The first thing you should do is enter Elemental Live . Once you access you must edit the job and add an embedded Caption Selector in the input :

To send for each quality

In the streams section of the job (configuration of each quality), you must add the sending of the Closed Caption that we received from the previous step, for each configured quality:

You must go to Settings and choose the player to which it is being configured. Once you log in, choose the Behavior option and click on Show Closed Caption Button, so that this option remains ON

Once selected, click Save Changes to save the changes. In this way, the "cc" option will appear on the player , which can be used by users.
It should be noted that this option is effective as long as the streaming content contains Closed Caption.

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Atte. The Mediastream Team