calculate-metadata

Dynamically set composition duration, dimensions, and props

Skills
Video
0

What it does and how to use it

A skill that teaches Claude Code to do video tasks well. It is packaged knowledge the model uses whenever it is relevant.

Install the skill (command above).
In Claude Code, describe what you need - the skill turns on by itself when the context fits.
No commands to memorize: you talk in plain language and the skill does the rest.

Install (Claude Code)

mkdir -p .claude/skills/calculate-metadata && curl -fsSL https://doutorai.pt/data/lib/skills__calculate-metadata.md -o .claude/skills/calculate-metadata/SKILL.md

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

---
name: calculate-metadata
description: Dynamically set composition duration, dimensions, and props
metadata:
  tags: calculateMetadata, duration, dimensions, props, dynamic
---

# Using calculateMetadata

Use `calculateMetadata` on a `<Composition>` to dynamically set duration, dimensions, and transform props before rendering.

```tsx
<Composition id="MyComp" component={MyComponent} durationInFrames={300} fps={30} width={1920} height={1080} defaultProps={{videoSrc: 'https://remotion.media/video.mp4'}} calculateMetadata={calculateMetadata} />
```

## Setting duration based on a video

Use th

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