AOI Demo Clip Maker

Create and edit macOS hackathon demo clips via terminal commands to record, crop, trim, and apply presets using ffmpeg/ffprobe locally.

AOI Demo Clip Maker (macOS)

S-DNA: AOI-2026-0215-SDNA-CLIP01

What this is

A terminal-only (public-safe) utility skill to create hackathon demo clips on macOS.

It wraps ffmpeg/ffprobe to:

• list capture devices (avfoundation)
• record a screen for N seconds
• crop the top bar (menu/title)
• trim clips
• use simple presets

What this is NOT

• No YouTube upload
• No form submission
• No external posting
• No secret handling

Requirements

• macOS
• ffmpeg and ffprobe installed
• Screen Recording permission granted to your terminal app

Commands

1) List devices (avfoundation)

bash

aoi-clip devices

2) Record (screen capture)

bash

# pixel_format auto-fallback is enabled by default
# (tries: uyvy422 → nv12 → yuyv422 → 0rgb → bgr0)
aoi-clip record --out tempo_demo_raw.mp4 --duration 15 --fps 30 --screen "Capture screen 0"

# optionally force a specific pixel format
# aoi-clip record --out tempo_demo_raw.mp4 --duration 15 --fps 30 --screen "Capture screen 0" --pixel uyvy422

3) Crop top bar

bash

# explicit crop
aoi-clip crop --in tempo_demo_raw.mp4 --out tempo_demo_crop.mp4 --top 150

# auto-recommend top crop based on video height (still applies crop, but chooses a value)
aoi-clip crop --in tempo_demo_raw.mp4 --out tempo_demo_crop.mp4 --top auto

4) Trim

bash

aoi-clip trim --in tempo_demo_crop.mp4 --out tempo_demo_15s.mp4 --from 0 --to 15

5) Preset: terminal

bash

aoi-clip preset terminal --out demo.mp4

Security / Audit posture

This skill runs local ffmpeg/ffprobe only, using a strict allowlist of binaries and arguments.

Release governance (public)

We publish AOI skills for free and keep improving them. Every release must pass our Security Gate and include an auditable changelog. We do not ship updates that weaken security or licensing clarity. Repeated violations trigger progressive restrictions (warnings → publish pause → archive).

Support

• Issues / bugs / requests: https://github.com/edmonddantesj/aoi-skills/issues
• Please include the skill slug: aoi-demo-clip-maker

License

MIT