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[mediacapture-main] Text on 'overconstrained' confusing about deviceId constraint

From: jan-ivar via GitHub <sysbot+gh@w3.org>
Date: Fri, 26 Jun 2015 04:48:09 +0000
To: public-media-capture-logs@w3.org
Message-ID: <issues.opened-91152343-1435294088-sysbot+gh@w3.org>
jan-ivar has just created a new issue for 
https://github.com/w3c/mediacapture-main:

== Text on 'overconstrained' confusing about deviceId constraint ==
The text on 
[overconstrained](http://w3c.github.io/mediacapture-main/getusermedia.html#event-mediastreamtrack-overconstrained)
 reads:

"This error event fires for each affected track (when multiple tracks 
share the same source) after the user agent has evaluated the current 
constraints against a given 
[deviceId](http://w3c.github.io/mediacapture-main/getusermedia.html#dfn-deviceid)
 and is not able to configure the source within the limitations 
established by the union of imposed constraints."

Here, 
[deviceId](http://w3c.github.io/mediacapture-main/getusermedia.html#dfn-deviceid)
 links to the deviceId constraint definition.

Do we mean "source"? AFAIK the deviceId constraint is not special when
 it comes to overconstraining.

Also, a "union of constraints" seems confusing to me, when constraints
 themselves operate by producing an intersection of available 
capabilities. I don't think we define anywhere what the union of 
multiple constraints is. Is there a different way to describe this?

See https://github.com/w3c/mediacapture-main/issues/203
Received on Friday, 26 June 2015 04:48:11 UTC

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