Bilibili AI Video Prompt Analyzer

Extract/reverse-engineer production-ready prompts from Bilibili AI-generated videos for imitation. Outputs detailed prompts in ComfyUI/Seedance format that can be used directly with minimal edits.

Workflow

1. Download video: Get video from Bilibili URL using yt-dlp
2. Extract subtitles: Extract soft or hard subtitles for voiceover reference/rewrite
3. Extract frames: Extract frames at configurable FPS (default: 1 frame/second)
4. Visual analysis: Analyze frame-by-frame to identify style, subjects, colors, composition, motion changes
5. Structure output (ready for direct use):
   • Technical metadata (aspect ratio, duration, fps, model recommendation)
   • 2-3 keyframe prompts (most distinct compositions, ComfyUI comma format)
   • Scene sequence by story beat (timeline + prompt evolution)
   • Full video master prompt (overall style + theme)
   • Extracted subtitle text (for voiceover reference)

When to Use