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FFmpeg CLI — measured AI agent skill | DecimalAI

sundial-org/ffmpeg-cli

SkillScore100Maintained

Comprehensive video/audio processing with FFmpeg. Use for: (1) Video transcoding and format conversion, (2) Cutting and merging clips, (3) Audio extraction and manipulation, (4) Thumbnail and GIF generation, (5) Resolution scaling and quality adjustment, (6) Adding subtitles or watermarks, (7) Speed adjustment (slow/fast motion), (8) Color correction and filters.

design-mediaby sundial-org

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

Coding pack

1 · One-time — install the CLI (docs ↗)

pip install decimalai

2 · Get the skill — writes .claude/skills/sundial-org-ffmpeg-cli/SKILL.md

decimalai skills pull sundial-org-ffmpeg-cli --out .claude/skills/

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/sundial-org-ffmpeg-cli/SKILL.md https://app.decimal.ai/s/sundial-org-ffmpeg-cli/SKILL.md

Raw file: /s/sundial-org-ffmpeg-cli/SKILL.md ↗ · machine-readable summary at /s/sundial-org-ffmpeg-cli.json ↗

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

23 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 4h ago

Yes — +83% lift+23% tokens0% turns100% of whole cases pass with skill (23/23)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-01	✗→✓	▲ Improved	46%	0%
case-02	✗→✓	▲ Improved	26%	0%
case-03	✗→✓	▲ Improved	98%	0%
case-04	✗→✓	▲ Improved	9%	0%
case-05	✗→✓	▲ Improved	84%	0%

Showing 5 of 23 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

sundial-org / awesome-openclaw-skills

skills/ffmpeg-cli/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1Bundled 8 files · scripts

Skill contents

scripts/

SKILL.md

FFmpeg CLI

Quick Reference

| Task | Command | |------|---------| | Cut video | {baseDir}/scripts/cut.sh -i <input> -s <start> -e <end> -o <output> | | Merge clips | {baseDir}/scripts/merge.sh -o <output> <file1> <file2> ... | | Extract audio | {baseDir}/scripts/extract-audio.sh -i <video> -o <output.mp3> | | Generate thumbnail | {baseDir}/scripts/thumb.sh -i <video> -t <timestamp> -o <out.jpg> | | Create GIF | {baseDir}/scripts/gif.sh -i <video> -s <start> -e <end> -o <out.gif> | | Convert format | {baseDir}/scripts/convert.sh -i <input> -o <output.mp4> | | Change speed | {baseDir}/scripts/speed.sh -i <input> -r <0.5-2.0> -o <output> | | Add watermark | {baseDir}/scripts/watermark.sh -i <video> -w <image> -o <output> |

Scripts

cut.sh - Cut video segment

bash
{baseDir}/scripts/cut.sh -i video.mp4 -s 00:01:30 -e 00:02:45 -o clip.mp4

merge.sh - Concatenate videos

bash
{baseDir}/scripts/merge.sh -o merged.mp4 part1.mp4 part2.mp4 part3.mp4

extract-audio.sh - Pull audio track

bash
{baseDir}/scripts/extract-audio.sh -i video.mp4 -o audio.mp3

thumb.sh - Extract frame as image

bash
{baseDir}/scripts/thumb.sh -i video.mp4 -t 00:00:15 -o frame.jpg

gif.sh - Convert clip to GIF

bash
{baseDir}/scripts/gif.sh -i video.mp4 -s 00:00:10 -e 00:00:15 -o clip.gif

convert.sh - Transcode to new format

bash
{baseDir}/scripts/convert.sh -i input.avi -o output.mp4

speed.sh - Adjust playback speed

bash
{baseDir}/scripts/speed.sh -i video.mp4 -r 2.0 -o fast.mp4  # 2x speed
{baseDir}/scripts/speed.sh -i video.mp4 -r 0.5 -o slow.mp4  # 0.5x speed

watermark.sh - Overlay image watermark

bash
{baseDir}/scripts/watermark.sh -i video.mp4 -w logo.png -o output.mp4

Notes

All scripts support common video formats (mp4, avi, mov, mkv, webm, etc.)
Output quality is optimized for balanced file size and clarity
Use -h or no args to see script usage

Want to see if sundial-org/ffmpeg-cli would activate on your phrasing? Try it before you install — no LLM call, no signup.

Other measured skills in the registry, with their headline benchmark lift.