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Re: 'remoteTrackId' added to transceiver

From: Cullen Jennings (fluffy) <fluffy@cisco.com>
Date: Fri, 1 Sep 2017 14:07:32 +0000
To: Stefan HÃ¥kansson <stefan.lk.hakansson@ericsson.com>
CC: WebRTC WG <public-webrtc@w3.org>
Message-ID: <28D7D274-01B2-464F-A6EE-A90E4EE5CD4C@cisco.com>
I do not understan what this is or how it relates to the MSID information in the SDP.  I doubt I will have any objection to adding this, it just seems to need some more information about what it is. Does JSEP need to say more about this ? 


> On Sep 1, 2017, at 3:27 AM, Stefan HÃ¥kansson LK <stefan.lk.hakansson@ericsson.com> wrote:
> 
> Hi all,
> 
> yesterday we merged a PR [1] that introduced a 'remoteTrackId' readonly 
> attribute on the RTCRtpTransceiver. This property is intended to reflect 
> the id signaled in the (latest) SDP exchange for the received track (if 
> any) on the RTCRtpTransceiver. As you know the application can nowadays 
> create an RTCRtpTransceiver, which in turn has an RTCRtpReceiver with a 
> track, before any SDP exchanges. That track has an 'Id', which does (of 
> course) not reflect what is eventually signaled in the SDP, and since 
> the Id of a track is immutable it can't be updated once SDPs are exchanged.
> 
> The 'remoteTrackId' can be viewed in context at [2].
> 
> While we think this addition make a lot of sense we realize that we may 
> have acted a bit quickly here. Please let us know if you think more 
> discussion is needed.
> 
> Stefan
> 
> [1] https://github.com/w3c/webrtc-pc/pull/1567

> [2] 
> https://rawgit.com/w3c/webrtc-pc/master/webrtc.html#rtcrtptransceiver-interface

> 

Received on Friday, 1 September 2017 14:08:00 UTC

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