Feature: Auto-detect video chapters from metadata/transcription (#493)#494
Merged
filthyrake merged 2 commits intodevfrom Jan 3, 2026
Merged
Feature: Auto-detect video chapters from metadata/transcription (#493)#494filthyrake merged 2 commits intodevfrom
filthyrake merged 2 commits intodevfrom
Conversation
Add ability to automatically detect and generate chapter markers from
video metadata or transcription analysis.
## New Features
### API Endpoint
- POST /admin/videos/{video_id}/chapters/auto-detect
- source: 'metadata', 'transcription', or 'both'
- min_chapter_length: minimum seconds between chapters (10-600)
- replace_existing: whether to clear existing chapters
### Metadata Chapter Extraction
- Extract chapter markers embedded in video files via ffprobe
- Supports Matroska (MKV), MP4/MOV, and other container formats
- Graceful fallback when no chapters found
### Transcription-Based Generation
- Generate chapters from completed transcription text
- Sentence-based analysis for topic segmentation
- Configurable minimum chapter length
- Removes filler words from generated titles
## Implementation
- New module: api/chapter_detection.py with utility functions
- New schemas: ChapterDetectionSource, AutoDetectChaptersRequest,
AutoDetectChaptersResponse, DetectedChapter
- Comprehensive test coverage for all detection methods
Closes #493
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Security & reliability improvements: - Add HTML entity escaping for metadata-extracted titles (XSS prevention) - Add transaction retry logic with execute_with_retry() - Add SELECT FOR UPDATE for concurrency protection - Add endpoint-level 60s timeout for detection phase - Add timeout on process.wait() after kill signal Performance improvements: - Convert N+1 inserts to single batch INSERT RETURNING query - Pre-compile regex patterns at module level - Add named constants for magic numbers Code quality fixes: - Replace print() with logger.error() for proper logging - Remove unused video_slug parameter from function signature - Rename internal dataclass to avoid collision with Pydantic schema - Update tests for renamed class and removed parameter 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
Changes
POST /admin/videos/{video_id}/chapters/auto-detectapi/chapter_detection.pywith ffprobe and transcription utilitiesChapterDetectionSource,AutoDetectChaptersRequest,AutoDetectChaptersResponseFeatures
1. Import from Video Metadata
ffprobe -show_chapters2. Generate from Transcription
API Usage
Test plan
Closes #493
🤖 Generated with Claude Code