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Chapter 4: Video and Audio > Synchronising media tracks

Synchronising media tracks

HTML5 will allow for alternative media tracks to be included and synchronised in a single <audio> or <video> element.

You might, for example, have several videos of a sporting event, each from different camera angles, and if the user moves to a different point in one video (or changes the playback rate for slow motion), she expects all the other videos to play in sync. Therefore, different media files need to be grouped together.

This could be a boon for accessibility, allowing for sign-language tracks, audio description tracks, dubbed audio tracks, and similar additional or alternative tracks to the main audio/video tracks.


MediaElement.js, King of the Polyfills

MediaElement.js (www.mediaelementjs.com) is a plugin developed by John Dyer (http://j.hn), a web developer for Dallas Theological Seminary.


  

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