Individual skill

evo-video-tutorial-indexer

A comprehensive skill for extracting chapter indices from tutorial videos using FFmpeg audio extraction, OpenAI Whisper ASR transcription with word-level timestamps, and semantic chapter alignment via fuzzy string matching.

tasks-evolved/video-tutorial-indexer/environment/skills/evo-video-tutorial-indexer/SKILL.md

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Observed behavior: Local scripts
Last checked: Nov 6, 2026

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Repository stars (not skill ratings): 97
Repository last updated: Sep 10, 2026
License: Apache-2.0

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agent-skills Repository topic
ai-agents Repository topic
llm-agents Repository topic
open-world Repository topic
self-evolving-agents Repository topic
education Derived category

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SKILL.mdcore · 2,953 bytes
SKILL.mdcore · 2,953 bytes
scripts/chapter_detect.pyruns · 15,089 bytes
scripts/transcribe.pyruns · 6,207 bytes
scripts/utils.pyruns · 2,014 bytes

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# evo-video-tutorial-indexer

A comprehensive skill for extracting chapter indices from tutorial videos using
FFmpeg audio extraction, OpenAI Whisper ASR transcription with word-level timestamps,
and semantic chapter alignment via fuzzy string matching.

## Workflow

1. **Extract** audio from MP4 using FFmpeg (16kHz mono PCM WAV for optimal Whisper input)
2. **Transcribe** the audio using OpenAI Whisper with word-level timestamps enabled
3. **Analyze** transcript words using sliding window fuzzy matching to locate chapter boundaries
4. **Align** chapter titles to timestamps using multiple matching strategies and keyword heuristics
5. **Validate** structural requirements (monotonic timestamps, correct count, within duration)
6. **Output** JSON with video_info and chapters array