Remotion MarkupSAFE

Agent Skills

The instruction file, verbatim from the audited commit — this is the text the model reads, and the surface the audit's instruction layer examines. Quoted here so you can judge it without cloning anything.

---
name: remotion-markup
description: Content, animation and effects best practices
version: 4.0.539
---

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

## Preserve user changes

Users may make edits in the code outside of the conversation.

If you detect a surprising change made in the meanwhile, don't overwrite it, assume it was intentional or ask for confirmation.

## General rules

Keep `useCurrentFrame()` in the smallest component that needs it. Extract
frame-dependent audio volume, titles, and overlays into their own components
instead of subscribing the whole composition or scene; otherwise unrelated
descendants re-render on every frame. Preserve the existing frame coordinates
when extracting across timing boundaries, and keep editable interpolations
inline on the item's props.

Inside a composition or scene component, get `fps` from `useVideoConfig()` for
all seconds-to-frames calculations, including timing props such as `from`,
`trimBefore` and `durationInFrames`. Keeping the expression on
the JSX node, such as `trimBefore={4 * fps}`, lets Studio edit the timing and
keeps it correct if the composition frame rate changes.

Drive animations using `useCurrentFrame()` and `interpolate()`.  
CSS `transition` or `animation` will not render correctly, they need to refactored.  
Tailwind animation class will not render correctly, they need to be refactored.

Use `Easing.bezier()` and `Easing.spring()` to customize timing.

Before choosing the markup hierarchy, read
editable timeline structure.
Choose editing units first, then the tracks or shared timing boundaries they
need. It includes a complete example with interactive components and their
registrations. For source-editable styles, schemas, and keyframes, see
Remotion Interactivity.

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

export const FadeIn = () => {
  const frame = useCurrentFrame();
  const {fps} = useVideoConfig();

  return (
    <Interactive.Div
      name="Title"
      style={{
        opacity: interpolate(frame, [0, 2 * fps], [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.
Use `scale`, `translate`, `rotate` CSS properties over `transform`.

```tsx
// 👍 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}),
  }),
}}

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

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

## Assets

Place assets in the `public/` folder at your project root.
Use `staticFile()` to reference files from the `public/` folder.

## Media components

Add video and audio using `<Video>` and `<Audio>` from `@remotion/media`.  
Add images using the `<CanvasImage>` component.
Add animated GIFs, APNG, WebP or AVIF images using `<AnimatedImage>`, use `@remotion/gif` if not using Chrome.
Use `staticFile()` for files in `public/` or pass a remote URL directly:

```tsx
import { Audio, Video } from "@remotion/media";
import { staticFile, CanvasImage, AnimatedImage } 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" />
      <AnimatedImage src={staticFile('nyancat.gif')} />
    </>
  );
};
```

If the composition is primarily a timeline of video or audio clips, read
[video-editing.md](video-editing.md) before choosing its source structure.

## Delaying, trimming

Use [sequencing](sequencing.md) to choose the timing boundary and
[timing props](timing-props.md) for the supported props and order of operations.

## Maps

See [Remotion Maps](./remotion-maps/REFERENCE.md) if wanting to include maps in the video.

## Text highlights and annotations

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

## Multi-scene videos

See [multi-scene-video.md](multi-scene-video.md) if planning to make a video with multiple subsequent scenes.

## Connected compositions

Read [connected compositions](connected-compositions.md) when a scene or group
needs its own editable timeline, or when handling a Studio pre-compose request.
It covers extraction, registration, inherited styles, and verification in both
the parent and standalone views.

## Voiceover

See [voiceover.md](voiceover.md) for adding an AI-generated voiceover to Remotion compositions using ElevenLabs TTS.

## Embedding Videos

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

## Embedding Audio

See [audio.md](audio.md) for advanced audio features like trimming, volume, speed, pitch.

## Cropping

See [cropping.md](cropping.md) if needing to crop the visible rectangle of a component.

## Transitions

See [transitions.md](transitions.md) for scene transition patterns.

## Motion blur

SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.

What the source does

Filesystem

none-observed

Network

none-observed

Shell

none-observed

Dependencies

pinned

Secrets in source

none-found

Findings (1)

Gates applied: no_behavioural_pass, no_license.

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