openverse-sfx

79 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a media skill usually calls an AI service over the internet.

By Varnan-Tech/opendirectory (GitHub) · media · 705 stars · scanned at commit caac7cd

Add a licensed soundtrack to any video for $0 with beat-matched music, Openverse sound effects, -16 LUFS mastering, and FFmpeg verification. Searches 5.2M free CC0/CC-BY/public-domain audio files (no API key), aligns cuts to the kick-drum beat grid with librosa, peak-normalizes SFX one-shots, verifies the exported MP4 with ebur128 and cue frame grabs, and auto-writes credits.txt. Trigger when the user says "add sound to this video", "add music to my video", "add sound effects", "find free SFX",…

Works with any agent that supports SKILL.md skills.

What this skill can do

Downloads and installs other software

The author does not mention this.

Found in 6 places.

skills/openverse-sfx/README.md, line 21npx skills add Varnan-Tech/opendirectory --skill openverse-sfx
skills/openverse-sfx/README.md, line 86| FFmpeg | EBU R128 measurement, sidechain ducking, two-pass loudnorm, MP4 muxing | `brew install ffmpeg` / `apt install ffmpeg` / `winget install ffmpeg` |
skills/openverse-sfx/README.md, line 88| Python packages | Beat tracking (`librosa`), Butterworth filtering (`scipy`), waveform plots (`matplotlib`) | `pip install librosa matplotlib numpy scipy` |

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skills/openverse-sfx/README.md, line 96brew install ffmpeg
skills/openverse-sfx/README.md, line 99pip install librosa matplotlib numpy scipy
skills/openverse-sfx/SKILL.md, line 214. **Prerequisites first.** If missing, install before starting: `ffmpeg`, and `pip install librosa matplotlib numpy scipy`.

Connects to the internet

This is disclosed by the author in the skill's SKILL.md or README. Expected for a media skill.

Found in 8 places.

skills/openverse-sfx/README.md, line 87| Python 3.9+ | Runs the search, download (`urllib.request`), beat-grid, normalization, and verification scripts | python.org |
skills/openverse-sfx/SKILL.md, line 59| `scripts/sfx_fetch.py` | Downloads the chosen file into `sfx/` via Python stdlib (`urllib.request`) and appends its verbatim attribution to `credits.txt` |
skills/openverse-sfx/scripts/sfx_fetch.py, line 12import argparse, os, shutil, sys, urllib.error, urllib.request

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skills/openverse-sfx/scripts/sfx_fetch.py, line 28req = urllib.request.Request(args.audio_url, headers={"User-Agent": "openverse-sfx-skill/1.0"})
skills/openverse-sfx/scripts/sfx_fetch.py, line 29with urllib.request.urlopen(req, timeout=60) as resp, open(tmp_dest, "wb") as out_f:
skills/openverse-sfx/scripts/sfx_search.py, line 14import argparse, json, sys, urllib.error, urllib.parse, urllib.request
skills/openverse-sfx/scripts/sfx_search.py, line 35req = urllib.request.Request(url, headers={"User-Agent": "openverse-sfx-skill/1.0"})
skills/openverse-sfx/scripts/sfx_search.py, line 37with urllib.request.urlopen(req, timeout=30) as r:

Runs commands on your computer

This is disclosed by the author in the skill's SKILL.md or README.

Found in 4 places.

skills/openverse-sfx/scripts/sfx_normalize.py, line 23r = subprocess.run(["ffmpeg", "-i", path, "-af", "ebur128=peak=true", "-f", "null", "-"],
skills/openverse-sfx/scripts/sfx_normalize.py, line 53subprocess.run(["ffmpeg", "-y", "-loglevel", "error", "-i", args.src,
skills/openverse-sfx/scripts/sfx_normalize.py, line 59subprocess.run(["ffmpeg", "-y", "-loglevel", "error", "-i", args.src,

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skills/openverse-sfx/scripts/verify_mix.py, line 16return subprocess.run(cmd, capture_output=True, text=True)

Safer alternatives

Low-risk skills in the same category (media) that look related. Check that one does what you need.

100 Low risksuggest-sfxhassancs91/claude-youtube-editor · 379 stars

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'openverse-sfx' ] || [ -L ~/.agents/skills/'openverse-sfx' ]; then echo 'A skill folder named openverse-sfx already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/Varnan-Tech/opendirectory' "$d" && git -C "$d" checkout --quiet 'caac7cda5621e289591e4e74b400e66ac72ad25b' -- 'skills/openverse-sfx' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/openverse-sfx' ~/.agents/skills/'openverse-sfx' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'openverse-sfx' ~/.claude/skills/'openverse-sfx' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-08	`caac7cd`	79
2026-11-07	`caac7cd`	79