Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/chunpu/agent-skills/ffmpeg-video-processingnpx skills add chunpu/agent-skills --skill ffmpeg-video-processinggit clone --depth 1 https://github.com/chunpu/agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/chunpu/agent-skills/ffmpeg-video-processing)<a href="https://agentmods.dev/skills/chunpu/agent-skills/ffmpeg-video-processing"><img src="https://agentmods.dev/badge/skills/chunpu/agent-skills/ffmpeg-video-processing.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00027 | $0.04277 |
| Opus 5 | $0.00014 | $0.02139 |
| Sonnet 5 | $0.00005 | $0.00855 |
| Haiku 4.5 | $0.00003 | $0.00428 |
Grade A, and why
ffmpeg-video-processing scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 351 lines · 27 tokens per session scan A dbd57aca1daa
ffmpeg-video-processing is a skill published in the GitHub repository chunpu/agent-skills (35 stars, last pushed 5mo ago), with no licence file. It adds 27 tokens to every session and 4,277 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
c-video
Download videos, extract audio, convert formats, and clip segments using yt-dlp and ffmpeg. Supports YouTube, Vimeo, and hundreds of other sites.
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Film light leaks, grain, 16:9 letterbox, and large serif type for cinematic openings or chapter cards.
frame-creative-voltage
Electric split with hand-drawn script — offset panels slide in, display title rises with an outlined word, script strokes itself in.
frame-electric-studio
Two-panel split with quote as hero — white/blue panels open from center, accent bar grows, quote reveals line by line.
frame-glitch-title
Digital glitch, chromatic offset, and data-corruption title frame for video transitions or cyberpunk heroes.
vfx-text-cursor
Cursor light trail, chromatic rays, and directional flares for word-by-word quote reveals in video intros.