[Bug 22143] New: MediaPlaybackQuality interface should limited to HTML5VideoElement

https://www.w3.org/Bugs/Public/show_bug.cgi?id=22143

            Bug ID: 22143
           Summary: MediaPlaybackQuality interface should limited to
                    HTML5VideoElement
    Classification: Unclassified
           Product: HTML WG
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Media Source Extensions
          Assignee: adrianba@microsoft.com
          Reporter: jdsmith@microsoft.com
        QA Contact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-media@w3.org

Section 7.2 of the current draft adds MediaPlaybackQuality to the
HTMLMediaElement.  These can be audio only, in which case the frame quality
metrics shouldn't apply.

Recommend replacing HTMLMediaElement with HTMLVideoElement in 7.2:

7.2 New Attributes and Behavior

This section specifies new attributes and internal state that are being added
to the HTMLVideoElement.

Each HTMLVideoElement will maintain a total video frame count variable that
keeps track of the total number of frames that have been displayed and dropped.
This variable is initialized to 0 when the element is created and whenever the
media element load algorithm is invoked. It is incremented when a video frame
is displayed or when the dropped video frame count is incremented.

Each HTMLVideoElement will maintain a dropped video frame count variable that
keeps track of the total number of frames that have been dropped. This variable
is initialized to 0 when the element is created and whenever the media element
load algorithm is invoked. It is incremented when a video frame is dropped
predecode or when a frame is decoded but dropped because it missed a display
deadline.

partial interface HTMLVideoElement{
    readonly    attribute MediaPlaybackQuality playbackQuality;
};

This paragraph is a subparagraph of 7. HTMLMediaElement Extensions, which makes
this fit a little awkward.  It fully describes the requested change though.

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Received on Wednesday, 22 May 2013 20:05:25 UTC