[Bug 22052] New: Report statistics on errored video frames

https://www.w3.org/Bugs/Public/show_bug.cgi?id=22052

            Bug ID: 22052
           Summary: Report statistics on errored video frames
    Classification: Unclassified
           Product: HTML WG
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Media Source Extensions
          Assignee: adrianba@microsoft.com
          Reporter: watsonm@netflix.com
        QA Contact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-media@w3.org

We have found that in a system which is sufficiently large scale, things which
"cannot possibly happen", do happen.

For example, media data which has been checksummed at the server and delivered
over reliable connections sometimes suffers from data corruption, causing
errors in the video decoder. Another possibility is that a media file is not in
fact compliant to the codec profile that it claims to be, although in our
system this is either less common or doesn't cause errors.

We would like to be able to detect and report on these cases.

One proposal would be to add an 'erroredFrames' counter to the
MediaPlaybackQuality object.

Errored frames may either be rendered (with errors) or dropped based on the
media player implementation. We should discuss whether dropped errored frames
(where the error is due to the input data, not lack of time to complete
decoding) should be included in the dropped frames counter.

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Received on Wednesday, 15 May 2013 19:59:52 UTC