fix: pass all scene data through mapInputProps to Remotion

[codercatdev]

Fix: Pass all scene data through mapInputProps to Remotion

Root Cause

mapInputProps() in remotion.ts was cherry-picking only 6 fields per scene:

// BEFORE — drops sceneType, code, list, comparison, mockup, wordTimestamps
scenes: input.script.scenes.map((s, i) => ({
  narration: s.narration,
  visualDescription: s.visualDescription,
  bRollKeywords: s.bRollKeywords,
  sceneNumber: s.sceneNumber,
  durationEstimate: s.durationEstimate,
  bRollUrl: input.bRollUrls[i],
})),

This caused every scene to fall through to the generic Scene component in SceneRouter, making all videos look like plain word overlays with B-roll — even though Gemini was generating rich scene data with comparison tables, code snippets, and mockups.

Fix

// AFTER — spreads all scene fields through to Remotion
scenes: input.script.scenes.map((s, i) => ({
  ...s,
  bRollUrl: input.bRollUrls[i],
})),

Also added missing fields to RenderInput type so TypeScript knows about them:

• sceneType — routes to CodeMorph, DynamicList, ComparisonGrid, IsometricMockup, Infographic
• code — snippet, language, highlightLines
• list — items, icon
• comparison — leftLabel, rightLabel, rows
• mockup — deviceType, screenContent
• wordTimestamps — per-word timing from ElevenLabs

Impact

All 6 scene types will now render correctly:

Scene Type	Before	After
narration	✅ worked	✅ works
code	❌ fell through to generic	✅ CodeMorphScene
list	❌ fell through to generic	✅ DynamicListScene
comparison	❌ fell through to generic	✅ ComparisonGridScene
mockup	❌ fell through to generic	✅ IsometricMockupScene
infographic	❌ fell through to generic	✅ InfographicScene

Scope

1 file: lib/services/remotion.ts — 7 insertions, 6 deletions.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
codingcat-dev	Ignored		Mar 13, 2026 2:37am