watermark

name	watermark
description	Overlay the persistent @C0BALT_CUT channel watermark at the BOTTOM of a finished short — the vertical opposite of source-credit's top banner. Renders the handle as a transparent PNG via PIL (Impact, Platinum
allowed-tools	Bash
user-invocable	true

watermark

Persistent channel branding. "@C0BALT_CUT" in Impact at ~2% of frame height, Platinum white with the 0 in Sapphire Glow (brand/BRAND.md palette), thin black stroke, semi-transparent (alpha ≈200) so it reads without competing with captions. Same renderer pattern as source-credit (PIL PNG, ffmpeg overlay) because the local ffmpeg has no libass/drawtext.

Invoke

.claude/skills/watermark/watermark.sh <input> <out>

• input: video to overlay onto (any aspect ratio; designed for 1080x1920)
• out: output mp4

Output

mp4, same dimensions and duration as the input, video re-encoded, audio stream-copied. Cache: skip rebuild when out is newer than input. Prints the output path to stdout.

Geometry

Mark is bottom-anchored at y = 97.5% of frame height, centered horizontally — for a 1080x1920 short the text baseline sits around y=1830. Captions live in the lower third (≈y=1344) and the source credit is a top chyron (y≈77), so the mark collides with neither. The CTA overlay (last ~4s) composites AFTER this skill in the chain, so it covers the mark briefly — intended, the CTA is the louder ask.