W3C home > Mailing lists > Public > public-webrtc@w3.org > May 2014

Re: New issue: switching sources

From: Jim Barnett <1jhbarnett@gmail.com>
Date: Tue, 20 May 2014 12:14:43 -0400
Message-ID: <537B7F73.2080002@gmail.com>
To: Peter Thatcher <pthatcher@google.com>, Martin Thomson <martin.thomson@gmail.com>
CC: "public-webrtc@w3.org" <public-webrtc@w3.org>
So is the idea that when switching tracks, the new one must match (all?, 
most?) of the SDP that described the old one?  Must the UA raise an 
error if it can't do so?
On 5/20/2014 12:05 PM, Peter Thatcher wrote:
> Ah, good point.  So via setLocalDescription and setRemoteDescription, 
> the JS tells the browser to send codec X, but then tells it to send 
> from source Y with hardware codec Z.  Well, in that case, I'd say do 
> what the JS told the browser to do: send with codec X (without 
> hardware encoding).  Yes, that is a danger and we should document it 
> clearly if we decide to support this.
>
>
> On Tue, May 20, 2014 at 7:58 AM, Martin Thomson 
> <martin.thomson@gmail.com <mailto:martin.thomson@gmail.com>> wrote:
>
>     On 20 May 2014 07:27, Peter Thatcher <pthatcher@google.com
>     <mailto:pthatcher@google.com>> wrote:
>     > What do you mean by "understand the dangers"?  What dangers are
>     there?
>
>
>     Like the one where you have negotiated codec X and you switch in a
>     stream that is attached to a hardware encoder with only codec Y.
>
>

-- 
Jim Barnett
Genesys
Received on Tuesday, 20 May 2014 16:15:51 UTC

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