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Re: Status of SDP with more than 2 "m" lines

From: Eric Rescorla <ekr@rtfm.com>
Date: Mon, 15 Sep 2014 13:07:07 -0700
Message-ID: <CABcZeBNzx=5kwL_JieSgnU=fWCw+Ev3D-dJikRSnDvxrC-wTBQ@mail.gmail.com>
To: Iñaki Baz Castillo <ibc@aliax.net>
Cc: "public-webrtc@w3.org" <public-webrtc@w3.org>
On Mon, Sep 15, 2014 at 3:22 AM, Iñaki Baz Castillo <ibc@aliax.net> wrote:

> Hi,
>
> I'm afraid that, at least in my experiments, no browser supports a
> remote SDP offer with more than 2 "m" lines, with or without Bundle,
> with a single MediaStream or two.
>
> In case of Chrome (Canary) the createAnswer() call fails. I've reported it:
>
>
> https://code.google.com/p/chromium/issues/detail?can=2&start=0&num=100&q=&colspec=ID%20Pri%20M%20Iteration%20ReleaseBlock%20Cr%20Status%20Owner%20Summary%20OS%20Modified&groupby=&sort=&id=414202
>
> In the case of Firefox (Nightly) I won't spend time reporting it given
> that, after calling setRemoteDescription() with a 4 "m" lines SDP
> offer, a call to createAnswer() produces a SDP answer with 2 "m"
> lines, so I expect that nothing but a 2 "m" lines SDP is expected and
> supported.
>
>
> So, what is the *real* status of the (how to say...) multiple tracks
> (I mean more than a single MediaStream with audio+video)?
>

Firefox doesn't currently support > 1 stream each of Audio or Video, but
it's
on our timeline and we intend to do so eventually. The support will use
Unified Plan.

-Ekr
Received on Monday, 15 September 2014 20:08:19 UTC

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