Audio, Video, Animations, and Motion Flashcards
What are the four main methods of making audio and video accessible?
- Captions
- Transcripts
- Audio descriptions (of visual content)
- Sign language interpretations
When are captions needed?
- Prerecorded multimedia
- All live media (video plus audio)
- All live audio only that contains dialog or narration
When should use use transcripts?
- Provided for all multimedia (video plus audio content)
- Pre-recorded audio only
- Should provide cues for any visual aspects if video only.
Captions should not be more than…
3 lines on the screen,
not exceed 32 characters
How long should captions stay on the screen?
minimum of 1 second, 0.3 seconds per word
What font size for captions?
22 pt
How long should gaps in captions be?
minimum of 1.5 seconds
What is caption file format?
WebVVT
When should Sign Language be considered?
- Pre-recorded multimedia
- Audio only content
- live multimedia
- Live audio content
What is the threshold for flashing screen content?
no more than 3 times per second
What is a parallax effect?
Background scrolls at a different rate from the foreground.
Auto play content requires what controls?
Pause, stop, hide if it lasts 5 seconds or more.
What updates the user when the page is loaded or reloaded?
tag
What aria tag announces when dynamic content is on the page?
ARIA live region
Session time outs need to…
Warn the user before the session ends
Save incomplete data
