Re: Multimedia Metadata

You can determine the type of video track with the "kind" attribute:

http://www.w3.org/html/wg/drafts/html/CR/embedded-content-0.html#dom-videotrack-kind


It sounds like you might want to propose some additional ones?

For Matroska/WebM getting the kind is kind of complicated right now. For WebVTT, you can get it from the codec ("D_WEBVTT/kind"), but I don't think there's any way to have a kind for other types of content right now. If you can convince the WebM maintainers to add one it would be nice though.

On Wed, 2014-02-19 at 23:16 +0000, Adam Sobieski wrote:
Media Resource In-band Tracks Community Group,


Greetings.  Which group(s) is exploring metadata standards and API for multimedia metadata such as XMP, MPEG7 and Matroska metadata?


A scenario is that of presentations and classroom lectures where videos might have three video tracks: (1) video of presenter, (2) video of a presentation surface, (3) video with cinematography between presenter and presentation surface.  HTML5 supports synchronizing multiple media elements, such as video tracks (1) and (2) (http://www.w3.org/TR/html5/embedded-content-0.html#synchronising-multiple-media-elements).  A fourth track, however, could be (4) side-by-side of tracks (1) and (2).  Some of the combinations of presenters and presentation surfaces, as aforementioned, are referred to as enhanced video.



Presentation scenarios are numerous, including digital education, and multimedia metadata can facilitate new web-based scenarios and features.  Describing multimedia tracks with metadata enhances the portability of the multimedia files, e.g. features from XMP, MPEG and Matroska.  Web browsers and multimedia software could provide enhanced viewing experiences and features based upon multimedia metadata.


Extensible semantic metadata ontology, vocabularies, and JavaScript API could facilitate the portability of multi-track, featureful, multimedia objects.






Kind regards,


Adam Sobieski