- From: Cyril Concolato <cyril.concolato@telecom-paristech.fr>
- Date: Tue, 21 Jun 2016 17:19:45 +0200
- To: public-inbandtracks@w3.org
Hi, The ISOBMFF introduced the 'kind' box (see ISO/IEC 14496-12:2015, available here http://standards.iso.org/ittf/PubliclyAvailableStandards/c068960_ISO_IEC_14496-12_2015.zip). This 'kind' box can be used to store the 'kind' of a track as defined by different standards. For instance, it could be used to store DASH Descriptors associated with a track or the HTML 5 'kind' values for audio/video/text tracks. In order to tell from a kind value, which standard is referred to, the "kind" box stores a pair: schemeUri / value (similar to DASH descriptors). This email is to propose that the HTML standard defines a schemeUri for its kind values. I'm sending this request to this list first, as I think this probably should be reviewed in the context of the sourcing spec first. I propose to define the following schemeURI "urn:w3c:html5:kind". I have made a set of mp4 files with the different values available here: http://download.tsi.telecom-paristech.fr/gpac/mp4box.js/mp4/html5-kind/. I have also made a test player that parses these mp4 files based on MP4Box.js and that creates MSE SourceBuffers, setting the Track Defaults with the values from the mp4 file. The demo is here: http://download.tsi.telecom-paristech.fr/gpac/mp4box.js/. Check the "HTML 5 Track Kind" examples. Unfortunately, it is not fully working in browsers as no current browser supports the Track Defaults feature, yet. I hear also that the feature itself is marked at risk in MSE, which would be a problem I think. Comments, questions are welcome. Regards, -- Cyril Concolato Multimedia Group / Telecom ParisTech http://concolato.wp.mines-telecom.fr/ @cconcolato
Received on Tuesday, 21 June 2016 15:20:19 UTC