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Auto-Captioning for Kaltura
Videos uploaded to Kaltura in Moodle and Canvas now have auto-captions.
The new auto-captioning feature uses the Cielo24 Automatic Speech Recognition (ASR) service. This means that now when a viewer clicks the "cc" icon in the Kaltura player window while in Moodle or Canvas, they will be able to see closed captioning on any video uploaded after February 1, 2018.
This feature is in place for any instructor, staff, or student that uploads to Kaltura, and there are no settings for them to change to enable the captioning process.
Only 80% Accurate
While ASR captions are a step forward, it is important to know that they only offer around 80% accuracy. That means:
- 1 in 5 words is incorrect
- A 8-word sentence will be ≅17% accurate
- A 10-word sentence will be ≅11% accurate
The WCAG 2.0 caption definition prescribes that the captions provide "information needed to understand the media content" and that "captions convey not only the content of spoken dialogue, but also equivalents for non-dialogue audio information".
Accurate Captions Help Ensure Inclusiveness
Accurate captioning is the only way to ensure that people who are Deaf and hard of hearing can understand audio content. In fact, most accessibility advocates would argue that automatic generated captions are actually detrimental to accessibility.
Using Auto-Captions as a Starting Point
However, auto-captions can be very useful as a starting point for providing captions. Learn how to Review and Edit Captions from Cielo24.
The Multimedia Hub is available to assist the UMD community in providing videos inclusive to all. The Hub is happy to work with you to make accessible videos.
As stated in UMD's Captioning of Video Policy, funding is available specifically for credit courses with an enrolled student who has a disability (documented with Disability Resources) which would be accommodated by captioning.
- Kaltura: Improve and Manage Automatic Captions
- Kaltura: Add a Co-Editor/Co-Publisher or Change Media Owner
- Kaltura: Review and Edit Captions from Cielo24
- Kaltura: Learn About Professional Captioning
- Kaltura: Upload Custom Captions
- Kaltura: Automatic Captions for Languages Other Than English
- Kaltura: Automatic Captions for Older Content
- Kaltura: Remove Automatic Captions
- Kaltura: View and Search Video Contents in Media Galleries
- Kaltura: Moderate and Manage Media Galleries
- Kaltura: Add Videos to Media Galleries
- Captioning of Video Policy - UMD
- Captions, Transcripts, and Audio Descriptions - WebAIM
- Web Content Accessibility Guideline (WCAG) 1.2.2 Captions (Prerecorded): Captions are provided for all prerecorded audio content in synchronized media, except when the media is a media alternative for text and is clearly labeled as such. (Level A)
- Understanding SC 1.2.2 - Understanding and Implementing WCAG
- F8: Failure of Success Criterion 1.2.2 due to captions omitting some dialogue or important sound effects - WCAG
- G87: Providing closed captions - WCAG
- Video captions improve comprehension, professor finds - Jonathan Morales
- Higher Ed Accessibility Lawsuits Complaints, and Settlements - Laura Carlson
- Media Accessibility User Requirements - W3C