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The following page reviews video captioning resources reviewed by the Information Technology Services (ITS) accessibility team.


Table of Contents


About Captioning



About Cart Services (Live Captioning)



About Audio Description

  • Audio description (sometimes referred to as Described Video) is provided by a trained describer that provides descriptions of the visual components of the video. Audio description makes video accessible to blind/visually-impaired persons who would otherwise miss out on information presented visually. This information is synchronized with the video, but provided in a separate sound track.
  • For a full description and example of audio description, see the Penn State whitepaper titled An Introduction to Audio Description in Higher Education Video Content



Captioning of Recorded Videos from Popular Platforms

Many of our campus video and web conferencing platforms have some level of support for automatic captioning, but in most cases we recommend using Kaltura as your primary video storage and captioning tool. Please remember that while machine-generated captions can be a time-saver, they are error-prone and always require editing/clean-up.

  • Blackboard Collaborate Recordings
    • Blackboard Collaborate does not have automatic captioning functionality, so you must have a caption file created outside of Collaborate.
    • If professional captions are desired they can be obtained from a captioning vendor such as AST/CaptionSync in VTT or SRT format and uploaded to Collaborate.
    • Recommend downloading Collaborate recordings to Kaltura for captioning/storage.
  • Google Meet Recordings
    • Google Meet does not have automatic captioning functionality.
    • Recommend downloading Meet recordings and importing to Kaltura for captioning/storage
  • Kaltura MediaSpace Captioning
    • Videos created or uploaded to Kaltura will have automatic captioning applied which should then be cleaned up using Kaltura’s captioning editor.
    • If professional captions are desired they can be obtained from a captioning vendor such as AST/CaptionSync in SRT format and uploaded to Kaltura.
    • Zoom cloud recordings are automatically archived in Kaltura along with the automatically generated Zoom captions AND Kaltura automatically generated captions. User can choose which caption file to display on the Kaltura player and can edit/clean up the caption files in the Kaltura caption editor.
  • Microsoft Teams Recordings
    • Recordings are saved to Microsoft Stream where automatic captioning is applied and can be cleaned up using the Stream caption editor, or import the video to Kaltura for automatic captioning and cleanup using the Kaltura caption editor.
    • If professional captions are desired recommend requesting SRT format and importing to Kaltura.
  • Zoom Recordings
    • Zoom applies automatic captioning to meeting recordings
    • Zoom editor can be used to clean-up/edit captions for viewing in Zoom. (Note: Zoom caption file results in captions that contain too much text per line and too many lines per timestamp, which can’t be changed easily.)
    • Zoom cloud recordings are automatically archived in Kaltura along with the automatically generated Zoom captions AND Kaltura automatically generated captions. User can choose which caption file to display on the Kaltura player and can edit/clean up the Kaltura-generated caption files in the Kaltura caption editor.



Live Captioning of Events on Popular Platforms

Note: When determining how best to provide live captions for your event please consult Guidelines for CART and ASL Interpreting

  • Blackboard Collaborate
    • Moderator assigns captioner role to attendee, usually a professional captioner.
    • Note: Live captions will be available as closed captions on the recorded video in Blackboard, but live captions rarely meet the standard of quality required for recorded video so captioning of recording will still be required.
  • Google Meet
    • Automatic live captions are available during the session.
    • Note: Live captions are not available for download or for use in closed captioning of recording.
  • Microsoft Teams
    • Microsoft Teams does not support a live, professional captioner and the quality of the automatic captions is not sufficient.
    • Note: Live captions are not available for download after the meeting.
  • Zoom
    • Moderator assigns captioner role to attendee, usually a professional captioner
    • Live captions are retained in the recorded version as closed captions in Zoom, and automatically generated captions of recording are available as ‘Audio transcript’ in Zoom.
    • Transcript of live captions should be requested if desired as they will not be exported to Kaltura. Note: Zoom and Kaltura will autocaption the recording as described previously.



Captioning Vendors



Do-It-Yourself 

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