[Bug 22251] New: Define better error when no video or audio source is available


            Bug ID: 22251
           Summary: Define better error when no video or audio source is
    Classification: Unclassified
           Product: WebRTC Working Group
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Media Capture and Streams
          Assignee: public-media-capture@w3.org
          Reporter: dom@w3.org
                CC: public-media-capture@w3.org

If the device has no way to stream live video, the current algorithm sets
finalSet to an empty set, asks the user agent to prompt the user on that set.

Thus it's not clear whether:
* the UA should prompt at all (I guess it could offer to stream a video file in
that case)
* whether it ends with "permission denied", or a stalled algorithm

It would seem maybe more logical to trigger a ContraintNotSatisfied error,
although it's not clear what the name of the constraint should be in that case
(maybe the name of the requested media type?).

(handling the absence of a media device differently is odd, since one could
always get the same thing via a trivial mandatory constraint, e.g. video : {
mandatory : {width: { min:0}}} )

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Received on Monday, 3 June 2013 16:30:38 UTC