Supported Closed Captions
Before uploading closed caption files to Backlot, verify that you are using a supported language and file format.
Supported Closed Caption File FormatsYou can upload closed caption files that use any of the following file formats.
Important: To ingest or upload a closed caption file, be sure to use the appropriate option (Ooyala Ingestion Service, Backlot UI, or Backlot API) that supports (✔) the format that you want to load into your Backlot account.
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||OIS||Backlot UI||Backlot API|
|.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.||✔||✔|
|.SRT||WebSRT (Web Subtitle Resource Tracks) file.||✔|
|.VTT||WebVTT (Web Video Text Tracks) file.||✔||✔|
Supported Closed Caption LanguagesYou can upload closed caption files that use any of the following languages.
Note: The language codes used for closed caption files should be in the ISO 639-1 format.