Karaoke

Each word fills with colour left to right exactly as it is spoken, with the whole phrase readable before the voice reaches it

Installation
$ pnpm dlx shadcn@latest add @remocn/caption-karaoke

Usage

CaptionKaraoke takes a timed transcript and renders only the text block, so place it inside your own AbsoluteFill. See Positioning for safe placements and Get a transcript for producing captions.json.

import { AbsoluteFill } from "remotion";
import { CaptionKaraoke } from "@/components/remocn/caption-karaoke";
import captions from "./captions.json";
 
export const MyScene = () => (
  <AbsoluteFill
    style={{
      justifyContent: "flex-end",
      alignItems: "center",
      paddingBottom: 108,
      paddingInline: 192,
    }}
  >
    <CaptionKaraoke captions={captions} />
  </AbsoluteFill>
);
Props
PropTypeDefaultDescription
captions
Caption[]—The timed transcript, in the `Caption` shape from `@remotion/captions`. Times are relative to the start of the surrounding `Sequence`.
combineTokensWithinMilliseconds
number1200How much speech one page may span before the next word starts a new page. Pages also break at the end of a sentence and on any pause of at least `holdMs` (300 ms minimum).
holdMs
number600How long a page stays after its last word when the next page is not already due. It fades out at the end of the hold instead of hanging through the pause.
fontSize
number64Font size in pixels.
fontWeight
number800Font weight. The font itself is inherited.
color
string"#ffffff"Colour of words the voice has not reached yet.
activeColor
string"#facc15"Colour that fills each word as it is spoken.
shadow
booleantrueA tight text shadow that keeps the caption legible over bright footage.
className
string—Classes for the text block — width, font family, `uppercase`.