Accessible Caption Auditor
Audit and refine video captions for WCAG 2.1 AA compliance
What You Can Do
You can validate video captions and subtitles against WCAG 2.1 AA accessibility standards, ensuring proper speaker identification, sound descriptions, and timing synchronization. The skill analyzes caption quality, identifies compliance gaps, and provides specific recommendations to bring your video content up to legal and ethical accessibility standards. It works with multiple caption formats and video types to audit batches of content efficiently.
Features
Automatically checks captions against specific Web Content Accessibility Guidelines criteria including color contrast (if burned-in), positioning, and readability requirements
Verifies that all speakers are clearly labeled or identifiable, especially critical for interviews, panels, and multi-speaker content
Validates that important non-dialogue audio elements (music cues, sound effects, tone indicators) are properly described for deaf and hard-of-hearing viewers
Detects timing mismatches between captions and spoken dialogue, ensuring text appears and disappears at appropriate moments
Analyzes grammar, punctuation, formatting consistency, and reading level to ensure captions are easy to follow and professionally presented
Processes multiple video files and generates comprehensive compliance reports showing pass/fail status for each video and aggregated metrics
Provides actionable, specific suggestions for fixing each issue with examples of compliant alternatives
Accepts common caption formats (SRT, VTT, WebVTT, ASS/SSA) and works with both embedded and sidecar caption files
Example Output
Compliance Report: company-training-video.mp4
Overall Compliance: 78% (AA with minor issues)
Issues Found
-
Speaker Identification - FAILED
- Lines 12-14: "Good morning everyone" - speaker unknown
- Fix: Add speaker name before dialogue
-
Sound Descriptions - PASSED
- All background music, transitions, and alerts properly described
-
Timing Accuracy - WARNING
- Lines 45-47: Caption appears 0.5s after dialogue starts
- Impact: Low - minor delay acceptable
Summary
Your captions need speaker labels on 8 lines and one timing adjustment. With these fixes, video achieves full WCAG 2.1 AA compliance. Estimated remediation time: 15 minutes.
Next Steps
- Add speaker names to lines: 12, 14, 28, 35, 42, 51, 58, 62
- Re-run audit to verify
What's Included
- WCAG 2.1 AA Compliance Checklist: Complete list of 12 specific accessibility criteria your captions must meet, with scoring guidance
- Caption Quality Analysis Engine: Evaluates grammar, consistency, readability level, and formatting standards across all captions
- Speaker Identification Validator: Checks that all speakers are labeled or distinguishable, with detailed reports of missing identifications
- Timing Verification Tool: Analyzes caption timing against dialogue duration and identifies sync issues within 500ms tolerance
- Compliance Report Template: Professional, printable format suitable for stakeholders, QA teams, and legal documentation
- Remediation Action Items: Specific, prioritized list of fixes needed with examples of compliant alternatives you can copy-paste
Who It's For
- Accessibility Specialists
- Video Content Producers
- Digital Compliance Officers
- QA and Testing Professionals
- Corporate Learning/eLearning Designers
Best For
- Video caption validation and auditing
- WCAG 2.1 AA compliance verification
- Accessibility remediation planning
- Batch caption quality assurance
- Legal and regulatory compliance documentation
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