Speed up
Investigation on using Claude Code to automatically generate profitable YouTube videos.
npx -y skills add jperrello/C0BALT_CUT --skill speed-upAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.
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What its author says it does
Copied from the file, not written here
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.
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;1.25ships ~20% faster. Read from arg 3 or theSPEEDenv (default1.25).- Video is retimed with
setpts=PTS/SPEED; audio withatempo(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 isTITLE_SWAP / SPEED. - Deterministic (no Claude), idempotent (
.spmetamtime+param signature), non-fatal (probe/ffmpeg failure → passthrough copy). SPEED=1orSPEED_UP=0→ passthrough.