Selecting Good Video and Audio Files
Use good judgement when selecting video and audio files.
- Do not choose grainy or consistently out-of-focus videos.
- Check videos to ensure there are no rapidly flickering images as these can cause seizures.
- Check the contrast in your video images. If you viewed the video in black and white would you be able to determine what the images are?
- Audio needs to clear and remain at a consistent volume throughout the track.
The images below are examples of imagery to avoid in your video choices:
Meeting 508 Standards
Standards
- Pages shall be designed to avoid causing the screen to flicker with a frequency greater than 2 Hz and lower than 55 Hz
- Web pages shall be designed so that all information conveyed with color is also available without color, for example from context or markup.
How to Meet the Standard
- No element on the page flashes at a rate of 2 to 55 cycles per second, thus reducing the risk of optically-induced seizures.
- Color is not used solely to convey important information, and Sufficient contrast is provided.
Who does this help?
Choosing quality video and audio helps everyone!
Sources:
WebAIM.org Section 508 Checklist
