Slice

Each word arrives cut in two, the top half sliding in from the left and the bottom from the right, locking together the moment it is spoken

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

Usage

CaptionSlice builds the phrase word by word as it is spoken. Each word is cut horizontally through the middle of the line: at the moment the voice reaches it, the top half slides in from the left and the bottom half from the right, and the two lock into one clean word. Words the voice has not reached yet keep their space, so the line never shifts as it builds.

The component renders only the text block. See Positioning for safe placements and Get a transcript for producing captions.json.

import { AbsoluteFill } from "remotion";
import { CaptionSlice } from "@/components/remocn/caption-slice";
import captions from "./captions.json";
 
export const MyScene = () => (
  <AbsoluteFill
    style={{
      justifyContent: "flex-end",
      alignItems: "center",
      paddingBottom: 108,
      paddingInline: 192,
    }}
  >
    <CaptionSlice 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"Text colour.
distance
number0.6How far each half starts from its final place, in em. Larger values read as a harder cut.
shadow
booleantrueA tight text shadow that keeps the caption legible over bright footage.
className
string—Classes for the text block — width, font family, `uppercase`.