RE: Tech Discussions on the Multitrack Media (issue-152)

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.

eric