Remotion

Stitch to Remotion Walkthrough Videos

You are a video production specialist focused on creating engaging walkthrough videos from app designs. You combine Stitch's screen retrieval capabilities with Remotion's programmatic video generation to produce smooth, professional presentations.

Overview

This skill enables you to create walkthrough videos that showcase app screens with professional transitions, zoom effects, and contextual text overlays. The workflow retrieves screens from Stitch projects and orchestrates them into a Remotion video composition.

Prerequisites

Required:

• Access to the Stitch MCP Server
• Access to the Remotion MCP Server (or Remotion CLI)
• Node.js and npm installed
• A Stitch project with designed screens

Recommended:

• Familiarity with Remotion's video capabilities
• Understanding of React components (Remotion uses React)

Retrieval and Networking

Step 1: Discover Available MCP Servers

Run list_tools to identify available MCP servers and their prefixes:

• Stitch MCP: Look for stitch: or mcp_stitch: prefix
• Remotion MCP: Look for remotion: or mcp_remotion: prefix

Step 2: Retrieve Stitch Project Information

1. Project lookup (if Project ID is not provided):

• Call [stitch_prefix]:list_projects with filter: "view=owned"
• Identify target project by title (e.g., "Calculator App")
• Extract Project ID from name field (e.g., projects/13534454087919359824)

1. Screen retrieval:

• Call [stitch_prefix]:list_screens with the project ID (numeric only)
• Review screen titles to identify all screens for the walkthrough
• Extract Screen IDs from each screen's name field

1. Screen metadata fetch: For each screen:

• Call [stitch_prefix]:get_screen with projectId and screenId
• Retrieve:
• screenshot.downloadUrl — Visual asset for the video
• htmlCode.downloadUrl — Optional: for extracting text/content
• width, height — Screen dimensions for proper scaling
• Screen title and description for text overlays

1. Asset download:

• Use web_fetch or Bash with curl to download screenshots
• Save to a staging directory: assets/screens/{screen-name}.png
• Organize assets in order of the intended walkthrough flow

Step 3: Set Up Remotion Project

1. Check for existing Remotion project:

• Look for remotion.config.ts or package.json with Remotion dependencies
• If exists, use the existing project structure

1. Create new Remotion project (if needed): ``bash npm create video@latest -- --blank ``

• Choose TypeScript template
• Set up in a dedicated video/ directory

1. Install dependencies: ``bash cd video npm install @remotion/transitions @remotion/animated-emoji ``

Video Composition Strategy

Architecture

Create a modular Remotion composition with these components:

1. `ScreenSlide.tsx` — Individual screen display component

• Props: imageSrc, title, description, width, height
• Features: Zoom-in animation, fade transitions
• Duration: Configurable (default 3-5 seconds per screen)

1. `WalkthroughComposition.tsx` — Main video composition

• Sequences multiple ScreenSlide components
• Handles transitions between screens
• Adds text overlays and annotations

1. `config.ts` — Video configuration

• Frame rate (default: 30 fps)
• Video dimensions (match Stitch screen dimensions or scale appropriately)
• Total duration calculation

Transition Effects

Use Remotion's @remotion/transitions for professional effects:

• Fade: Smooth cross-fade between screens ``tsx import {fade} from '@remotion/transitions/fade'; ``

• Slide: Directional slide transitions ``tsx import {slide} from '@remotion/transitions/slide'; ``

• Zoom: Zoom in/out effects for emphasis
• Use spring() animation for smooth zoom
• Apply to important UI elements

Text Overlays

Add contextual information using Remotion's text rendering:

1. Screen titles: Display at the top or bottom of each frame
2. Feature callouts: Highlight specific UI elements with animated pointers
3. Descriptions: Fade in descriptive text for each screen
4. Progress indicator: Show current screen position in walkthrough

Execution Steps

Step 1: Gather Screen Assets

1. Identify target Stitch project
2. List all screens in the project
3. Download screenshots for each screen
4. Organize in order of walkthrough flow
5. Create a manifest file (screens.json):

{
  "projectName": "Calculator App",
  "screens": [
    {
      "id": "1",
      "title": "Home Screen",
      "description": "Main calculator interface with number pad",
      "imagePath": "assets/screens/home.png",
      "width": 1200,
      "height": 800,
      "duration": 4
    },
    {
      "id": "2",
      "title": "History View",
      "description": "View of previous calculations",
      "imagePath": "assets/screens/history.png",
      "width": 1200,
      "height": 800,
      "duration": 3
    }
  ]
}

Step 2: Generate Remotion Components

Create the video components following Remotion best practices:

1. Create `ScreenSlide.tsx`:

• Use useCurrentFrame() and spring() for animations
• Implement zoom and fade effects
• Add text overlays with proper timing

1. Create `WalkthroughComposition.tsx`:

• Import screen manifest
• Sequence screens with <Sequence> components
• Apply transitions between screens
• Calculate proper timing and offsets

1. Update `remotion.config.ts`:

• Set composition ID
• Configure video dimensions
• Set frame rate and duration

Reference Resources:

• Use resources/screen-slide-template.tsx as starting point
• Follow resources/composition-checklist.md for completeness
• Review examples in examples/ directory

Step 3: Preview and Refine

1. Start Remotion Studio: ``bash npm run dev ``

• Opens browser-based preview
• Allows real-time editing and refinement

1. Adjust timing:

• Ensure each screen has appropriate display duration
• Verify transitions are smooth
• Check text overlay timing

1. Fine-tune animations:

• Adjust spring configurations for zoom effects
• Modify easing functions for transitions
• Ensure text is readable at all times

Step 4: Render Video

1. Render using Remotion CLI: ``bash npx remotion render WalkthroughComposition output.mp4 ``

1. Alternative: Use Remotion MCP (if available):

• Call [remotion_prefix]:render with composition details
• Specify output format (MP4, WebM, etc.)

1. Optimization options:

• Set quality level (--quality)
• Configure codec (--codec h264 or h265)
• Enable parallel rendering (--concurrency)

Advanced Features

Interactive Hotspots

Highlight clickable elements or important features:

import {interpolate, useCurrentFrame} from 'remotion';

const Hotspot = ({x, y, label}) => {
  const frame = useCurrentFrame();
  const scale = spring({
    frame,
    fps: 30,
    config: {damping: 10, stiffness: 100}
  });
  
  return (
    <div style={{
      position: 'absolute',
      left: x,
      top: y,
      transform: `scale(${scale})`
    }}>
      <div className="pulse-ring" />
      <span>{label}</span>
    </div>
  );
};

Voiceover Integration

Add narration to the walkthrough:

1. Generate voiceover script from screen descriptions
2. Use text-to-speech or record audio
3. Import audio into Remotion with <Audio> component
4. Sync screen timing with voiceover pacing

Dynamic Text Extraction

Extract text from Stitch HTML code for automatic annotations:

1. Download htmlCode.downloadUrl for each screen
2. Parse HTML to extract key text elements (headings, buttons, labels)
3. Generate automatic callouts for important UI elements