Read this: BBC - Research and Development: Implementing startOffsetTime for HTML5
Summary: Current implementations of HTML5 media elements on browsers like Firefox and Chrome expose the media timer via the timeupdate event so you can attach an event handler and use that to synchronise external timed metadata. The origin of this timeline, in all existing implementations, is time zero. This is fine for discrete fixed size or on-demand media as such media have a definite origin and duration, i.e. they start at zero time and all subsequent times are relative to that start time. - bbc.co.uk
www.bbc.co.ukBBC - Research and Development: Implemen…Transcriptions done by Google Cloud Platform.
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