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Speed up

Skill jperrello/C0BALT_CUT/.claude/skills/speed-up

Globally retime a finished short by SPEED (default 1.25x) — the LAST step of the per-span edit chain. Video setpts + pitch-corrected audio atempo, so every relative beat (captions, zoom punches, b-roll windows, CTA, end-card) compresses uniformly and stays in sync. Deterministic, non-fatal. SPEED=1 or SPEED_UP=0 passes through.From its SKILL.md

Install
npx -y skills add jperrello/C0BALT_CUT --skill speed-up

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

2 things to look at

  • no licenseNo license file was found in the repository. Code published without one is not open source by default, so using it at work is a question for whoever answers licensing questions where you are.
  • 2 stars2 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

SKILL.md

1.3 KB, 285 tokens by cl100k_base, as published. Nobody here has run it

speed-up

Final retime of a finished short. Runs AFTER end-card and BEFORE qc-clip so the QC gate and visual-cadence measure (and save-local saves) the actual delivered, sped-up clip.

speed-up.sh <in.mp4> <out.mp4> [speed=1.25]
  • speed — playback multiplier; 1.25 ships ~20% faster. Read from arg 3 or the SPEED env (default 1.25).
  • Video is retimed with setpts=PTS/SPEED; audio with atempo (chained into 0.5–2.0 stages for out-of-range speeds) so pitch is preserved.
  • Because it is a single uniform retime applied last, ALL upstream relative timing is preserved — nothing else in the pipeline needs to know about it. Note the cold-open title hold (TITLE_SWAP) is set pre-speed, so its on-screen time is TITLE_SWAP / SPEED.
  • Deterministic (no Claude), idempotent (.spmeta mtime+param signature), non-fatal (probe/ffmpeg failure → passthrough copy).
  • SPEED=1 or SPEED_UP=0 → passthrough.

What ships with it: 1 file

2.8 KB alongside SKILL.md, 1 of them executable

Keep looking

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