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bloxy-studiosbloxy-studios/shorts-studio/skills/captions/SKILL.md

captions

Skill0 starsChanged 42 days agoMITView on GitHub

Word-accurate captions on the final timeline: whisper.cpp word timings retimed through the EditPlan time map, readable 1–3-word chunks balanced by measured font metrics, selectable designs (clean, bold-pop, word-highlight, editorial, playful, luxury-tech), semantic or cadence emphasis, per-run safe zones, frame-exact animation, word corrections, and SRT/VTT/word-JSON exports.

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SKILL.md

Captions

Rules: ${CLAUDE_PLUGIN_ROOT}/references/rules.md · CLI: ${CLAUDE_PLUGIN_ROOT}/references/cli.md. ss = "${CLAUDE_PLUGIN_ROOT}/bin/shorts-studio". Input: $ARGUMENTS

0. Engine check

The commands below run the Shorts Studio engine. Installed as the Claude Code plugin it is already present and shorts-studio is on the Bash PATH. If shorts-studio doctor is not found (for example, this skill was added with npx skills add), ask the user before installing anything, then:

  • Claude Code: /plugin marketplace add bloxy-studios/shorts-studio → /plugin install shorts-studio@shorts-studio.
  • Other agents: git clone --depth 1 https://github.com/bloxy-studios/shorts-studio ~/.shorts-studio/engine and read every ${CLAUDE_PLUGIN_ROOT} path below as ~/.shorts-studio/engine.

Then run shorts-studio doctor --setup once (project-local runtime; never sudo or global installs).

Steps

  1. Choose a style from real frames: ss preview captions <project> --range <start-end> → read caption-styles.jpg → AskUserQuestion (guided) or pick by preset (autonomous, logged).
  2. Apply: ss revise <project> --clip <id> --reason "…" --op '{"op":"caption-style","styleId":"bold-pop"}'. Emphasis: {"op":"caption-emphasis","keywords":["Artemis"],"onlyKeywords":false}; corrections: {"op":"caption-correct","from":"Artemus","to":"Artemis"}; placement: caption-zone.
  3. Render; QA measures caption onsets against speech in the final mix (captions.sync), safe-area margins, face collisions, and (Luxury) zones and semantic highlights. Read the frames.
  4. Subtitles ship with every render: captions.srt, captions.vtt, captions.words.json.

Rules that are enforced

  • Timings come from the time map — never shifted by animation delays to hide drift; fix the map.
  • Highlights only on meaningful words, never consecutive chunks (Luxury: Instrument Serif Italic #FFFF00 — the real italic; there is no bold face and none is synthesized).
  • Captions start after the cover frame where the preset uses one.

Limits

whisper.cpp word timings are typically 20–80 ms; at the end of a VAD chunk they can drift and are re-timed inside the measured speech (flagged time-adjusted); QA reports chunks that still miss speech.

Completion check

captions.sync has no failure; highlights/zones checks pass; the exported SRT matches the burned-in words.

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