🎨 Add new Flux icons: implement multiple reusable icon components (e.g., hand-raised, hand-thumb-up, heart, hashtag, home) with variant support for improved UI consistency.

videos/.opencode/skills/remotion-best-practices/rules/calculate-metadata.md

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+---
+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 the `getMediaMetadata()` function from the mediabunny/metadata skill to get the video duration:
+
+```tsx
+import {CalculateMetadataFunction} from 'remotion';
+import {getMediaMetadata} from '../get-media-metadata';
+
+const calculateMetadata: CalculateMetadataFunction<Props> = async ({props}) => {
+  const {durationInSeconds} = await getMediaMetadata(props.videoSrc);
+
+  return {
+    durationInFrames: Math.ceil(durationInSeconds * 30),
+  };
+};
+```
+
+## Matching dimensions of a video
+
+```tsx
+const calculateMetadata: CalculateMetadataFunction<Props> = async ({props}) => {
+  const {durationInSeconds, dimensions} = await getMediaMetadata(props.videoSrc);
+
+  return {
+    durationInFrames: Math.ceil(durationInSeconds * 30),
+    width: dimensions?.width ?? 1920,
+    height: dimensions?.height ?? 1080,
+  };
+};
+```
+
+## Setting duration based on multiple videos
+
+```tsx
+const calculateMetadata: CalculateMetadataFunction<Props> = async ({props}) => {
+  const metadataPromises = props.videos.map((video) => getMediaMetadata(video.src));
+  const allMetadata = await Promise.all(metadataPromises);
+
+  const totalDuration = allMetadata.reduce((sum, meta) => sum + meta.durationInSeconds, 0);
+
+  return {
+    durationInFrames: Math.ceil(totalDuration * 30),
+  };
+};
+```
+
+## Setting a default outName
+
+Set the default output filename based on props:
+
+```tsx
+const calculateMetadata: CalculateMetadataFunction<Props> = async ({props}) => {
+  return {
+    defaultOutName: `video-${props.id}.mp4`,
+  };
+};
+```
+
+## Transforming props
+
+Fetch data or transform props before rendering:
+
+```tsx
+const calculateMetadata: CalculateMetadataFunction<Props> = async ({props, abortSignal}) => {
+  const response = await fetch(props.dataUrl, {signal: abortSignal});
+  const data = await response.json();
+
+  return {
+    props: {
+      ...props,
+      fetchedData: data,
+    },
+  };
+};
+```
+
+The `abortSignal` cancels stale requests when props change in the Studio.
+
+## Return value
+
+All fields are optional. Returned values override the `<Composition>` props:
+
+- `durationInFrames`: Number of frames
+- `width`: Composition width in pixels
+- `height`: Composition height in pixels
+- `fps`: Frames per second
+- `props`: Transformed props passed to the component
+- `defaultOutName`: Default output filename
+- `defaultCodec`: Default codec for rendering