polskalokalnie/.agents/skills/remotion-markup/SKILL.md

name, description, metadata

name	description	metadata
remotion-markup	Content, animation and effects best practices	tags remotion, react, markup

This is guidance for writing Remotion React Markup. If this is not relevant, load Remotion Best Practices instead.

General rules

Animate properties using useCurrentFrame() and interpolate().

Use Easing.bezier() to customize timing, including jumpy or overshooting motion. Use Easing.spring() if you want spring animations.

Structure your markup according to Remotion Interactivity Best Practices

import { useCurrentFrame, Easing, interpolate, Interactive } from "remotion";

export const FadeIn = () => {
  const frame = useCurrentFrame();

  return (
    <Interactive.Div
      name="Title"
      style={{
        opacity: interpolate(frame, [0, 60], [0, 1], {
          extrapolateRight: "clamp",
          extrapolateLeft: "clamp",
          easing: Easing.bezier(0.16, 1, 0.3, 1),
        }),
      }}
    >
      Hello World!
    </Interactive.Div>
  );
};

Keep the interpolate() call inline in the style prop. Prefer scale, translate, rotate CSS properties over transform.

// 👍 Inline editable keyframes and transform shorthands
style={{
  scale: interpolate(frame, [0, 100], [0, 1], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
    easing: Easing.spring({damping: 200}),
    output: 'perceptual-scale' // For `scale` animations, use "output: 'perceptual-scale'"
  }),
  translate: interpolate(frame, [0, 100], ["0px 0px", "100px 100px"], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
    easing: Easing.spring({damping: 200}),
  }),
  rotate: interpolate(frame, [0, 100], ["20deg", "90deg"], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
    easing: Easing.spring({damping: 200}),
  }),
}}

// 👎 Hidden values and transform strings become harder to edit in Studio
const scale = interpolate(frame, [0, 100], [0, 1]);

style={{
  transform: `scale(${scale})`,
}}

CSS transitions or animations are FORBIDDEN - they will not render correctly.
Tailwind animation class names are FORBIDDEN - they will not render correctly.

Place assets in the public/ folder at your project root.

Use staticFile() to reference files from the public/ folder.

Add video and audio using @remotion/media.
Add images using the <CanvasImage> component. Use staticFile() for files in public/ or pass a remote URL directly:

import { Audio, Video } from "@remotion/media";
import { staticFile, CanvasImage } from "remotion";

export const MyComposition = () => {
  return (
    <>
      <Video src={staticFile("video.mp4")} style={{ opacity: 0.5 }} />
      <Audio src={staticFile("audio.mp3")} />
      <CanvasImage src={staticFile("logo.png")} style={{ width: 100, height: 100 }} />
      <Video src="https://remotion.media/video.mp4" />
    </>
  );
};

Cropping

See cropping.md for supported components, crop props, Studio controls, animation, and custom component support.

To delay content wrap it in <Sequence> and use from. To limit the duration of an element, use durationInFrames of <Sequence>. <Sequence> by default is an absolute fill covering the scene.
For inline content, use layout="none".

const Main = () => {
  const {fps} = useVideoConfig();

  return (
    <AbsoluteFill>
      <Background />
      <AbsoluteFill>
        <Sequence name="Title" from={30} durationInFrames={60} layout="none">
          <Title />
        </Sequence>
        <Sequence name="Subtitle" from={60} durationInFrames={60} layout="none">
          <Subtitle />
        </Sequence>
      </AbsoluteFill>
    </AbsoluteFill>
  );
}

export const Title = () => {
  const frame = useCurrentFrame();

  return (
    <Interactive.Div
      name="Label"
      style={{
        opacity: interpolate(frame, [0, 60], [0, 1], {
          extrapolateRight: "clamp",
          extrapolateLeft: "clamp",
          easing: Easing.bezier(0.16, 1, 0.3, 1),
        }),
        fontSize: 88
      }}
    >
      Title
    </Interactive.Div>
  );
};

export const Subtitle = () => {
  const frame = useCurrentFrame();

  return (
    <Interactive.Div
      name="Subtitle"
      style={{
        opacity: interpolate(frame, [0, 60], [0, 1], {
          extrapolateRight: "clamp",
          extrapolateLeft: "clamp",
          easing: Easing.bezier(0.16, 1, 0.3, 1),
        }),
        fontSize: 32
      }}
    >
      Subtitle
    </Interactive.Div>
  );
};

Maps

See Remotion Maps for choosing a map technique.

Text highlights and annotations

See text-highlights.md for text highlights (highlight markers), circles, underlines, strike-throughs, crossed-off text, boxes, and brackets.

Voiceover

See voiceover.md for adding AI-generated voiceover to Remotion compositions using ElevenLabs TTS.

Trimming

See trimming.md for trimming patterns - cutting the beginning or end of animations.

Embedding Videos

See embedding-videos.md for advanced knowledge about embedding videos - trimming, volume, speed, looping, pitch.

Video editing

See video-editing.md for structuring editable video timelines in Remotion Studio.

Embedding Audio

See audio.md for advanced audio features like trimming, volume, speed, pitch.

Transitions

See transitions.md for scene transition patterns.

Visual and pixel effects

When creating a visual effect, consider whether it is feasible using CSS and HTML, or whether a shader is needed. Order or preference:

1. Normal Remotion/HTML/CSS/SVG/filter/blend/mask animation
2. An effect applied to the element directly (<Video>, <Img>), or by wrapping the content in <HtmlInCanvas>, which also accepts effects:

• A listed effect via effects.md
• A custom createEffect() via effects.md when no preset is available.

3D content

See 3d.md for 3D content in Remotion using Three.js and React Three Fiber.

Sound effects

When needing to use sound effects, load the ./sfx.md file for more information.

Audio visualization

When needing to visualize audio (spectrum bars, waveforms, bass-reactive effects), load the ./audio-visualization.md file for more information.

Maps

For static maps, animated routes and markers, geographic explainers, Mapbox, MapLibre, MapTiler, GeoJSON, or 3D geographic flyovers, load Remotion Maps.

Captions

When dealing with captions or subtitles, load the Remotion Captions skill for more information.

Google Fonts

Is the recommended way to load fonts in Remotion. See google-fonts.md for how to load Google Fonts.

Local fonts

See local-fonts.md for how to load local fonts.

GIFs

See gifs.md for how to display GIFs synchronized with Remotion's timeline.

Advanced Images

See images.md for sizing and positioning images, dynamic image paths, and getting image dimensions.

Lottie animations

See lottie.md for embedding Lottie animations in Remotion.

Advanced timing

See timing.md for advanced timing with interpolate and Bézier easing, and springs.

Parameterized videos

See parameters.md for making a composition parametrizable by adding a Zod schema.

Measuring DOM nodes

See measuring-dom-nodes.md for measuring DOM element dimensions in Remotion.

Measuring text

See measuring-text.md for measuring text dimensions, fitting text to containers, and checking overflow.

Using FFmpeg

For some video operations, such as trimming videos or detecting silence, FFmpeg should be used. Load the ./ffmpeg.md file for more information.

Silence detection

When needing to detect and trim silent segments from video or audio files, load the ./silence-detection.md file.

Dynamic duration, dimensions and data

See calculate-metadata.md for dynamically set composition duration, dimensions, and props.

Advanced compositions

See compositions.md for how to define stills, folders, default props and for how to nest compositions.

Advanced sequencing

See sequencing.md for more sequencing patterns - delay, trim, limit duration of items.

Install modules

Use npx remotion add to add new packages with the right version:

npx remotion add @remotion/media

This goes for @remotion/* packages, mediabunny, @mediabunny/*, and zod.

Previewing markup

This will start a long-running process and print the server URL for the preview.
If server is already started, it will print the URL. You can visit a specific composition by navigating to /[composition-id], for example http://localhost:3000/MapAnimation.

Optional: one-frame render check

You can render a single frame with the CLI to sanity-check layout, colors, or timing.
Skip it for trivial edits, pure refactors, or when you already have enough confidence from Studio or prior renders.

npx remotion still [composition-id] --scale=0.25 --frame=30

At 30 fps, --frame=30 is the one-second mark (--frame is zero-based).