video-to-text-bcut

name	video-to-text-bcut
description	Transcribe video/audio URL to text + word-level timestamps using Bilibili Bcut ASR API (free, no API key). Preferred for Chinese content — Bcut gives character-level timestamps vs Whisper word-level. Returns text + segments [{start, end, text}]. Requires yt-dlp + ffmpeg.
version	0.1.0
layer	leaf
domains	["video-audio","transcription","chinese"]
scenarios	["video-to-text","bilibili-transcription","chinese-subtitle"]
trigger_keywords	["转文字","字幕","转录","bcut","必剪","bilibili transcribe","中文转录"]
model_tier	Fast
auth_required	false
cost	free

Uses Bilibili's public Bcut ASR API (no login required):

1. yt-dlp extracts audio from video URL
2. ffmpeg converts to 16kHz mono WAV
3. Bcut API: upload → create task → poll → get word-level timestamps
4. SegmentBuilder aggregates chars into sentence-level segments

Output

{
  "ok": true,
  "text": "完整转录文本",
  "segments": [{"start": 0.0, "end": 2.5, "text": "第一句话。"}],
  "duration_seconds": 120.5,
  "source": "https://..."
}

Quality Bar

• Returns segments with start/end in seconds
• Handles Bcut polling timeout gracefully (returns partial text)
• Falls back gracefully if Bcut fails