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nhhthongnhhthong/claude-veo/skills/gif-loop/SKILL.md

gif-loop

Skill0 starsChanged 14 days agoMITView on GitHub

Make a short, seamless, looping GIF (4 to 10 s) for a README, docs page, release note or social post - a product moment, a dashboard coming alive, a process diagram, a launch title - built as a deterministic HTML page and encoded to fit a size budget. Use when the user asks for a GIF, an animated preview, a hero animation for a README, or to turn part of a claude-veo video into a GIF.

The file

We split this skill into the rules it gives an agent

1 rule. About 0 are common, 0 are distinctive, and 1 is very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈0

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 1

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Look at two or three frames of the GIF itself (ffmpeg -i preview.gif -vf "select='eq(n\,60)'" -frames:v 1 f.png): banding, dithering noise …

    line 26

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Looping GIF

Uses the engine in ../video-engine/ (kit and scripts). Read ../video-engine/SKILL.md first. Working examples: examples/gifs/ in this repository (dashboard, HTTPS handshake, CI/CD pipeline, launch title).

Design for a loop

  • One moment, 6 to 8 s. A GIF shows one idea: numbers counting up, a chart drawing, messages travelling, steps turning green, a title assembling. No storyboard of many scenes.
  • Seamless loop: wrap everything in win(t, 0, DURATION, 0.5) so the frame fades from and back to the bare background; the first and last frames then match.
  • Readable small: it will be seen at 600 to 800 px wide. Titles 60 px or more and body text 24 px or more in the 1920 design space; few words; strong contrast.
  • GIF-friendly colours: flat fills and soft gradients compress well; avoid full-screen noise, photos and long blurred motion. The drifting blobs are fine.
  • Same style and motion rules as the videos (../video-engine/references/style.md).

Make it

E=../video-engine   # this skill's sibling folder
node $E/scripts/shots.mjs loop.html sheet.jpg 1 3 5 7 --cols 4 --tile 480   # check
node $E/scripts/gif.mjs --in loop.html --out preview.gif --width 800 --fps 15 --max-mb 3

gif.mjs also takes an MP4 (--in demo.mp4 --from 18 --to 25) to cut a GIF from a finished video. It renders the page at twice the GIF width, builds a palette from the clip, and steps the fps and then the width down until the file fits --max-mb.

Check and deliver

Look at two or three frames of the GIF itself (ffmpeg -i preview.gif -vf "select='eq(n\,60)'" -frames:v 1 f.png): banding, dithering noise and unreadable text show only there. Report the size, width and fps. For GitHub READMEs keep each GIF under about 3 MB, or link a poster to the MP4 instead.

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