Uploading a Closed Caption File in Backlot

After preparing a closed caption file, you can upload it to Backlot.

You can upload closed caption files that use any of the following file formats.
Note: The Backlot UI supports uploading all three formats. The Backlot API supports uploading only TTML (formerly DXFP) closed captions files.
Note: Playback on Ooyala mobile apps (apps developed using the Ooyala iOS and Android SDKs) requires the TTML (formerly DFXP) format. Player V4 Web supports additional closed-caption formats across all browser environments, including browsers on iOS and Android devices.
Extension Description
.TTML (formerly DXFP) TTML (Timed Text Markup Language file. Generally, a closed caption file will have a .dfxp (Distribution Format Exchange Profile) extension. For details, see Supported Closed Caption DFXP (now TTML) Format.
.SCC SCC (Scenarist Closed Caption) file. Supported only in the Backlot UI (not in the Backlot API).
.VTT WebVTT (Web Video Text Tracks) file. Supported only in the Backlot UI (not in the Backlot API).
Note: It is assumed that the video has already been uploaded via Backlot or the Ooyala Ingestion Services. See Ingesting Closed Caption Files for details.

To upload a closed caption file:

  1. Log in to the Backlot UI and open the MANAGE page.
  2. Do one of the following to access the video: Expand the STATUS menu on the left panel and click the Recently Created option, or expand the CONTENT TYPES menu on the left panel and click the Video option.
  3. From the list of uploaded videos, select the video to which you want to add closed captions.
  4. Click the Details tab, if it is not already selected.
  5. In the Closed Captions section, click Upload. You are prompted to upload a DFXP (now TTML) file.
  6. Select the closed caption file you want to associated with the video, and then click Open. Backlot UI uploads the file and adds it to the selected video.
  7. If you need to modify the file, delete it and upload a new file.
After the upload is complete, you will see an entry beneath the Closed Captions section title.