What a reader needs of a fetcher to keep a text track populated, and no more - so the readers stay clear of how any one media type resolves its cue times.
Takes the cues already on the track as read, so a restored session does not fetch them again.
Reads whatever the rendition has gained since the last pass.
What a reader needs of a fetcher to keep a text track populated, and no more - so the readers stay clear of how any one media type resolves its cue times.