PowerPoint 2016 supports the playback of video with multiple audio tracks. It also supports closed captions and subtitles that are embedded in video files. Closed captions or subtitles must be encoded into the video before it is inserted into PowerPoint. PowerPoint does not support closed captions or subtitles that are stored in a separate file from the video file.
Supported video formats for captions and subtitles vary depending on the operating system that you’re using. Each operating system has settings you can use to adjust how the closed captions or subtitles are displayed.
Closed captions, subtitles, and alternate audio tracks are not preserved when you use the Compress Media or Optimize Media Compatibility features. Also, when saving your presentation as a video, closed captions, subtitles, or alternate audio tracks in the embedded videos are not included in the video that is saved.
When you use the Save Media as command on a selected video, closed captions, subtitles, and multiple audio tracks embedded in the video are preserved in the video file that is saved.
To make your PowerPoint presentations accessible, ensure the following:
- Videos include an audio track with video descriptions, if needed, for users that are blind or visually impaired.
- Videos that include dialogue also include closed captions or subtitles in a supported format for users that are deaf or hard of hearing.