ecmanim-captions-audio

name	ecmanim-captions-audio
description	Add burned-in captions and audio-reactive visuals to ecmanim scenes — SRT parse/serialize, TikTok-style word-by-word karaoke caption pages, an on-screen CaptionTrack overlay, and audio analysis (PCM decode, FFT/getAudioData/visualizeAudio, waveform slices) for spectrum bars, oscilloscopes, and audio-synced motion. Use this skill when the user wants subtitles, karaoke-style text reveal, TikTok captions, or bars/waveforms that react to a music/voice track.
metadata	{"tags":"ecmanim, captions, srt, karaoke, audio, fft, waveform"}

ecmanim-captions-audio

Child skill of ecmanim (read ../ecmanim/SKILL.md first for the shared Plan→Code→Render→Verify→Iterate loop and checkhealth-first convention — not repeated here). This skill covers two adjacent, isomorphic (Node + browser) features ported from Remotion: captions (@remotion/captions-style SRT + karaoke) and audio-reactive visuals (@remotion/media-utils-style FFT). Full detail: ../../docs/captions-audio.md — read it before asserting an API shape; this file only orients you.

Captions

Everything lives in src/captions/ and is exported from the package root:

import { parseSrt, serializeSrt, createTikTokStyleCaptions, captionAt, CaptionTrack } from "ecmanim";
import type { , ,  }  ;