Kaltura - Editing Captions in a Video


This article describes how to edit captions in a Kaltura video .


Task: This article reviews all functionality for Captions in Kaltura, you will be able to work with captioning in Canvas, MediaSpace, and more. 


Captions are, for the most part, machine 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. Requesting captioning if necessary
  3. Correcting/editing captions:

The Understanding Captions and Captioning Workflow outlines a variety of starting points for video and the steps to get those videos captioned.

This article guides you through the captioning options noted below.  Click on any of the links to navigate to the section you would like to learn more about. 

Correcting/Editing Captions in Canvas

Editing Captions within Kaltura

Editing Captions in MediaSpace (media.unh.edu or mediaspace.plymouth.edu) 

Download Your Captions for Editing

Correcting/Editing Captions in Canvas:

1. First, go to your Canvas course and click on My Media

2. Find the video on which you'd like to edit captions and click on it

3  Select "ACTIONS"

4. Select  "Edit"

5. Select the "Captions" menu item below your video and your transcript. Select "Hide Transcript" if you're having trouble scrolling down to the lower menu.

Screenshot showing transcript

6. You now have the option to either edit the file within the Kaltura system or edit the file with a .srt download.

Editing Captions within Kaltura

  1. We'll begin with editing within the Kaltura system. Select "Edit Captions".       

           Screenshot with blue circle around "Edit Captions"

  1. This will bring up your transcript and captions. Make your changes keeping in mind that each section of your transcript requires time code to keep the captions associated with the video in the proper place. Click on the text you want to edit and make your changes. The text box will become editable once you click on it. You can also search within your captions, replace text, and add a speaker. These changes will be reflected in the transcript as well.           

                                                                          Screenshot showing "Closed Captions Editor"














  1. Once you have made your changes, be sure to scroll to the right and select "save" to save your changes. We also recommend saving as you work (every 5-10 minutes) to assure you don't lose any changes that you make.             

                                  Screenshot showing captions over video

Correcting/Editing Captions in MediaSpace:

  1. First go to My Media
  2. Click on the title of the video you would like to caption. 
  3. Click on the ACTIONS tab 
  4. Click on Caption & Enrich
  5. Click on the pencil icon next to the captions file you would like to edit. Screenshot with red circle around editing pencil

Download Your Captions for Editing
If you'd like to download the captions file follow steps 1 through 4 above.

  • Click the Download icon (see image below) to download SRT file

    Screenshot with blue circle around download button


  • SRT files can be opened and edited with TextEdit (Mac) or in Notepad (Windows)
  • Edited captions files can be uploaded back into Kaltura by clicking the Upload captions file button in the Captions tab

    Screenshot with blue circle around upload captions file
  • You'll want to select browse and upload your updated captions file, be sure to select the language as well. Then click "Save"

Upload a captions file pop-up shown

  • You may see more than one captions file now available, you'll want to first delete the old file by selecting the "X" icon.

Screenshot of languages with blue circle around "X" icon

  • To activate the new file you'll want to select the "checkmark" icon. Now you've successfully manually updated your captions!


User will be able to add captions to their video.

Further reading:

Edit Captions

Kaltura: An Overview

Need additional help?

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



Article ID: 1056
Fri 7/19/19 5:48 PM
Tue 2/13/24 11:51 AM
Applicable Institution(s):
Keene State College (KSC)
Plymouth State University (PSU)
University of New Hampshire (UNH)