CmafTtmlOutputSettings interface
Settings for a CMAF TTML Output.
TTML subtitles (ISO/IEC 14496-30, stpp) are carried as fragmented-MP4 segments for both HLS and DASH (unlike WebVTT, which uses raw .vtt for HLS). see NorskOutput.cmafTtml()
Signature:
export interface CmafTtmlOutputSettings extends SinkNodeSettings<CmafTtmlOutputNode>Extends: SinkNodeSettings<CmafTtmlOutputNode>
Properties
| Property | Type | Description |
|---|---|---|
number |
(Optional) How far behind live the subtitle "forcing timer" keeps its finalisation watermark when no cues are flowing, so that cues arriving late relative to their media timestamp (e.g. a transcriber holding a caption until an utterance ends) are not stranded in an already-finalised segment. Raise this if captioning for a stream is very stop-start / delayed. Default: one segment. |
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A list of destinations CmafDestinationSettings for this stream to be published to |
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(Optional) How to handle discontinuities in the media playlist |
||
number |
(Optional) Maximum elapsed duration since last playlist push before initiating a new push (ms) |
|
(Optional) Optional MQA quality-metric aggregation weights. When omitted, server defaults are used. |
||
string |
(Optional) The name to use for the playlist in a multivariant playlist |
|
boolean |
(Optional) Whether to insert a program date-time directive on every segment |
|
(Optional) What source to use for the program-date-time |
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(Optional) Playlist format(s) to generate |
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string |
(Optional) When generating LL-HLS playlists, include rendition reports for all streams sharing this renditionGroupId |
|
number |
The target segment duration in seconds |