# Ffmpeg

> Media processing (10 man pages).

- Skill: `plurigrid/ffmpeg-2` (Agent Skill)
- Install (CLI): `npx skillmds@latest add plurigrid/ffmpeg-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/plurigrid/ffmpeg-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: plurigrid (https://skillmd.com/u/plurigrid)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/plurigrid/ffmpeg-2

---



# ffmpeg

Media processing (10 man pages).

## Convert

```bash
ffmpeg -i input.mov -c:v libx264 output.mp4
ffmpeg -i input.mp4 -c:v libvpx-vp9 output.webm
```

## Audio

```bash
ffmpeg -i video.mp4 -vn -c:a aac audio.m4a
ffmpeg -i input.mp3 -ar 44100 output.wav
```

## Resize

```bash
ffmpeg -i input.mp4 -vf scale=1280:720 output.mp4
ffmpeg -i input.mp4 -vf scale=-1:480 output.mp4
```

## GIF

```bash
ffmpeg -i input.mp4 -vf "fps=10,scale=320:-1" output.gif
```

## Concat

```bash
ffmpeg -f concat -i list.txt -c copy output.mp4
```

## Capture

```bash
ffmpeg -f avfoundation -i "1" -t 10 capture.mp4
```

## Stream

```bash
ffmpeg -i input.mp4 -f mpegts - | mpv -
```



## Scientific Skill Interleaving

This skill connects to the K-Dense-AI/claude-scientific-skills ecosystem:

### Graph Theory
- **networkx** [○] via bicomodule
  - Universal graph hub

### Bibliography References

- `general`: 734 citations in bib.duckdb

## Cat# Integration

This skill maps to **Cat# = Comod(P)** as a bicomodule in the equipment structure:

```
Trit: 0 (ERGODIC)
Home: Prof
Poly Op: ⊗
Kan Role: Adj
Color: #26D826
```

### GF(3) Naturality

The skill participates in triads satisfying:
```
(-1) + (0) + (+1) ≡ 0 (mod 3)
```

This ensures compositional coherence in the Cat# equipment structure.