WCAG 1.2.1: Audio-only and Video-only (Prerecorded)

How to

• Provide a text alternative for audio content

  Every audio file on a website requires a text alternative that conveys the content of the audio.

  This text is often a transcript of what is spoken. If there are multiple speakers, the transcript must also include the speakers’ names.

  Any sounds that are important for understanding must also be included in the transcript.

  Technique(s):

  • G158:Providing an alternative for time-based media for audio-only content
  

• Provide an alternative for silent video content

  Silent videos can have an alternative in two ways:

  1. Text-based video description: One option is to provide a text (in the language of the website) that describes the content of the video as thoroughly as possible. This includes describing the setting, actions, expressions, and more.

  2. Audio-based video description: The second option is to provide the description as an audio file. This can be an optional audio track or an audio file placed near the video. The audio should be provided in a common format such as MP3.

  Technique(s):

  • G159:Providing an alternative for time-based media for video-only content
  • G166:Providing audio that describes the important video content and describing it as such