media-accessibility
Media Accessibility Skill
Reference data for video, audio, and streaming media accessibility. Used by media-accessibility agent and any web agent encountering <video> or <audio> elements.
WCAG 1.2 Time-Based Media Criteria
| SC | Level | Requirement | Test |
|---|---|---|---|
| 1.2.1 | A | Audio-only/video-only: provide text transcript or audio track | Transcript exists alongside media |
| 1.2.2 | A | Captions for prerecorded audio in video | Synchronized captions present |
| 1.2.3 | A | Audio description OR text alternative for prerecorded video | Description track or full transcript |
| 1.2.4 | AA | Captions for live audio in video | Real-time captioning active |
| 1.2.5 | AA | Audio description for prerecorded video | Description track present |
| 1.2.6 | AAA | Sign language for prerecorded audio | Sign language interpretation video |
| 1.2.7 | AAA | Extended audio description | Paused video for long descriptions |
| 1.2.8 | AAA | Media alternative for prerecorded video | Full text alternative document |
| 1.2.9 | AAA | Audio-only (live): text alternative | Real-time text transcript |
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