/100)"}     tail = " ".join(proc.stderr.strip().splitlines()[-2:

Network accessline 1140

"tools pass (see https://github.com/kajisho5/ffmpeg-skill/issues/100)"}

Network accessline 1396

if cap in ("ffmpeg", "ffprobe"):         from _common import INSTALL_HINTS         hint = INSTALL_HINTS.get(platform.system(), "see https://ffmpeg.org/download.html").strip().splitlines()[0].strip()

Network accessline 1398

hint = INSTALL_HINTS.get(platform.system(), "see https://ffmpeg.org/download.html").strip().splitlines()[0].strip()

`scripts/_platforms.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/audio.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/background.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/batch.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 90
```
[Credential-related source omitted]
```

`scripts/broll.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/caption.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/check.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/color.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/crop.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/cropdetect.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/cut.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/deinterlace.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/denoise.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/export.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/fit.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/freeze.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/graphics.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/grid.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/insert.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/join.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/look.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/loop.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/loudness.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/metadata.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/multicam.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/overlay.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/pad.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/probe.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/proxy.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/redact.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/render.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 724
```
[Credential-related source omitted]
```

`scripts/report.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/reverse.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/scenes.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/sequence.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/silence.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/speedramp.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/sphere.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/stabilize.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/straighten.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/sync.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/verify.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`scripts/waveform.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`site/brand/favicon.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256"><style>.a{fill:#101114}.d{fill:#00A63E}@media (prefers-color-scheme:dark){.a{fill:#FFFFFF}.d{fill:#17D16A}}</style><path class="a" fill-rule="evenodd" d="M110.0,52 H52 A18,18 0 0

`site/brand/ffmpeg-skill-horizontal-on-dark.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 902 256" width="902" height="256" role="img" aria-label="ffmpeg-skill"><title>ffmpeg-skill</title><g transform="translate(-34,0)"><path fill="#FFFFFF" fill-rule="evenodd" d="M117.0,52 H52

`site/brand/ffmpeg-skill-symbol-on-dark.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" width="256" height="256" role="img" aria-label="ffmpeg-skill"><title>ffmpeg-skill</title><path fill="#FFFFFF" fill-rule="evenodd" d="M117.0,52 H52 A18,18 0 0 0 34,70 V186 A18,18

`site/brand/velisa-horizontal-on-dark.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 778 256" width="778" height="256" role="img" aria-label="Velisa"><title>Velisa</title><path fill="#FFFFFF" fill-rule="evenodd" d="M64.06,163.08 L64.86,164.08 L65.74,165.00 L66.72,165.82 L

`site/brand/velisa-horizontal.svg`

Network accessline 1

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 778 256" width="778" height="256" role="img" aria-label="Velisa"><title>Velisa</title><path fill="#101114" fill-rule="evenodd" d="M64.06,163.08 L64.86,164.08 L65.74,165.00 L66.72,165.82 L

`site/index.html`

Network accessline 10

<link rel="icon" href="brand/favicon.svg" type="image/svg+xml"> <link rel="apple-touch-icon" href="brand/apple-touch-icon.png"> <link rel="canonical" href="https://kajisho5.github.io/ffmpeg-skill/">

Network accessline 11

<link rel="apple-touch-icon" href="brand/apple-touch-icon.png"> <link rel="canonical" href="https://kajisho5.github.io/ffmpeg-skill/"> <link rel="alternate" hreflang="en" href="https://kajisho5.github.io/ffmpeg-skill/">

Network accessline 12

<link rel="canonical" href="https://kajisho5.github.io/ffmpeg-skill/">

Network accessline 13

<link rel="alternate" hreflang="en" href="https://kajisho5.github.io/ffmpeg-skill/">

Network accessline 14

<link rel="alternate" hreflang="ja" href="https://kajisho5.github.io/ffmpeg-skill/?lang=ja">

Network accessline 16

<meta property="og:title" content="ffmpeg-skill"> <meta property="og:description" content="Give your coding agent a video editor. Local FFmpeg, no cloud, no API keys."> <meta property="og:url" content="https://kajisho5.github.io/ffmpeg-skil

Network accessline 17

<meta property="og:description" content="Give your coding agent a video editor. Local FFmpeg, no cloud, no API keys."> <meta property="og:url" content="https://kajisho5.github.io/ffmpeg-skill/"> <meta property="og:image" content="https://ka

Network accessline 18

<meta property="og:url" content="https://kajisho5.github.io/ffmpeg-skill/">

Network accessline 19

<meta property="og:image" content="https://kajisho5.github.io/ffmpeg-skill/brand/og.png">

Network accessline 21

<meta property="og:image:height" content="640"> <meta name="twitter:card" content="summary_large_image"> <link rel="preconnect" href="https://fonts.googleapis.com">

Network accessline 22

<meta name="twitter:card" content="summary_large_image"> <link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>

Network accessline 23

<link rel="preconnect" href="https://fonts.googleapis.com">

Network accessline 24

<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>

Network accessline 25

<link href="https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap" rel="stylesheet">

Network accessline 26

<script src="https://unpkg.com/@phosphor-icons/web@2.1.2"></script>

Network accessline 27

<script type="application/ld+json"> {   "@context": "https://schema.org",

Network accessline 28

{   "@context": "https://schema.org",   "@type": "SoftwareApplication",

Network accessline 29
```
"@context": "https://schema.org",
```

Network accessline 32

"applicationCategory": "MultimediaApplication",   "operatingSystem": "macOS, Linux, Windows",   "license": "https://opensource.org/licenses/MIT",

Network accessline 33

"operatingSystem": "macOS, Linux, Windows",   "license": "https://opensource.org/licenses/MIT",   "offers": {"@type": "Offer", "price": "0", "priceCurrency": "USD"},

Network accessline 34

"license": "https://opensource.org/licenses/MIT",

Network accessline 35

"offers": {"@type": "Offer", "price": "0", "priceCurrency": "USD"},   "url": "https://kajisho5.github.io/ffmpeg-skill/",   "codeRepository": "https://github.com/kajisho5/ffmpeg-skill"

Network accessline 36

"url": "https://kajisho5.github.io/ffmpeg-skill/",

Network accessline 37

"codeRepository": "https://github.com/kajisho5/ffmpeg-skill"

Network accessline 347

<div class="acts">           <a class="btn btn-key btn-lg" href="#install" data-i="cta.start">Get started</a>           <a class="btn btn-line btn-lg" href="https://github.com/kajisho5/ffmpeg-skill"><i class="ph ph-github-logo" aria-hidden=

Network accessline 348

<a class="btn btn-key btn-lg" href="#install" data-i="cta.start">Get started</a>           <a class="btn btn-line btn-lg" href="https://github.com/kajisho5/ffmpeg-skill"><i class="ph ph-github-logo" aria-hidden="true"></i><span data-i="cta.

Network accessline 349

<a class="btn btn-line btn-lg" href="https://github.com/kajisho5/ffmpeg-skill"><i class="ph ph-github-logo" aria-hidden="true"></i><span data-i="cta.gh">View on GitHub</span></a>

Network accessline 494

<img class="vl vl-dark" src="brand/velisa-horizontal-on-dark.svg" alt="Velisa" width="91" height="30">         <p data-i="eco.p">On its own, it is a local FFmpeg engine. In Velisa, it is the hands: it cuts, measures and exports, and reports

Network accessline 495

<p data-i="eco.p">On its own, it is a local FFmpeg engine. In Velisa, it is the hands: it cuts, measures and exports, and reports back in JSON. It never decides what to cut.</p>         <a class="go" href="https://github.com/kajisho5/Velisa

Network accessline 496

<a class="go" href="https://github.com/kajisho5/Velisa"><span data-i="eco.l">Velisa</span> →</a>

Network accessline 500

<h3>What Is Verification-Driven Coding?<br>A Discipline for Not Trusting Generation</h3>         <p class="cite">Kajiyama, S. (2026). Zenodo · doi:10.5281/zenodo.23720216</p>         <a class="go" href="https://doi.org/10.5281/zenodo.237202

Network accessline 501

<p class="cite">Kajiyama, S. (2026). Zenodo · doi:10.5281/zenodo.23720216</p>         <a class="go" href="https://doi.org/10.5281/zenodo.23720216"><span data-i="paper.l">Read the paper</span> →</a>       </div>

Network accessline 502

<a class="go" href="https://doi.org/10.5281/zenodo.23720216"><span data-i="paper.l">Read the paper</span> →</a>

Network accessline 515

<div class="acts">           <a class="btn btn-key btn-lg" href="#install" data-i="cta.start">Get started</a>           <a class="btn btn-line btn-lg" href="https://github.com/kajisho5/ffmpeg-skill"><i class="ph ph-github-logo" aria-hidden=

Network accessline 516

<a class="btn btn-key btn-lg" href="#install" data-i="cta.start">Get started</a>           <a class="btn btn-line btn-lg" href="https://github.com/kajisho5/ffmpeg-skill"><i class="ph ph-github-logo" aria-hidden="true"></i><span data-i="cta.

Network accessline 517

<a class="btn btn-line btn-lg" href="https://github.com/kajisho5/ffmpeg-skill"><i class="ph ph-github-logo" aria-hidden="true"></i><span data-i="cta.gh">View on GitHub</span></a>

Network accessline 534

<span>© 2026 kajisho5 · MIT · <span data-i="f.part">Part of Velisa</span></span>         <nav aria-label="Footer">           <a href="https://github.com/kajisho5/ffmpeg-skill">GitHub</a>

Network accessline 535

<nav aria-label="Footer">           <a href="https://github.com/kajisho5/ffmpeg-skill">GitHub</a>           <a href="https://www.npmjs.com/package/ffmpeg-skill">npm</a>

Network accessline 536

<a href="https://github.com/kajisho5/ffmpeg-skill">GitHub</a>

Network accessline 537

<a href="https://www.npmjs.com/package/ffmpeg-skill">npm</a>

Network accessline 538

<a href="https://github.com/sponsors/kajisho5">Sponsor</a>

`tests/_fixtures.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 22
```
[Credential-related source omitted]
```
Access to secretsline 24
```
[Credential-related source omitted]
```
Access to secretsline 29
```
[Credential-related source omitted]
```
Access to secretsline 35
```
[Credential-related source omitted]
```
Access to secretsline 40
```
[Credential-related source omitted]
```
Access to secretsline 225
```
[Credential-related source omitted]
```

`tests/bench_scenes.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`tests/bench_silence.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`tests/bench_sync.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`tests/bench_vt.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`tests/corpus.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

Network accessline 23

ROOT = Path(__file__).resolve().parent.parent DEST = ROOT / "tests" / "corpus" UA = {"User-Agent": "ffmpeg-skill-corpus/0.1 (+https://github.com/kajisho5/ffmpeg-skill)"}

Network accessline 25

UA = {"User-Agent": "ffmpeg-skill-corpus/0.1 (+https://github.com/kajisho5/ffmpeg-skill)"}

Network accessline 27

MANIFEST = [     {"id": "gopro_hero", "url": "https://archive.org/download/grizzly-bear-selfie/GX010743.MP4", "file": "gopro_GX010743.MP4",

Network accessline 28

{"id": "gopro_hero", "url": "https://archive.org/download/grizzly-bear-selfie/GX010743.MP4", "file": "gopro_GX010743.MP4",

Network accessline 29

"source": "archive.org grizzly-bear-selfie (user upload)", "why": "GoPro HERO native file: GPMF metadata track, 4:2:0 HEVC/H.264, high bitrate, extra data streams", "max_mb": 260,      "expect": {"video.codec": ["hevc", "h264"], "audio.chan

Network accessline 30

"expect": {"video.codec": ["hevc", "h264"], "audio.channels": 2}},     {"id": "dji_drone", "url": "https://archive.org/download/dji-0230/DJI_0038.MOV", "file": "dji_DJI_0038.MOV",      "source": "archive.org dji-0230 (user upload)", "why":

Network accessline 31

{"id": "dji_drone", "url": "https://archive.org/download/dji-0230/DJI_0038.MOV", "file": "dji_DJI_0038.MOV",

Network accessline 32

"source": "archive.org dji-0230 (user upload)", "why": "DJI drone .MOV: 4K, D-Log/normal profile, possibly no audio", "max_mb": 200,      "expect": {"video.codec": ["hevc", "h264"]}},     {"id": "iphone_mov", "url": "https://archive.org/dow

Network accessline 33

"expect": {"video.codec": ["hevc", "h264"]}},     {"id": "iphone_mov", "url": "https://archive.org/download/jupiter-canyon/IMG_3179.MOV", "file": "iphone_IMG_3179.MOV",      "source": "archive.org jupiter-canyon (user upload)", "why": "iPho

Network accessline 34

{"id": "iphone_mov", "url": "https://archive.org/download/jupiter-canyon/IMG_3179.MOV", "file": "iphone_IMG_3179.MOV",

Network accessline 35

"source": "archive.org jupiter-canyon (user upload)", "why": "iPhone .MOV from another device/generation than the local sample", "max_mb": 80,      "expect": {"video.codec": ["hevc", "h264"]}},     {"id": "android_screen", "url": "https://a

Network accessline 36

"expect": {"video.codec": ["hevc", "h264"]}},     {"id": "android_screen", "url": "https://archive.org/download/screen-recording-20231223-021623/Screen_Recording_20231223_021623.mp4", "file": "android_screen_1.mp4",      "source": "archive.

Network accessline 37

{"id": "android_screen", "url": "https://archive.org/download/screen-recording-20231223-021623/Screen_Recording_20231223_021623.mp4", "file": "android_screen_1.mp4",

Network accessline 38

"source": "archive.org screen-recording-20231223-021623", "why": "Android screen recording: VFR, odd resolution, possibly mono/no audio", "max_mb": 20,      "expect": {}},     {"id": "android_screen2", "url": "https://archive.org/download/s

Network accessline 39

"expect": {}},     {"id": "android_screen2", "url": "https://archive.org/download/screen-recording-20260303-174357-2/Screen_Recording_20260303_174357(2).mp4", "file": "android_screen_2.mp4",      "source": "archive.org screen-recording-2026

Network accessline 40

{"id": "android_screen2", "url": "https://archive.org/download/screen-recording-20260303-174357-2/Screen_Recording_20260303_174357(2).mp4", "file": "android_screen_2.mp4",

Network accessline 41

"source": "archive.org screen-recording-20260303-174357-2", "why": "second Android screen recording", "max_mb": 20, "expect": {}},     {"id": "hdr10_pattern", "url": "https://archive.org/download/mehanik-hdr10-test-patterns/02.%20White%20%2

Network accessline 42

{"id": "hdr10_pattern", "url": "https://archive.org/download/mehanik-hdr10-test-patterns/02.%20White%20%26%20Color%20clipping/02.%20White%20240-1000nits-MaxCLL-1000-MDL-1000.mp4", "file": "hdr10_white_clipping.mp4",

Network accessline 43

"source": "archive.org mehanik-hdr10-test-patterns", "why": "HDR10 (PQ, BT.2020) with MaxCLL/MDL metadata: tone-map and tag handling", "max_mb": 60,      "expect": {"video.hdr": True, "video.color_transfer": "smpte2084"}},     {"id": "iphon

Network accessline 44

"expect": {"video.hdr": True, "video.color_transfer": "smpte2084"}},     {"id": "iphone13_4k60", "url": "https://img.photographyblog.com/reviews/apple_iphone_13_pro/sample_images/4K60p.mov", "file": "iphone13pro_4K60p.mov",      "source": "

Network accessline 45

{"id": "iphone13_4k60", "url": "https://img.photographyblog.com/reviews/apple_iphone_13_pro/sample_images/4K60p.mov", "file": "iphone13pro_4K60p.mov",

Network accessline 46

"source": "photographyblog.com iPhone 13 Pro review samples", "why": "iPhone 13 Pro 4K60 .mov (Dolby Vision HLG expected), large frame + high fps", "max_mb": 400,      "expect": {"video.codec": "hevc", "video.hdr": True}},     {"id": "blend

Network accessline 47

"expect": {"video.codec": "hevc", "video.hdr": True}},     {"id": "blender_tos_720", "url": "https://download.blender.org/demo/movies/ToS/tears_of_steel_720p.mov", "file": "tears_of_steel_720p.mov",      "source": "Blender Foundation, Tears

Network accessline 48

{"id": "blender_tos_720", "url": "https://download.blender.org/demo/movies/ToS/tears_of_steel_720p.mov", "file": "tears_of_steel_720p.mov",

Network accessline 49

"source": "Blender Foundation, Tears of Steel (CC-BY 3.0)", "why": "clean H.264 .mov with real dialogue, music and scene cuts for scenes/silence/loudness", "max_mb": 400,      "expect": {"video.codec": "h264", "audio.channels": 2}},     {"i

Network accessline 50

"expect": {"video.codec": "h264", "audio.channels": 2}},     {"id": "vp9_hdr", "url": "https://storage.googleapis.com/media.webmproject.org/devsite/vp9/hdr-encoding/strobe_scientist.mkv", "file": "vp9_hdr_strobe_scientist.mkv",      "source

Network accessline 51

{"id": "vp9_hdr", "url": "https://storage.googleapis.com/media.webmproject.org/devsite/vp9/hdr-encoding/strobe_scientist.mkv", "file": "vp9_hdr_strobe_scientist.mkv",

Network accessline 52

"source": "webmproject.org VP9 HDR encoding guide", "why": "VP9 10-bit HDR in Matroska: non-HEVC HDR path", "max_mb": 200,      "expect": {"video.codec": "vp9", "video.hdr": True}},     {"id": "rtings_24p", "url": "https://www.rtings.com/im

Network accessline 53

"expect": {"video.codec": "vp9", "video.hdr": True}},     {"id": "rtings_24p", "url": "https://www.rtings.com/images/test-materials/2015/305_24p.mp4", "file": "rtings_305_24p.mp4",      "source": "rtings.com test materials", "why": "24p jud

Network accessline 54

{"id": "rtings_24p", "url": "https://www.rtings.com/images/test-materials/2015/305_24p.mp4", "file": "rtings_305_24p.mp4",

Network accessline 59

def fetch(entry: dict, force: bool = False) -> Path:

Network accessline 63

out = DEST / entry["file"]     cap = entry["max_mb"] * 1024 * 1024     head = urllib.request.urlopen(urllib.request.Request(entry["url"], headers=UA, method="HEAD"), timeout=60)

Network accessline 64

cap = entry["max_mb"] * 1024 * 1024     head = urllib.request.urlopen(urllib.request.Request(entry["url"], headers=UA, method="HEAD"), timeout=60)     total = int(head.headers.get("Content-Length") or 0)

Network accessline 65

head = urllib.request.urlopen(urllib.request.Request(entry["url"], headers=UA, method="HEAD"), timeout=60)

Network accessline 80

headers["Range"] = f"bytes={have}-"         try:             with urllib.request.urlopen(urllib.request.Request(entry["url"], headers=headers), timeout=60) as resp:

Network accessline 81

try:             with urllib.request.urlopen(urllib.request.Request(entry["url"], headers=headers), timeout=60) as resp:                 mode = "ab" if have and resp.status == 206 else "wb"

Network accessline 82

with urllib.request.urlopen(urllib.request.Request(entry["url"], headers=headers), timeout=60) as resp:

Network accessline 138

for e in entries:             try:                 p = fetch(e, args.force)

Network accessline 139

try:                 p = fetch(e, args.force)                 print(f"ok   {e['id']:16s} {p.stat().st_size / 1e6:6.1f} MB  {p.name}")

Network accessline 140
```
p = fetch(e, args.force)
```

`tests/release_check.sh`

Executable scriptline 1
```
#!/usr/bin/env bash
```
Dangerous shell operationline 15
```
trap 'rm -rf "$TMP"' EXIT
```
Access to secretsline 81
```
[Credential-related source omitted]
```

`tests/run_parallel.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 77
```
[Credential-related source omitted]
```
Access to secretsline 107
```
[Credential-related source omitted]
```

`tests/test_accel.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 59
```
[Credential-related source omitted]
```
Access to secretsline 178
```
[Credential-related source omitted]
```
Access to secretsline 181
```
[Credential-related source omitted]
```
Access to secretsline 193
```
[Credential-related source omitted]
```
Access to secretsline 201
```
[Credential-related source omitted]
```
Access to secretsline 211
```
[Credential-related source omitted]
```
Access to secretsline 219
```
[Credential-related source omitted]
```
Access to secretsline 301
```
[Credential-related source omitted]
```
Access to secretsline 302
```
[Credential-related source omitted]
```
Access to secretsline 304
```
[Credential-related source omitted]
```
Access to secretsline 306
```
[Credential-related source omitted]
```
Access to secretsline 494
```
[Credential-related source omitted]
```
Access to secretsline 579
```
[Credential-related source omitted]
```
Access to secretsline 582
```
[Credential-related source omitted]
```
Access to secretsline 595
```
[Credential-related source omitted]
```
Access to secretsline 737
```
[Credential-related source omitted]
```
Access to secretsline 739
```
[Credential-related source omitted]
```
Access to secretsline 1220
```
[Credential-related source omitted]
```
Access to secretsline 1250
```
[Credential-related source omitted]
```
Access to secretsline 1277
```
[Credential-related source omitted]
```
Access to secretsline 1356
```
[Credential-related source omitted]
```

`tests/test_all.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`tests/test_analysis.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`tests/test_asr.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 39
```
[Credential-related source omitted]
```
Access to secretsline 40
```
[Credential-related source omitted]
```
Access to secretsline 128
```
[Credential-related source omitted]
```
Access to secretsline 129
```
[Credential-related source omitted]
```
Access to secretsline 137
```
[Credential-related source omitted]
```
Access to secretsline 142
```
[Credential-related source omitted]
```
Access to secretsline 143
```
[Credential-related source omitted]
```
Access to secretsline 145
```
[Credential-related source omitted]
```
Access to secretsline 237
```
[Credential-related source omitted]
```
Access to secretsline 263
```
[Credential-related source omitted]
```
Access to secretsline 769
```
[Credential-related source omitted]
```
Access to secretsline 771
```
[Credential-related source omitted]
```
Access to secretsline 775
```
[Credential-related source omitted]
```
Access to secretsline 921
```
[Credential-related source omitted]
```
Access to secretsline 922
```
[Credential-related source omitted]
```

`tests/test_audio.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

Network accessline 521

def test_audiogram_refuses_a_url_image(self):         proc = script("waveform.py", self.src, "--image", "https://example.com/cover.png",

Network accessline 522

proc = script("waveform.py", self.src, "--image", "https://example.com/cover.png",

`tests/test_contract.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 27
```
[Credential-related source omitted]
```
Access to secretsline 34
```
[Credential-related source omitted]
```
Access to secretsline 39
```
[Credential-related source omitted]
```
Access to secretsline 46
```
[Credential-related source omitted]
```
Access to secretsline 106
```
[Credential-related source omitted]
```
Access to secretsline 945
```
[Credential-related source omitted]
```
Access to secretsline 983
```
[Credential-related source omitted]
```
Access to secretsline 1264
```
[Credential-related source omitted]
```
Access to secretsline 1265
```
[Credential-related source omitted]
```
Access to secretsline 1269
```
[Credential-related source omitted]
```
Access to secretsline 1272
```
[Credential-related source omitted]
```
Access to secretsline 1274
```
[Credential-related source omitted]
```
Access to secretsline 1366
```
[Credential-related source omitted]
```
Access to secretsline 1367
```
[Credential-related source omitted]
```
Access to secretsline 1374
```
[Credential-related source omitted]
```
Access to secretsline 1376
```
[Credential-related source omitted]
```
Access to secretsline 1377
```
[Credential-related source omitted]
```
Access to secretsline 1593
```
[Credential-related source omitted]
```

Network accessline 1857

probe.write_text(             "const inst = require(process.argv[2]);\n"             "const cases = [['ffmpeg version 5.1.1-static https://johnvansickle.com/ffmpeg/  Copyright', '5.1'],\n"

Network accessline 1858

"const inst = require(process.argv[2]);\n"             "const cases = [['ffmpeg version 5.1.1-static https://johnvansickle.com/ffmpeg/  Copyright', '5.1'],\n"             "  ['ffmpeg version 6.0 Copyright', '6.0'], ['ffmpeg version 6.1.1-3u

Network accessline 1859

"const cases = [['ffmpeg version 5.1.1-static https://johnvansickle.com/ffmpeg/  Copyright', '5.1'],\n"

Access to secretsline 1919
```
[Credential-related source omitted]
```
Access to secretsline 2002
```
[Credential-related source omitted]
```
Access to secretsline 2024
```
[Credential-related source omitted]
```
Access to secretsline 2027
```
[Credential-related source omitted]
```
Access to secretsline 2028
```
[Credential-related source omitted]
```
Access to secretsline 2032
```
[Credential-related source omitted]
```
Access to secretsline 2041
```
[Credential-related source omitted]
```
Access to secretsline 2058
```
[Credential-related source omitted]
```
Access to secretsline 2132
```
[Credential-related source omitted]
```
Access to secretsline 2390
```
[Credential-related source omitted]
```
Access to secretsline 2447
```
[Credential-related source omitted]
```
Access to secretsline 2563
```
[Credential-related source omitted]
```
Access to secretsline 2877
```
[Credential-related source omitted]
```
Access to secretsline 2888
```
[Credential-related source omitted]
```
Access to secretsline 3045
```
[Credential-related source omitted]
```
Access to secretsline 3276
```
[Credential-related source omitted]
```
Access to secretsline 3279
```
[Credential-related source omitted]
```
Access to secretsline 3281
```
[Credential-related source omitted]
```
Access to secretsline 3292
```
[Credential-related source omitted]
```
Access to secretsline 3299
```
[Credential-related source omitted]
```
Access to secretsline 3302
```
[Credential-related source omitted]
```
Access to secretsline 3303
```
[Credential-related source omitted]
```

Network accessline 3415

import importlib, socket         runner = importlib.import_module("_common.runner")         for url in ("tcp:127.0.0.1:9?x=.mkv", "http://127.0.0.1:9/../../x.mkv", "file:other.mp4", "FILE:x.mp4",

Network accessline 3416

runner = importlib.import_module("_common.runner")         for url in ("tcp:127.0.0.1:9?x=.mkv", "http://127.0.0.1:9/../../x.mkv", "file:other.mp4", "FILE:x.mp4",                     "rtmp://h/live", "concat:a.ts|b.ts", "data:video/mp4;base

Network accessline 3417

for url in ("tcp:127.0.0.1:9?x=.mkv", "http://127.0.0.1:9/../../x.mkv", "file:other.mp4", "FILE:x.mp4",

Network accessline 3424

srv = socket.socket(); srv.bind(("127.0.0.1", 0)); srv.listen(1); srv.settimeout(0.5)

Network accessline 3428

cases = [             ("fit", [self.src, "--aspect", "9:16", "-o", f"tcp:127.0.0.1:{port}?x=.mkv"]),             ("fit", [self.src, "--aspect", "9:16", "-o", f"http://127.0.0.1:{port}/../../x.mkv"]),

Network accessline 3429

("fit", [self.src, "--aspect", "9:16", "-o", f"tcp:127.0.0.1:{port}?x=.mkv"]),             ("fit", [self.src, "--aspect", "9:16", "-o", f"http://127.0.0.1:{port}/../../x.mkv"]),             ("fit", [self.src, "--aspect", "9:16", "-o", "file

Network accessline 3430

("fit", [self.src, "--aspect", "9:16", "-o", f"http://127.0.0.1:{port}/../../x.mkv"]),

Network accessline 3432

("fit", [victim, "--aspect", "9:16", "-o", "file:" + str(victim)]),             ("cut", [self.src, "--start", "0.2", "--end", "0.8", "--snap", "beats",                      "--snap-source", f"http://127.0.0.1:{port}/beacon.wav", "-o", self.

Network accessline 3433

("cut", [self.src, "--start", "0.2", "--end", "0.8", "--snap", "beats",                      "--snap-source", f"http://127.0.0.1:{port}/beacon.wav", "-o", self.out("ghsa_cut.mp4")]),         ]

Network accessline 3434

"--snap-source", f"http://127.0.0.1:{port}/beacon.wav", "-o", self.out("ghsa_cut.mp4")]),

Access to secretsline 3681
```
[Credential-related source omitted]
```
Access to secretsline 3702
```
[Credential-related source omitted]
```
Access to secretsline 3736
```
[Credential-related source omitted]
```
Access to secretsline 3823
```
[Credential-related source omitted]
```
Access to secretsline 3840
```
[Credential-related source omitted]
```
Access to secretsline 5193
```
[Credential-related source omitted]
```
Access to secretsline 5250
```
[Credential-related source omitted]
```
Access to secretsline 5255
```
[Credential-related source omitted]
```
Access to secretsline 5259
```
[Credential-related source omitted]
```
Dangerous shell operationline 5524
```
self.assertIn("sudo apt", line)
```

Network accessline 5536

import datetime         datetime.date.fromisoformat(_contract.FFMPEG_ADVISORIES_CHECKED)         self.assertEqual(_contract.FFMPEG_ADVISORY_SOURCE, "https://ffmpeg.org/security.html")

Network accessline 5537

datetime.date.fromisoformat(_contract.FFMPEG_ADVISORIES_CHECKED)         self.assertEqual(_contract.FFMPEG_ADVISORY_SOURCE, "https://ffmpeg.org/security.html")         self.assertTrue(_contract.FFMPEG_ADVISORIES)

Network accessline 5538

self.assertEqual(_contract.FFMPEG_ADVISORY_SOURCE, "https://ffmpeg.org/security.html")

Network accessline 5554

src = (SCRIPTS / "_contract.py").read_text(encoding="utf-8")         for mod in ("urllib", "http.client", "socket", "requests"):

Network accessline 5555

for mod in ("urllib", "http.client", "socket", "requests"):

Access to secretsline 5588
```
[Credential-related source omitted]
```
Access to secretsline 5660
```
[Credential-related source omitted]
```
Access to secretsline 5684
```
[Credential-related source omitted]
```
Access to secretsline 5787
```
[Credential-related source omitted]
```
Access to secretsline 5902
```
[Credential-related source omitted]
```
Access to secretsline 5944
```
[Credential-related source omitted]
```
Access to secretsline 5945
```
[Credential-related source omitted]
```
Access to secretsline 6114
```
[Credential-related source omitted]
```
Access to secretsline 6169
```
[Credential-related source omitted]
```
Access to secretsline 6360
```
[Credential-related source omitted]
```

`tests/test_cut_copy.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`tests/test_delivery.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```

`tests/test_editing.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 2329
```
[Credential-related source omitted]
```
Access to secretsline 2338
```
[Credential-related source omitted]
```
Access to secretsline 2360
```
[Credential-related source omitted]
```
Access to secretsline 2365
```
[Credential-related source omitted]
```
Access to secretsline 2386
```
[Credential-related source omitted]
```
Access to secretsline 2392
```
[Credential-related source omitted]
```
Access to secretsline 2524
```
[Credential-related source omitted]
```

`tests/test_orchestration.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 1265
```
[Credential-related source omitted]
```
Access to secretsline 1849
```
[Credential-related source omitted]
```
Access to secretsline 2138
```
[Credential-related source omitted]
```

`tests/test_picture.py`

Executable scriptline 1
```
#!/usr/bin/env python3
```
Access to secretsline 602
```
[Credential-related source omitted]
```
Access to secretsline 635
```
[Credential-related source omitted]
```
Access to secretsline 636
```
[Credential-related source omitted]
```
Access to secretsline 1127
```
[Credential-related source omitted]
```
Access to secretsline 1666
```
[Credential-related source omitted]
```
Access to secretsline 2292
```
[Credential-related source omitted]
```
Access to secretsline 3223
```
[Credential-related source omitted]
```
Access to secretsline 3224
```
[Credential-related source omitted]
```
Access to secretsline 3244
```
[Credential-related source omitted]
```
Access to secretsline 3245
```
[Credential-related source omitted]
```
Access to secretsline 3336
```
[Credential-related source omitted]
```
Access to secretsline 3337
```
[Credential-related source omitted]
```
Access to secretsline 3352
```
[Credential-related source omitted]
```
Access to secretsline 3353
```
[Credential-related source omitted]
```
Access to secretsline 3405
```
[Credential-related source omitted]
```

Network accessline 3526

source = "\n".join(p.read_text(encoding="utf-8")                            for p in sorted(Path(_common.__file__).parent.glob("*.py")))         for banned in ("urllib", "http.client", "requests", "socket."):

Network accessline 3527

for p in sorted(Path(_common.__file__).parent.glob("*.py")))         for banned in ("urllib", "http.client", "requests", "socket."):             self.assertNotIn(banned, source, f"{banned} is reachable from the emoji path")

Network accessline 3528

for banned in ("urllib", "http.client", "requests", "socket."):

Possible obfuscationline 3567

"""U+200D ZWJ and U+200C ZWNJ are ordinary Indic/Persian orthography, not emoji: क्<U+200D>ष is

Access to secretsline 3729
```
[Credential-related source omitted]
```
Access to secretsline 3749
```
[Credential-related source omitted]
```
Access to secretsline 3776
```
[Credential-related source omitted]
```
Access to secretsline 3874
```
[Credential-related source omitted]
```
Access to secretsline 3951
```
[Credential-related source omitted]
```
Access to secretsline 4041
```
[Credential-related source omitted]
```
Access to secretsline 4894
```
[Credential-related source omitted]
```

How the signals fit together

Facts from a static read of the files at the pinned commit. They describe what the code does, not why.

Some files could not be read; the facts below still hold.

Hidden characters: 1 fact

Joiner U+200D outside an emoji or a script that needs it, in prosescripts/_common/emoji.py:75High confidence

Signal confidence: 492 facts

Network access in prose of the SKILL.md.claude/skills/build-artifacts/SKILL.md:182Low confidence
Network access in prose of the SKILL.md.claude/skills/ci-pipeline-synthesizer/SKILL.md:114Low confidence
Network access in prose of the SKILL.md.claude/skills/ci-pipeline-synthesizer/SKILL.md:116Low confidence
Network access in prose of the SKILL.md.claude/skills/concurrent-branches/SKILL.md:244Low confidence
Network access in prose of the SKILL.md.claude/skills/cross-surface-changes/SKILL.md:227Low confidence
Network access in prose of the SKILL.md.claude/skills/defect-reports/SKILL.md:222Low confidence
Dangerous shell operation in the frontmatter of the SKILL.md.claude/skills/destructive-operations/SKILL.md:3Low confidence
Dangerous shell operation in code of the SKILL.md.claude/skills/destructive-operations/SKILL.md:29High confidence
Network access in prose of the SKILL.md.claude/skills/destructive-operations/SKILL.md:211Low confidence
Dangerous shell operation in the frontmatter of the SKILL.md.claude/skills/git-hygiene/SKILL.md:3Low confidence
Dangerous shell operation in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:23High confidence
Dangerous shell operation in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:24High confidence
Dangerous shell operation in prose of the SKILL.md.claude/skills/git-hygiene/SKILL.md:62Low confidence
Network access in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:93High confidence
Network access in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:94High confidence
Network access in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:95High confidence
Network access in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:96High confidence
Network access in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:97High confidence
Network access in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:98High confidence
Access to secrets in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:107High confidence
Access to secrets in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:183High confidence
Dangerous shell operation in code of the SKILL.md.claude/skills/git-hygiene/SKILL.md:188High confidence
Network access in prose of the SKILL.md.claude/skills/git-hygiene/SKILL.md:216Low confidence
Network access in code of the SKILL.md.claude/skills/github-actions/SKILL.md:49High confidence
Network access in code of the SKILL.md.claude/skills/github-actions/SKILL.md:50High confidence
Network access in code of the SKILL.md.claude/skills/github-actions/SKILL.md:51High confidence
Network access in code of the SKILL.md.claude/skills/github-actions/SKILL.md:52High confidence
Dangerous shell operation in code of the SKILL.md.claude/skills/github-actions/SKILL.md:53High confidence
Network access in code of the SKILL.md.claude/skills/github-actions/SKILL.md:53High confidence
Network access in code of the SKILL.md.claude/skills/github-actions/SKILL.md:54High confidence
Dangerous shell operation in code of the SKILL.md.claude/skills/github-actions/SKILL.md:56High confidence
Network access in prose of the SKILL.md.claude/skills/github-actions/SKILL.md:62Low confidence
Network access in prose of the SKILL.md.claude/skills/github-actions/SKILL.md:63Low confidence
Network access in prose of the SKILL.md.claude/skills/github-actions/SKILL.md:64Low confidence
Network access in prose of the SKILL.md.claude/skills/github-actions/SKILL.md:317Low confidence
Network access in prose of the SKILL.md.claude/skills/mcp-server-design/SKILL.md:286Low confidence
Network access in code of the SKILL.md.claude/skills/release-management/SKILL.md:37High confidence
Network access in code of the SKILL.md.claude/skills/release-management/SKILL.md:38High confidence
Network access in prose of the SKILL.md.claude/skills/release-management/SKILL.md:147Low confidence
Network access in prose of the SKILL.md.claude/skills/reproducing-ci-locally/SKILL.md:250Low confidence
Network access in code of the SKILL.md.claude/skills/verifying-external-behavior/SKILL.md:26High confidence
Network access in code of the SKILL.md.claude/skills/verifying-external-behavior/SKILL.md:27High confidence
Network access in code of the SKILL.md.claude/skills/verifying-external-behavior/SKILL.md:28High confidence
Network access in prose of the SKILL.md.claude/skills/verifying-external-behavior/SKILL.md:217Low confidence
Executable script in code of a file that runs.github/scripts/build_pages.py:1High confidence
Network access in code of a file that runs.github/scripts/build_pages.py:27High confidence
Network access in code of a file that runs.github/scripts/build_pages.py:28High confidence
Executable script in code of a file that runs.github/scripts/bump_contract_md.py:1High confidence
Executable script in code of a file that runs.github/scripts/bump_roadmap_md.py:1High confidence
Executable script in prose of a file that runs.github/scripts/design_decisions_index.py:1Low confidence

and 442 more

Works with

Agent compatibility, from the files in this repository
Agent	Status	Evidence	Install to
Claude Code	Native	Manifest .claude-plugin/marketplace.json	`.claude/skills/<skill-name>/`
Codex	Native	Manifest AGENTS.md	`.agents/skills/<skill-name>/`
Cursor	Compatible	Standard SKILL.md SKILL.md	`.cursor/skills/<skill-name>/`
Gemini CLI	Compatible	Standard SKILL.md SKILL.md	`.gemini/skills/<skill-name>/`
GitHub Copilot	Compatible	Standard SKILL.md SKILL.md	`.github/skills/<skill-name>/`
OpenCode	Compatible	Standard SKILL.md SKILL.md	`.opencode/skills/<skill-name>/`

Native The repository ships a manifest, folder or frontmatter field for this agent.
Compatible A standard SKILL.md that this agent can read.
Unknown No evidence either way.

Derived automatically from paths, manifests and frontmatter. Not tested on each agent.

Add this badge to your README

It updates every night and links to this page.

[![kajisho5/ffmpeg-skill on hotskills](https://hotskills.dev/badge/kajisho5-ffmpeg-skill.svg)](https://hotskills.dev/skill/kajisho5-ffmpeg-skill/)

kajisho5/ffmpeg-skill

History

SKILL.md

Share this page

Heat

Stars over time

Individual skills in this repository

How it works

ffmpeg-skill

Frontmatter

SKILL.md

Reference documents

The playbook

Scripts executed separately

Files

Skills included

Repository facts

Rank over the last 12 weeks

Before you install

.claude-plugin/marketplace.json

.claude-plugin/plugin.json

.claude/skills/build-artifacts/SKILL.md

.claude/skills/ci-pipeline-synthesizer/SKILL.md

.claude/skills/concurrent-branches/SKILL.md

.claude/skills/cross-surface-changes/SKILL.md

.claude/skills/defect-reports/SKILL.md

.claude/skills/destructive-operations/SKILL.md

.claude/skills/git-hygiene/SKILL.md

.claude/skills/github-actions/SKILL.md

.claude/skills/mcp-server-design/SKILL.md

.claude/skills/release-management/SKILL.md

.claude/skills/reproducing-ci-locally/SKILL.md

.claude/skills/verifying-external-behavior/SKILL.md

.github/ISSUE_TEMPLATE/config.yml

.github/scripts/build_pages.py

.github/scripts/bump_contract_md.py

.github/scripts/bump_roadmap_md.py

.github/scripts/design_decisions_index.py

.github/scripts/pages_layout.html

.github/scripts/resolve_version.py

.github/workflows/ci.yml

.github/workflows/pages.yml

.github/workflows/release.yml

.npmignore

.snyk

CHANGELOG.md

CODE_OF_CONDUCT.md

CONTRIBUTING.md

README.md

SKILL.md

bin/install.js

brand/ffmpeg-skill.icon/Assets/in-out.svg

brand/ffmpeg-skill.icon/Assets/playhead.svg

brand/logo/ffmpeg-skill-wordmark-black.svg

brand/logo/ffmpeg-skill-wordmark-white.svg

demos/CI.md

demos/build.py

demos/pages_videos.py

docs/contract.md

docs/roadmap.md

evals/agent_prompts_24.json

evals/contract/check.py

evals/grade_runs.py

evals/grade_runs_24.py

evals/grade_runs_25.py

evals/results/iteration-16-independent-grades.json

evals/results/iteration-16.json

evals/run.py

evals/run_agents_25.sh

evals/trigger/prompts.json

evals/trigger/results-2026-09-04.json

evals/trigger/results-2026-09-11.json

evals/trigger/results-2026-09-12-it7.json

evals/trigger/results-2026-09-12-it8.json

evals/trigger/results-2026-09-12-it9.json

evals/trigger/results-2026-09-12.json

evals/trigger/results-2026-09-13-it10.json

evals/trigger/results-2026-09-13-it11.json

evals/trigger/results-2026-09-13-it12.json

evals/trigger/results-2026-09-13-it13.json

`SKILL.md`

`.claude-plugin/marketplace.json`

`.claude-plugin/plugin.json`

`.claude/skills/build-artifacts/SKILL.md`

`.claude/skills/ci-pipeline-synthesizer/SKILL.md`

`.claude/skills/concurrent-branches/SKILL.md`

`.claude/skills/cross-surface-changes/SKILL.md`

`.claude/skills/defect-reports/SKILL.md`

`.claude/skills/destructive-operations/SKILL.md`

`.claude/skills/git-hygiene/SKILL.md`

`.claude/skills/github-actions/SKILL.md`

`.claude/skills/mcp-server-design/SKILL.md`

`.claude/skills/release-management/SKILL.md`

`.claude/skills/reproducing-ci-locally/SKILL.md`

`.claude/skills/verifying-external-behavior/SKILL.md`

`.github/ISSUE_TEMPLATE/config.yml`

`.github/scripts/build_pages.py`

`.github/scripts/bump_contract_md.py`

`.github/scripts/bump_roadmap_md.py`

`.github/scripts/design_decisions_index.py`

`.github/scripts/pages_layout.html`

`.github/scripts/resolve_version.py`

`.github/workflows/ci.yml`

`.github/workflows/pages.yml`

`.github/workflows/release.yml`

`.npmignore`

`.snyk`

`CHANGELOG.md`

`CODE_OF_CONDUCT.md`

`CONTRIBUTING.md`

`README.md`

`SKILL.md`

`bin/install.js`

`brand/ffmpeg-skill.icon/Assets/in-out.svg`

`brand/ffmpeg-skill.icon/Assets/playhead.svg`

`brand/logo/ffmpeg-skill-wordmark-black.svg`

`brand/logo/ffmpeg-skill-wordmark-white.svg`

`demos/CI.md`

`demos/build.py`

`demos/pages_videos.py`

`docs/contract.md`

`docs/roadmap.md`

`evals/agent_prompts_24.json`

`evals/contract/check.py`

`evals/grade_runs.py`

`evals/grade_runs_24.py`

`evals/grade_runs_25.py`

`evals/results/iteration-16-independent-grades.json`

`evals/results/iteration-16.json`

`evals/run.py`

`evals/run_agents_25.sh`

`evals/trigger/prompts.json`

`evals/trigger/results-2026-09-04.json`

`evals/trigger/results-2026-09-11.json`

`evals/trigger/results-2026-09-12-it7.json`

`evals/trigger/results-2026-09-12-it8.json`

`evals/trigger/results-2026-09-12-it9.json`

`evals/trigger/results-2026-09-12.json`

`evals/trigger/results-2026-09-13-it10.json`

`evals/trigger/results-2026-09-13-it11.json`

`evals/trigger/results-2026-09-13-it12.json`

`evals/trigger/results-2026-09-13-it13.json`

`evals/trigger/results-2026-09-13-it14.json`

`evals/trigger/results-2026-09-13-it15.json`

`evals/trigger/results-2026-09-13-it16.json`

`evals/trigger/results-2026-09-14-it17.json`

`evals/trigger/results-2026-09-14-it18.json`

`evals/trigger/results-2026-09-14-it19.json`

`evals/trigger/results-2026-09-14-it20.json`

`evals/write_fixtures.py`

`examples/make_demo.sh`

`mcp/server.py`

`package.json`

`references/process-pitfalls.md`

`references/workflow.md`

`scripts/_ass_overlay.py`

`scripts/_common/init.py`

`scripts/_common/asr.py`

`scripts/_common/color.py`

`scripts/_common/decision.py`