On 2014-04-23, at 04:39, Marco Chen <[email protected]> wrote:

> 2. Then there are multiple MediaStreamTrack to represent multiple audio/video 
> tracks in TV stream. 

I don’t know if this is a problem here, or whether it’s just a 
misunderstanding, but the structure of MediaStream is actually three-deep:

MediaStream is a synchronisation container
MediaStreamTrack describes a single type of related content (e.g., audio, or 
video)
channels are not visible in the DOM, but they correspond to a single piece of a 
track (e.g., the left speaker channel in multi-channel audio)

When you say that there are multiple MediaStreamTrack instances, do you mean to 
say that there is media from multiple sources (e.g., separate cameras, 
different translations), or are you talking about media with multiple parts 
(e.g., 5.1 channel audio)?

Why is it necessary for MediaStreamTrack to carry tags that identify things as 
(for example) English or Mandarin?  Is it not possible for this labelling to 
occur in the application?
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