Extracts timed subtitles from local video/audio files using Whisper. Outputs SRT format with accurate timestamps. Handles complex filenames automatically. Use when user asks to "extract subtitles", "get subtitles", "transcribe video", "识别字幕", "提取字幕", or "获取字幕".
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Extract timed subtitles (SRT) from local video/audio files using OpenAI Whisper.
Scripts: All scripts are in
scripts/relative to this SKILL.md.
- [ ] Step 1: Environment check (Whisper + FFmpeg)
- [ ] Step 2: Input validation (file exists, has audio stream)
- [ ] Step 3: Detect language (auto or user-specified)
- [ ] Step 4: Run extraction script
- [ ] Step 5: Verify output and report
which whisper
which ffprobe
| Result | Action |
|---|---|
| whisper found | Continue |
| whisper missing | brew install openai-whisper (macOS) or pip install openai-whisper |
| ffprobe missing | brew install ffmpeg |
en or zh as common options--language flag values: en, zh, ja, ko, fr, de, es, etc.bun scripts/extract_subtitles.ts "<video_path>" [language] [model]
Parameters:
| Parameter | Default | Description |
|---|---|---|
| video_path | (required) | Input video/audio file |
| language | en | Language code |
| model | auto by duration | Whisper model |
Model auto-selection (by duration):
| Video duration | Model | Approx. speed (CPU) |
|---|---|---|
| < 2 min | medium | ~2-3 min |
| 2-30 min | turbo | ~1x duration |
| > 30 min | base | fastest |
The script automatically handles:
Known issues:
| Issue | Solution |
|---|---|
FP16 not supported on CPU warning | Normal on Mac CPU, auto falls back to FP32 |
| MPS NaN errors | Do NOT use --device mps, script uses CPU |
Script automatically reports:
Basic extraction:
User: 帮我提取这个视频的字幕
→ bun scripts/extract_subtitles.ts "video.mp4" en
With language specified:
User: Extract English subtitles from this video
→ bun scripts/extract_subtitles.ts "video.mp4" en
Chinese video:
User: 提取中文字幕
→ bun scripts/extract_subtitles.ts "video.mp4" zh
Long video with specific model:
User: 提取这个一小时视频的字幕
→ bun scripts/extract_subtitles.ts "video.mp4" en base
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Checks and fixes Chinese copywriting with autocorrect-backed workflows for text and single-file Markdown/TXT inputs. Use when user asks to normalize Chinese punctuation, spacing, or full-width/half-width usage. Also triggers for "校对", "检查排版", "中英文空格", "全角半角". Does not rewrite document structure, product claims, or UI messaging.
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Writes, rewrites, and reviews Chinese technical documentation, product copy, and UI microcopy using ruanyf/document-style-guide, STE-inspired Chinese methods for procedural passages, and separate product and UI extensions. Use for 中文技术写作, README, API documentation, 操作指南, 安装部署说明, 故障排查文档, 运维 Runbook, 工具描述, Agent 指令文案, 产品介绍, 功能说明, 界面文案, 按钮, 空状态, and 错误提示 when the task concerns meaning, structure, or wording. Delegates requested formatting checks to daftai-chinese-copywriting. Pure punctuation or spacing tasks belong to that skill; personal essays and author-voice articles do not belong here.
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Audits a Cloudflare application repository for code paths and configuration that may create usage-based billing exposure. Use when asked to inspect Cloudflare Worker, D1, Durable Objects, storage, queue, or compute usage for unexpected bills, billing risks, or cost drivers. Reports evidence and uncertainty. Runs offline by default; optionally correlates user-authorized, bounded evidence from existing official tools. Does not guarantee a spending cap.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
Optimizes natural-language image requests and rough prompts into ready-to-use GPT Image 2.5 prompts using the official prompting guide as a live reference. Use when users ask to improve image prompts, 优化生图提示词, 把想法变成提示词, or write prompts for GPT Image 2.5 Flare or Sunburst. Produces prompt text, not images, unless the user explicitly asks to generate.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
Converts transparent or solid-background single-color PNG files and SVG files containing one embedded or local PNG into verified path-only SVG output. Removes pure-color backgrounds automatically. Uses Potrace threshold and parameter scans with alpha error metrics to preserve detailed logos, stamps, engravings, and line art. Use when the user asks to convert images to SVG, vectorize PNG, convert bitmap to true SVG, remove embedded raster data from SVG, 图片转矢量, PNG 转 SVG, 真矢量, or 位图描摹.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.
Translate subtitle files (SRT/VTT) between languages. Auto-detect source language, batch translate with count validation, optional bilingual merge output. Use when user asks to "translate subtitles", "翻译字幕", "subtitle translation", or needs subtitles converted to another language.
한국어 요약은 준비 중입니다. 원문 설명을 표시하고 있습니다.