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B-Roll Montage - Beat-Synced Reels with Remotion

Create finished beat-synced Instagram Reels using b-roll footage, Python BPM detection, and Remotion for rendering. Auto-generates uppercase text overlays per beat.

B-Roll Montage Skill

Create a finished beat-synced Instagram Reel from b-roll clips using music beat detection and auto-generated text overlays. Rendered with Remotion (React-based video).

Requirements

  • Python with librosa (or similar) for beat detection
  • Remotion reel-editor project set up locally
  • Your b-roll clips in 9:16 (portrait) format
  • Music track in mp3

Output

A finished 9:16 Reel (output/final.mp4) where each detected beat syncs with a clip cut and a new text overlay.

9-step process (overview)

  1. Gather topic + music choice
  2. Detect beats with Python (outputs BPM + beat timestamp array)
  3. Generate N text lines (one per beat, max 6 words, UPPERCASE)
  4. Choose b-roll clips + assign start offsets
  5. Set up a Remotion workspace
  6. Write broll-config.json
  7. Install deps + render
  8. Archive to your reels folder
  9. Report metrics + suggest scheduling

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