[Bug 17243] New: suggestion on "select camera function for getUserMedia()"

https://www.w3.org/Bugs/Public/show_bug.cgi?id=17243

           Summary: suggestion on "select camera function for
                    getUserMedia()"
           Product: HTML.next
           Version: unspecified
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P2
         Component: default
        AssignedTo: dave.null@w3.org
        ReportedBy: eric.sun@huawei.com
         QAContact: public-html-bugzilla@w3.org
                CC: plh@w3.org, mike@w3.org


now there is navigator.getUserMedia() function for html5
But JavaScript can only return 1 stream returned by getUserMedia can capture
the stream by successCallback.

For example:
getUserMedia({video:true},successCallback,errorCallback)
function successCallback(stream)
{
  video.src = URL.createObjectURL(stream)
}

Now when we develop some face detection feature using html5, we have 2 or more
camera connect to browser, but only by browser UI can we choose which camera
can we use.We can not let JS to choose which camera can use, then use JS to
manipulate the camera chosen for face detection.

So, can we in future HTML let getUserMedia return references for all available
cameras connect to browser in a array, so we can iterate streams and let JS to
choose the one we want for later processing, Or in some 3D scenario, to
manipulate multiple streams from cameras to show some 3D scene. for example a
better quality camera for face detection. 

And streams Array returned by getUserMedia can contain quality information （1
standard for 1 mega-pixel, 5 standard for mega-pixel ）or optionally the
description of the camera, so JS can choose by filtering or comparision.

For example:
getUserMedia({video:true},successCallback,errorCallback)
function successCallback((Array type)streams)
{
 while(i<streams.length）
 {
 if streams(i).quality>5
 video.src=url.createObjectURL(stream(i))
 break;
 ......
 }
}

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Received on Wednesday, 30 May 2012 07:56:30 UTC