Kaltura - Captioning a Video


This article describes how to caption a video in Kaltura.


Captions are for the most part automatically generated in Kaltura. This process is handled by Automatic Speech Recognition (ASR) technology and is about 80% accurate. The remaining errors can be corrected by hand. This process is not immediate, and captions will take some time to appear. If you rip the video from a DVD or download from another location, captions may already be available.

The overall process of creating a captioned video consists of:

  1. Uploading to Kaltura
  2. Activating captioning if necessary
  3. Correcting captions:

The captioning workflow outlines a variety of starting points for video and the steps to get those videos captioned.

Editing Captions:

The REACH caption editor can be found in your myMedia library by clicking the "Actions" tab under the video you wish to edit. Clicking through EDIT > Caption & Enrich > Edit Captions (Pencil icon) will bring you to the editor. Please see the Edit Captions link below for more on editing.

Downloading Captions File:

You may not want to edit directly in the Kaltura editor but download, fix and re-upload the caption file. Follow the instructions below to download the caption file. When it's time to re-upload, the "Upload captions file" button is found on the same page and the download icon. 

  1. Click on the captions Tab
  2. If there is a captions file it will be listed as an SRT file.
  3. Use the Download icon
  4. Select where you would like to save the file
  5. The file will be saved as a .txt file and can be opened with any Text editor such as Notepad or Word

Granite State College

Video captioning for Granite State College works differently for the time being. Follow the process outlined below to make the request.

Adding Caption Tag to New Video Uploads

When first uploading a video to Kaltura at GSC, you must add captionasr as a tag when you upload media, under the details section for your video. Find the details section and type in captionasr. Be sure to Click "Save" and the  "Save and Embed". Then be sure to go "Back to My Media"

Adding Caption Tag to New Existing Kaltura Videos

When visiting the Dashboard on Moodle click on "My Media" on the left-hand side of the Dashboard under the "Resources" menu. 

Resources tab in Moodle at GSC

Find the video you would like to add captions to. Click on the small pencil icon next to the video title.

Pencil Icon for videos in My Media

Lastly, type in captionasr under the tags item in the menu for the selected video. Then click save. Your captions will be generated, note again this may take some time to process.


For more information about editing these files please follow this link to a Kaltura tutorial:

Edit Captions

Related Articles:

Kaltura: An Overview

Need Additional Help?

Please contact the Service Desk as 603-862-4242
Please fill out the Lecture Capture web form with as much information as possible or contact the ET&S Help Desk team on your local campus.


Article ID: 1056
Fri 7/19/19 5:48 PM
Thu 1/14/21 2:07 PM
Applicable Institution(s):
Granite State College (GSC)
Keene State College (KSC)
Plymouth State University (PSU)
University of New Hampshire (UNH)
USNH System Office