Re: [rtcweb] Proposal for a JS API for NoPlan (adding multiple sources without encoding them in SDP)

Peter Thatcher <pthatcher@google.com> Mon, 17 June 2013 18:00 UTC

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From: Peter Thatcher <pthatcher@google.com>
Date: Mon, 17 Jun 2013 10:59:41 -0700
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To: =?UTF-8?Q?I=C3=B1aki_Baz_Castillo?= <ibc@aliax.net>
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Cc: "<rtcweb@ietf.org>" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Proposal for a JS API for NoPlan (adding multiple sources without encoding them in SDP)
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In that use case, just call createLocalStream again with the new
MediaStream from GetUserMedia and get a new LocalMediaStream.  There's no
need to alter the existing one.


On Mon, Jun 17, 2013 at 9:34 AM, Iñaki Baz Castillo <ibc@aliax.net>; wrote:

> 2013/6/17 Peter Thatcher <pthatcher@google.com>;:
> > But I don't really see a use case where you would need to add tracks to a
> > MediaStreamTrackDescription, other than when parsing signalling and
> building
> > the MediaStreamTrackDescription to send down into createRemoteStream.
> > Perhaps if we had a use case, we could define such support.  But
> otherwise,
> > I'd say it's not allowed.
>
> Use case:
>
> - Start a session/call with just audio (no video requested to the user
> via getUserMedia).
> - Latter the user wants to add video.
> - For that a new getUserMedia(video: true) is requested.
> - Extract the video track from the obtained MediaStream and add it to the
> PC.
>
> Hope this is an enough common use case.
>
>
> --
> Iñaki Baz Castillo
> <ibc@aliax.net>;
>