OptionalaudioThe number of words each audio element should be counted as.
OptionaliframeThe number of words each iframe element should be counted as.
OptionalimageThe number of words each image element should be counted as.
OptionalvideoThe number of words each video element should be counted as.
Options used when creating EPUB ContentPositionTimeline objects with WORDS as unit of measurement.
In publications with lots of media, it might be desirable to count media elements (or other replaced elements) as X number of words to get a better estimation of the "length" of the rendered publication. By default each replaced element is counted as 10 words.