Optionalcea608CEA-608 grid position for closed captions.
The playback time in seconds when the subtitle should be hidden.
OptionalhtmlHTML cue text, which may include styling generated by the native SDK.
Treat as renderer input, not plain text.
OptionalimageData URI for image subtitle data.
OptionallayoutCue-box geometry.
Present only when at least one concrete layout field is available from native cue data.
This event name as it is on the native side.
OptionalregionNative cue region metadata.
Forwarded only when the native SDK provides it. Built-in iOS/tvOS WebVTT parsing does not currently populate this field.
The playback time in seconds when the subtitle should be rendered.
OptionaltextPlain-text content of this subtitle.
The UNIX timestamp in which this event happened.
Emitted when an active subtitle entry transitions into the inactive status.