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Version: 7.8.0


The articles in this section describe how to implement common use-cases related to text tracks, subtitles, closed captions and metadata. These use-cases can range from programmatically detecting new metadata, to side-loading subtitles.

The textTrackRendering feature flag, included by default makes THEOplayer capable of supporting

  • subtitle and closed caption formats like WebVTT, CEA-608, DVB Subs and TTML;
  • metadata formats like ID3, emsg, EventStream and EXT-X-DATERANGE.

The textTrackRendering feature exposes the TextTracks API. This API allows developers to programmatically switch between text tracks, detect events related to text tracks (e.g. new active cue) and more.