So for metadata types (content advisories, scte-35 insertion messages, etc) we would define specific types? This seems like it would work well - the user agent can be generic across all locales where there may be a difference in how metadata is encoded. Bob -----Original Message----- From: Eric Carlson [mailto:eric.carlson@apple.com] Sent: Thursday, March 03, 2011 4:21 PM To: Mark Watson Cc: Bob Lund; Silvia Pfeiffer; Philip Jägenstedt; public-html@w3.org Subject: Re: Tech Discussions on the Multitrack Media (issue-152) On Mar 3, 2011, at 3:13 PM, Mark Watson wrote: > In all cases we need both a label and an identifier. A label tells you some information about the track, but does not identify it: two tracks might have the same label. An identifier uniquely identifies the track but doesn't necessarily tell you anything about it. > > As Eric says ISO/QT files have IDs and type: I'm not sure if the types in ISO files go further than audio/video/text etc. though. > Type identifies the format of the media samples in the track, eg. MPEG-4 video, AAC audio, MP3, etc. ericReceived on Thursday, 3 March 2011 23:32:04 UTC
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