Files
ncmr-songs-videos/package.json
T
mikkeli 04963c929a feat(274): spectrum outro for the transect
From SPECTRUM_START_S the nodes stop following the lyric and behave as a
spectrum analyser: every sung node is given one log-spaced frequency band
(40 Hz–12 kHz), dealt out in a seeded shuffle, and sizes up and down with that
band's amplitude.

- spectrum.ts: band maths and every tunable. Levels come from
  @remotion/media-utils visualizeAudio on audio loaded by
  useWindowedAudioData (10 s windows, so the 227 MB WAV is never decoded
  whole; before the outro the window stays parked at its start). Bands average
  the FFT bins they span, or interpolate for bands narrower than a bin, so
  neighbouring bass nodes never move in lockstep. Level =
  (raw × GAIN × (f/40 Hz)^TREBLE_TILT)^CURVE with a release that looks back
  RELEASE_FRAMES frames at RELEASE_DECAY per frame. Defaults were calibrated
  on the release2 outro (nodes pinned at full size 0.6% of the time). The
  node→band mapping uses Remotion's seeded random() (BAND_SEED), not
  Math.random(), so render tabs and the Studio agree.
- nodeAnimation.ts: SPECTRUM_PEAK and spectrumLook(level), alongside lightUp
  and switchOff, plus a levelExponential shaping curve.
- Transect.tsx: hands each node over from its lyric look to its spectrum look
  over SPECTRUM_FADE_S.
- package.json: declare @remotion/media-utils 4.0.522 (already installed as a
  dependency of the CLI; now pinned alongside the other Remotion packages).

Verified: eslint + tsc clean on this commit's tree; outro stills show nodes
sized by band level, so the windowed audio loads during renders.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PLt25nCVMsoroKALYUBu6u
2026-09-17 10:31:58 +09:00

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JSON

{
"name": "ncmr-songs-videos",
"version": "0.1.0",
"description": "Video production templates for NCMR songs — Remotion project, ffmpeg helpers, and subtitle tools",
"private": true,
"license": "UNLICENSED",
"dependencies": {
"@remotion/cli": "4.0.522",
"@remotion/media-utils": "4.0.522",
"@remotion/tailwind-v4": "4.0.522",
"react": "19.2.3",
"react-dom": "19.2.3",
"remotion": "4.0.522",
"tailwindcss": "4.0.0"
},
"devDependencies": {
"@remotion/eslint-config-flat": "4.0.522",
"@types/react": "19.2.7",
"@types/web": "0.0.166",
"eslint": "9.19.0",
"prettier": "3.8.1",
"typescript": "5.9.3"
},
"scripts": {
"dev": "remotion studio",
"build": "remotion bundle",
"upgrade": "remotion upgrade",
"lint": "eslint src && tsc"
},
"sideEffects": [
"*.css"
]
}