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Request that 'zoom' constraint be added to spec for VideoStreamTrack (see http://dev.w3.org/2011/webrtc/editor/getusermedia.html#iana-registrations). Apologies if this bug already exists.
Closing as "wontfix" - the way we manipulate settings that a) are unique to the device and b) can't be simply turned on and off is a bigger subject that we shouldn't expect to tackle in the 1.0 version of the spec. There is some discussion of pan/tilt/zoom in the minutes from the Feb 5-7 interim meeting.