上传文件至「rules」

rules/3d.md

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+---
+name: 3d
+description: 3D content in Remotion using Three.js and React Three Fiber.
+metadata:
+  tags: 3d, three, threejs
+---
+
+# Using Three.js and React Three Fiber in Remotion
+
+Follow React Three Fiber and Three.js best practices.  
+Only the following Remotion-specific rules need to be followed:
+
+## Prerequisites
+
+First, the `@remotion/three` package needs to be installed.  
+If it is not, use the following command:
+
+```bash
+npx remotion add @remotion/three # If project uses npm
+bunx remotion add @remotion/three # If project uses bun
+yarn remotion add @remotion/three # If project uses yarn
+pnpm exec remotion add @remotion/three # If project uses pnpm
+```
+
+## Using ThreeCanvas
+
+You MUST wrap 3D content in `<ThreeCanvas>` and include proper lighting.  
+`<ThreeCanvas>` MUST have a `width` and `height` prop.
+
+```tsx
+import { ThreeCanvas } from "@remotion/three";
+import { useVideoConfig } from "remotion";
+
+const { width, height } = useVideoConfig();
+
+<ThreeCanvas width={width} height={height}>
+  <ambientLight intensity={0.4} />
+  <directionalLight position={[5, 5, 5]} intensity={0.8} />
+  <mesh>
+    <sphereGeometry args={[1, 32, 32]} />
+    <meshStandardMaterial color="red" />
+  </mesh>
+</ThreeCanvas>
+```
+
+## No animations not driven by `useCurrentFrame()`
+
+Shaders, models etc MUST NOT animate by themselves.  
+No animations are allowed unless they are driven by `useCurrentFrame()`.  
+Otherwise, it will cause flickering during rendering.  
+
+Using `useFrame()` from `@react-three/fiber` is forbidden.
+
+## Animate using `useCurrentFrame()`
+
+Use `useCurrentFrame()` to perform animations.
+
+```tsx
+const frame = useCurrentFrame();
+const rotationY = frame * 0.02;
+
+<mesh rotation={[0, rotationY, 0]}>
+  <boxGeometry args={[2, 2, 2]} />
+  <meshStandardMaterial color="#4a9eff" />
+</mesh>
+```
+
+## Using `<Sequence>` inside `<ThreeCanvas>`
+
+The `layout` prop of any `<Sequence>` inside a `<ThreeCanvas>` must be set to `none`.
+
+```tsx
+import { Sequence } from "remotion";
+import { ThreeCanvas } from "@remotion/three";
+
+const { width, height } = useVideoConfig();
+
+<ThreeCanvas width={width} height={height}>
+  <Sequence layout="none">
+    <mesh>
+      <boxGeometry args={[2, 2, 2]} />
+      <meshStandardMaterial color="#4a9eff" />
+    </mesh>
+  </Sequence>
+</ThreeCanvas>
+```

rules/animations.md

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+---
+name: animations
+description: Fundamental animation skills for Remotion
+metadata:
+  tags: animations, transitions, frames, useCurrentFrame
+---
+
+All animations MUST be driven by the `useCurrentFrame()` hook.  
+Write animations in seconds and multiply them by the `fps` value from `useVideoConfig()`.
+
+```tsx
+import { useCurrentFrame } from "remotion";
+
+export const FadeIn = () => {
+  const frame = useCurrentFrame();
+  const { fps } = useVideoConfig();
+
+  const opacity = interpolate(frame, [0, 2 * fps], [0, 1], {
+    extrapolateRight: 'clamp',
+  });
+ 
+  return (
+    <div style={{ opacity }}>Hello World!</div>
+  );
+};
+```
+
+CSS transitions or animations are FORBIDDEN - they will not render correctly.  
+Tailwind animation class names are FORBIDDEN - they will not render correctly.  

rules/assets.md

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+---
+name: assets
+description: Importing images, videos, audio, and fonts into Remotion
+metadata:
+  tags: assets, staticFile, images, fonts, public
+---
+
+# Importing assets in Remotion
+
+## The public folder
+
+Place assets in the `public/` folder at your project root.
+
+## Using staticFile()
+
+You MUST use `staticFile()` to reference files from the `public/` folder:
+
+```tsx
+import {Img, staticFile} from 'remotion';
+
+export const MyComposition = () => {
+  return <Img src={staticFile('logo.png')} />;
+};
+```
+
+The function returns an encoded URL that works correctly when deploying to subdirectories.
+
+## Using with components
+
+**Images:**
+
+```tsx
+import {Img, staticFile} from 'remotion';
+
+<Img src={staticFile('photo.png')} />;
+```
+
+**Videos:**
+
+```tsx
+import {Video} from '@remotion/media';
+import {staticFile} from 'remotion';
+
+<Video src={staticFile('clip.mp4')} />;
+```
+
+**Audio:**
+
+```tsx
+import {Audio} from '@remotion/media';
+import {staticFile} from 'remotion';
+
+<Audio src={staticFile('music.mp3')} />;
+```
+
+**Fonts:**
+
+```tsx
+import {staticFile} from 'remotion';
+
+const fontFamily = new FontFace('MyFont', `url(${staticFile('font.woff2')})`);
+await fontFamily.load();
+document.fonts.add(fontFamily);
+```
+
+## Remote URLs
+
+Remote URLs can be used directly without `staticFile()`:
+
+```tsx
+<Img src="https://example.com/image.png" />
+<Video src="https://remotion.media/video.mp4" />
+```
+
+## Important notes
+
+- Remotion components (`<Img>`, `<Video>`, `<Audio>`) ensure assets are fully loaded before rendering
+- Special characters in filenames (`#`, `?`, `&`) are automatically encoded

rules/audio.md

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+---
+name: audio
+description: Using audio and sound in Remotion - importing, trimming, volume, speed, pitch
+metadata:
+  tags: audio, media, trim, volume, speed, loop, pitch, mute, sound, sfx
+---
+
+# Using audio in Remotion
+
+## Prerequisites
+
+First, the @remotion/media package needs to be installed.
+If it is not installed, use the following command:
+
+```bash
+npx remotion add @remotion/media
+```
+
+## Importing Audio
+
+Use `<Audio>` from `@remotion/media` to add audio to your composition.
+
+```tsx
+import { Audio } from "@remotion/media";
+import { staticFile } from "remotion";
+
+export const MyComposition = () => {
+  return <Audio src={staticFile("audio.mp3")} />;
+};
+```
+
+Remote URLs are also supported:
+
+```tsx
+<Audio src="https://remotion.media/audio.mp3" />
+```
+
+By default, audio plays from the start, at full volume and full length.
+Multiple audio tracks can be layered by adding multiple `<Audio>` components.
+
+## Trimming
+
+Use `trimBefore` and `trimAfter` to remove portions of the audio. Values are in frames.
+
+```tsx
+const { fps } = useVideoConfig();
+
+return (
+  <Audio
+    src={staticFile("audio.mp3")}
+    trimBefore={2 * fps} // Skip the first 2 seconds
+    trimAfter={10 * fps} // End at the 10 second mark
+  />
+);
+```
+
+The audio still starts playing at the beginning of the composition - only the specified portion is played.
+
+## Delaying
+
+Wrap the audio in a `<Sequence>` to delay when it starts:
+
+```tsx
+import { Sequence, staticFile } from "remotion";
+import { Audio } from "@remotion/media";
+
+const { fps } = useVideoConfig();
+
+return (
+  <Sequence from={1 * fps}>
+    <Audio src={staticFile("audio.mp3")} />
+  </Sequence>
+);
+```
+
+The audio will start playing after 1 second.
+
+## Volume
+
+Set a static volume (0 to 1):
+
+```tsx
+<Audio src={staticFile("audio.mp3")} volume={0.5} />
+```
+
+Or use a callback for dynamic volume based on the current frame:
+
+```tsx
+import { interpolate } from "remotion";
+
+const { fps } = useVideoConfig();
+
+return (
+  <Audio
+    src={staticFile("audio.mp3")}
+    volume={(f) =>
+      interpolate(f, [0, 1 * fps], [0, 1], { extrapolateRight: "clamp" })
+    }
+  />
+);
+```
+
+The value of `f` starts at 0 when the audio begins to play, not the composition frame.
+
+## Muting
+
+Use `muted` to silence the audio. It can be set dynamically:
+
+```tsx
+const frame = useCurrentFrame();
+const { fps } = useVideoConfig();
+
+return (
+  <Audio
+    src={staticFile("audio.mp3")}
+    muted={frame >= 2 * fps && frame <= 4 * fps} // Mute between 2s and 4s
+  />
+);
+```
+
+## Speed
+
+Use `playbackRate` to change the playback speed:
+
+```tsx
+<Audio src={staticFile("audio.mp3")} playbackRate={2} /> {/* 2x speed */}
+<Audio src={staticFile("audio.mp3")} playbackRate={0.5} /> {/* Half speed */}
+```
+
+Reverse playback is not supported.
+
+## Looping
+
+Use `loop` to loop the audio indefinitely:
+
+```tsx
+<Audio src={staticFile("audio.mp3")} loop />
+```
+
+Use `loopVolumeCurveBehavior` to control how the frame count behaves when looping:
+
+- `"repeat"`: Frame count resets to 0 each loop (default)
+- `"extend"`: Frame count continues incrementing
+
+```tsx
+<Audio
+  src={staticFile("audio.mp3")}
+  loop
+  loopVolumeCurveBehavior="extend"
+  volume={(f) => interpolate(f, [0, 300], [1, 0])} // Fade out over multiple loops
+/>
+```
+
+## Pitch
+
+Use `toneFrequency` to adjust the pitch without affecting speed. Values range from 0.01 to 2:
+
+```tsx
+<Audio
+  src={staticFile("audio.mp3")}
+  toneFrequency={1.5} // Higher pitch
+/>
+<Audio
+  src={staticFile("audio.mp3")}
+  toneFrequency={0.8} // Lower pitch
+/>
+```
+
+Pitch shifting only works during server-side rendering, not in the Remotion Studio preview or in the `<Player />`.

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

rules/can-decode.md

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+---
+name: can-decode
+description: Check if a video can be decoded by the browser using Mediabunny
+metadata:
+  tags: decode, validation, video, audio, compatibility, browser
+---
+
+# Checking if a video can be decoded
+
+Use Mediabunny to check if a video can be decoded by the browser before attempting to play it.
+
+## The `canDecode()` function
+
+This function can be copy-pasted into any project.
+
+```tsx
+import { Input, ALL_FORMATS, UrlSource } from "mediabunny";
+
+export const canDecode = async (src: string) => {
+  const input = new Input({
+    formats: ALL_FORMATS,
+    source: new UrlSource(src, {
+      getRetryDelay: () => null,
+    }),
+  });
+
+  try {
+    await input.getFormat();
+  } catch {
+    return false;
+  }
+
+  const videoTrack = await input.getPrimaryVideoTrack();
+  if (videoTrack && !(await videoTrack.canDecode())) {
+    return false;
+  }
+
+  const audioTrack = await input.getPrimaryAudioTrack();
+  if (audioTrack && !(await audioTrack.canDecode())) {
+    return false;
+  }
+
+  return true;
+};
+```
+
+## Usage
+
+```tsx
+const src = "https://remotion.media/video.mp4";
+const isDecodable = await canDecode(src);
+
+if (isDecodable) {
+  console.log("Video can be decoded");
+} else {
+  console.log("Video cannot be decoded by this browser");
+}
+```
+
+## Using with Blob
+
+For file uploads or drag-and-drop, use `BlobSource`:
+
+```tsx
+import { Input, ALL_FORMATS, BlobSource } from "mediabunny";
+
+export const canDecodeBlob = async (blob: Blob) => {
+  const input = new Input({
+    formats: ALL_FORMATS,
+    source: new BlobSource(blob),
+  });
+
+  // Same validation logic as above
+};
+```

rules/charts.md

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+---
+name: charts
+description: Chart and data visualization patterns for Remotion. Use when creating bar charts, pie charts, line charts, stock graphs, or any data-driven animations.
+metadata:
+  tags: charts, data, visualization, bar-chart, pie-chart, line-chart, stock-chart, svg-paths, graphs
+---
+
+# Charts in Remotion
+
+Create charts using React code - HTML, SVG, and D3.js are all supported.
+
+Disable all animations from third party libraries - they cause flickering.  
+Drive all animations from `useCurrentFrame()`.
+
+## Bar Chart
+
+```tsx
+const STAGGER_DELAY = 5;
+const frame = useCurrentFrame();
+const { fps } = useVideoConfig();
+
+const bars = data.map((item, i) => {
+  const height = spring({
+    frame,
+    fps,
+    delay: i * STAGGER_DELAY,
+    config: { damping: 200 },
+  });
+  return <div style={{ height: height * item.value }} />;
+});
+```
+
+## Pie Chart
+
+Animate segments using stroke-dashoffset, starting from 12 o'clock:
+
+```tsx
+const progress = interpolate(frame, [0, 100], [0, 1]);
+const circumference = 2 * Math.PI * radius;
+const segmentLength = (value / total) * circumference;
+const offset = interpolate(progress, [0, 1], [segmentLength, 0]);
+
+<circle
+  r={radius}
+  cx={center}
+  cy={center}
+  fill="none"
+  stroke={color}
+  strokeWidth={strokeWidth}
+  strokeDasharray={`${segmentLength} ${circumference}`}
+  strokeDashoffset={offset}
+  transform={`rotate(-90 ${center} ${center})`}
+/>;
+```
+
+## Line Chart / Path Animation
+
+Use `@remotion/paths` for animating SVG paths (line charts, stock graphs, signatures).
+
+Install: `npx remotion add @remotion/paths`  
+Docs: https://remotion.dev/docs/paths.md
+
+### Convert data points to SVG path
+
+```tsx
+type Point = { x: number; y: number };
+
+const generateLinePath = (points: Point[]): string => {
+  if (points.length < 2) return "";
+  return points.map((p, i) => `${i === 0 ? "M" : "L"} ${p.x} ${p.y}`).join(" ");
+};
+```
+
+### Draw path with animation
+
+```tsx
+import { evolvePath } from "@remotion/paths";
+
+const path = "M 100 200 L 200 150 L 300 180 L 400 100";
+const progress = interpolate(frame, [0, 2 * fps], [0, 1], {
+  extrapolateLeft: "clamp",
+  extrapolateRight: "clamp",
+  easing: Easing.out(Easing.quad),
+});
+
+const { strokeDasharray, strokeDashoffset } = evolvePath(progress, path);
+
+<path
+  d={path}
+  fill="none"
+  stroke="#FF3232"
+  strokeWidth={4}
+  strokeDasharray={strokeDasharray}
+  strokeDashoffset={strokeDashoffset}
+/>;
+```
+
+### Follow path with marker/arrow
+
+```tsx
+import {
+  getLength,
+  getPointAtLength,
+  getTangentAtLength,
+} from "@remotion/paths";
+
+const pathLength = getLength(path);
+const point = getPointAtLength(path, progress * pathLength);
+const tangent = getTangentAtLength(path, progress * pathLength);
+const angle = Math.atan2(tangent.y, tangent.x);
+
+<g
+  style={{
+    transform: `translate(${point.x}px, ${point.y}px) rotate(${angle}rad)`,
+    transformOrigin: "0 0",
+  }}
+>
+  <polygon points="0,0 -20,-10 -20,10" fill="#FF3232" />
+</g>;
+```

rules/compositions.md

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+---
+name: compositions
+description: Defining compositions, stills, folders, default props and dynamic metadata
+metadata:
+  tags: composition, still, folder, props, metadata
+---
+
+A `<Composition>` defines the component, width, height, fps and duration of a renderable video.
+
+It normally is placed in the `src/Root.tsx` file.
+
+```tsx
+import {Composition} from 'remotion';
+import {MyComposition} from './MyComposition';
+
+export const RemotionRoot = () => {
+  return <Composition id="MyComposition" component={MyComposition} durationInFrames={100} fps={30} width={1080} height={1080} />;
+};
+```
+
+## Default Props
+
+Pass `defaultProps` to provide initial values for your component.  
+Values must be JSON-serializable (`Date`, `Map`, `Set`, and `staticFile()` are supported).
+
+```tsx
+import {Composition} from 'remotion';
+import {MyComposition, MyCompositionProps} from './MyComposition';
+
+export const RemotionRoot = () => {
+  return (
+    <Composition
+      id="MyComposition"
+      component={MyComposition}
+      durationInFrames={100}
+      fps={30}
+      width={1080}
+      height={1080}
+      defaultProps={
+        {
+          title: 'Hello World',
+          color: '#ff0000',
+        } satisfies MyCompositionProps
+      }
+    />
+  );
+};
+```
+
+Use `type` declarations for props rather than `interface` to ensure `defaultProps` type safety.
+
+## Folders
+
+Use `<Folder>` to organize compositions in the sidebar.  
+Folder names can only contain letters, numbers, and hyphens.
+
+```tsx
+import {Composition, Folder} from 'remotion';
+
+export const RemotionRoot = () => {
+  return (
+    <>
+      <Folder name="Marketing">
+        <Composition id="Promo" /* ... */ />
+        <Composition id="Ad" /* ... */ />
+      </Folder>
+      <Folder name="Social">
+        <Folder name="Instagram">
+          <Composition id="Story" /* ... */ />
+          <Composition id="Reel" /* ... */ />
+        </Folder>
+      </Folder>
+    </>
+  );
+};
+```
+
+## Stills
+
+Use `<Still>` for single-frame images. It does not require `durationInFrames` or `fps`.
+
+```tsx
+import {Still} from 'remotion';
+import {Thumbnail} from './Thumbnail';
+
+export const RemotionRoot = () => {
+  return <Still id="Thumbnail" component={Thumbnail} width={1280} height={720} />;
+};
+```
+
+## Calculate Metadata
+
+Use `calculateMetadata` to make dimensions, duration, or props dynamic based on data.
+
+```tsx
+import {Composition, CalculateMetadataFunction} from 'remotion';
+import {MyComposition, MyCompositionProps} from './MyComposition';
+
+const calculateMetadata: CalculateMetadataFunction<MyCompositionProps> = async ({props, abortSignal}) => {
+  const data = await fetch(`https://api.example.com/video/${props.videoId}`, {
+    signal: abortSignal,
+  }).then((res) => res.json());
+
+  return {
+    durationInFrames: Math.ceil(data.duration * 30),
+    props: {
+      ...props,
+      videoUrl: data.url,
+    },
+  };
+};
+
+export const RemotionRoot = () => {
+  return (
+    <Composition
+      id="MyComposition"
+      component={MyComposition}
+      durationInFrames={100} // Placeholder, will be overridden
+      fps={30}
+      width={1080}
+      height={1080}
+      defaultProps={{videoId: 'abc123'}}
+      calculateMetadata={calculateMetadata}
+    />
+  );
+};
+```
+
+The function can return `props`, `durationInFrames`, `width`, `height`, `fps`, and codec-related defaults. It runs once before rendering begins.
+
+## Nesting compositions within another
+
+To add a composition within another composition, you can use the `<Sequence>` component with a `width` and `height` prop to specify the size of the composition.
+
+```tsx
+<AbsoluteFill>
+  <Sequence width={COMPOSITION_WIDTH} height={COMPOSITION_HEIGHT}>
+    <CompositionComponent />
+  </Sequence>
+</AbsoluteFill>
+```