An alternative for time-based media is provided for all prerecorded synchronized media and for all prerecorded video-only media.
Testing & RemediationHow to test: View any of the video content on your site and check to see if there is a text version of the content. How to remediate: When posting video content to your site, include an alternative, text based version of the content. The alternative for time-based media provides a running description of all that is going on in the synchronized media content. It reads something like a book. Unlike audio description, the description of the video portion is not constrained to just the pauses in the existing dialogue. Full descriptions are provided of all visual information, including visual context, actions and expressions of actors, and any other visual material. In addition, non-speech sounds (laughter, off-screen voices, etc.) are described, and transcripts of all dialogue are included. The sequence of descriptions and dialogue transcripts is the same as the sequence in the synchronized media itself.
Questions and Answers
Most of the time animated gifs will be accessible. There should be a few things to keep in mind though to ensure this remains true. For example, ask yourself if there is another way that the message can be communicated. Would a still image do? If not, think about providing an alternative or some way that users can forgo the animation. A useful tool when checking your gifs for accessibility may be this Photosensitive Epilepsy Analysis Tool. The thought behind this is that you can make sure the animation won't trigger seizures in people who are sensitive to them.
Time-based media is content that must be made accessible when held against criterion 1.2 of the WCAG 2.0 guidelines found here: https://www.w3.org/TR/UNDERSTANDING-WCAG20/media-equiv.html Content is considered time-based media if it's:
- A combination audio/video
- Audio and or video combined with an interaction.
This question depends on a number of factors including size of site, desired level of conformance, your developer's understanding of accessibility techniques, etc. Accessible Web is here to help. Reach out and we can discuss your site specifically.