https://bugzilla.wikimedia.org/show_bug.cgi?id=28100

           Summary: Ogg header packets spanning multiple pages
           Product: MediaWiki extensions
           Version: any
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: OggHandler
        AssignedTo: tstarl...@wikimedia.org
        ReportedBy: tstarl...@wikimedia.org


The Vorbis specification explicitly allows for the comment header packet to
span multiple pages in the underlying bitstream. File_Ogg doesn't support this:
it assumes that the whole packet will be contiguous on disk, and doesn't allow
for page headers to be interspersed. 

This was reported on IRC when a user tried to upload an Ogg file with a
COVERART comment, which contained a JPEG image encoded with base-64.

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