How do I edit automatic Closed Captions (CC) for Kaltura media?

Edit Automatic Closed Captions (CC) for Kaltura Media

  1. Go to your Canvas course or log in to
  2. Click on My Media and select a media entry with captions.
  3. Select Edit from the Actions drop-down menu.
  4. Select the Captions tab and then click Edit Captions. This button is displayed only when configured by your admin.

    The Editor is displayed.

Editor Options

The following options are available:

Change Caption File 

 If there is more than one caption file for the entry, select a different caption file from the Captions drop-down menu.

Edit the Timestamp of Each Line

Click on the timestamp in the editor and modify the time. If there is overlapping time, the system highlights the overlapping time.


Enter a search term. The results are highlighted in each caption line.

Search and Replace Text

Enter the search term, enter the replacement term and click Replace.

Add Speaker ID 

Select rows and add the speaker ID in the Add Speaker to selected items.

The speaker ID is added in [] in the beginning of each line. In this example Ron was added as the speaker for the selected lines.

Auto Scroll Text 

Check Auto scroll to auto scroll the text when playing the media. 

When playing the player - the current line is highlighted in the captions file.

Find Frame for Text 

When clicking on a caption line the player jumps to the correct frame for the selected text.

Fast Forward Seek Backward

Add a Caption Line 

Hover over the caption line to display editing options.

  • Plus Sign
  • Trash icon - Click to remove the caption line

To add a caption line

  1. Click the Plus sign to add a new caption line. The line is duplicated and may be edited.
  2. Click the line you want to modify.  You can modify the original line or the copy.
  3. Change the caption text. When you modify text, a countdown appears to indicate the amount of characters you have left.
  4. Be certain to modify the time so that there is no overlap.

Revert Changes  

Reverts to the last saved changes


Saves the modified caption file.

The Revert & Save button is enabled only when modifying the captions file.

The Replace button is enabled only if the user modifies a value.

The transcript widget captions are replaced once the user chooses different captions.

Keyboard Shortcuts

  • Player seek 5S backwards = Ctrl <-
  • Player seek 2S backwards = <-
  • Player seek to 0 = Home and in Mac Command <-
  • Player pause-play toggle = space 
  • Player seek 5S forward = Ctrl ->
  • Player seek 2S forward = ->

Captioning Best Practices

  • Accurate: Captions must match the spoken words in the dialogue and convey background noises and other sounds to the fullest extent possible.
  • Synchronous: Captions must coincide with their corresponding spoken words and sounds to the greatest extent possible and must be displayed on the screen at a speed that can be read by viewers.
  • Complete: Captions must run from the beginning to the end of the video to the fullest extent possible.
  • Properly placed: Captions should not block other important visual content on the screen, overlap one another, or run off the edge of the video screen. 


Article ID: 48575
Thu 2/15/18 2:34 PM
Wed 4/7/21 11:40 AM