Re: [MMUSIC] "a=extmap" with BUNDLE

Iñaki Baz Castillo <> Sun, 26 March 2017 01:36 UTC

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From: Iñaki Baz Castillo <>
Date: Sun, 26 Mar 2017 03:35:54 +0200
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To: Taylor Brandstetter <>
Cc: Suhas Nandakumar <>, mmusic WG <>
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Subject: Re: [MMUSIC] "a=extmap" with BUNDLE
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2017-03-24 19:28 GMT+01:00 Taylor Brandstetter <>:
> saw that. Which means that individual documents are responsible for defining
> how their extensions work with BUNDLE.
> But something still would need to define the general restrictions for using
> "extmap" with BUNDLE, such as the ID restriction. Or is that just something
> that's common sense and doesn't need to be specified? just mandates that the
IDs must be unique within a m= section, but at the end, all the WebRC
implementations use unique ID values across the entire SDP.

There are some RTP extensions, such as,
that work at *transport* level (rather than at m= section level), but
nothing prevents such a spec to work even if its ID is not unique
within the m= sections.

This is, IMHO we don't need a global behavior/requirement for the ID
values within bundled m= sections.

Iñaki Baz Castillo