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ConstrainablePattern on remote streams?

From: Rob Manson <roBman@buildAR.com>
Date: Sat, 01 Nov 2014 10:38:18 +1100
Message-ID: <54541D6A.4090908@buildAR.com>
To: "public-media-capture@w3.org" <public-media-capture@w3.org>

in "5. The model: sources, sinks, constraints, and settings "[1] there 
is a brief statement about remote stream and constraints.

   "...though in this specification sources with the remote||||attribute
    set to true do not consider the current constraints applied to a 

My question is, do the ConstrainablePattern components (e.g. Settings, 
etc.) get transferred through an RTCPeerConnection so that on the client 
the remote MST has access to them?

My first thought is that this has to be no, otherwise there would be 
obvious fingerprinting and privacy issues. Obviously some values are 
available by default because they are just meta data about the structure 
of the stream and could be accessed through the HTMLVideoElement (e.g. 

If the answer is no, then I think we should be much more explicit in the 
comment I reference above. And I'm not sure from reading the spec 
how/where it would make it clear that MediaStreamTracks with remote == 
true should not support getCapabilities/getConstraints/getSettings/...

If I've missed where this is defined (perhaps relative to another 
spec/draft) then please point me in the right direction.



Received on Friday, 31 October 2014 23:31:50 UTC

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