[Webkit-unassigned] [Bug 34631] [Qt] Switching from Phonon to QtMultimedia Backend for Qt 4.7

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=34631





--- Comment #31 from Eric Carlson <eric.carlson at apple.com>  2010-02-19 07:15:04 PST ---
(In reply to comment #26)
> - Sublime Video HTML5 Player
> > http://jilion.com/sublime/video
> (Note that on OSX, QuickTime requires the entire movie to be buffered before it
> will play. This seems to be specific to some HD movies, including the one used
> on this page.) 
> 
That is a symptom of a movie that was not "flattened", saving so the 'moov'
atom (the movie table of contents) is at the beginning of the file. Looking at
the sublime mp4 file that is indeed the case:

    'ftyp'  size: 28  offset: 0   - File Type
    'free'  size: 132  offset: 28   - Free Space
    'mdat'  size: 29887735  offset: 160   - Movie Data
    'moov'  size: 69206  offset: 29887895   - Movie

This means that if the client doesn't support reading the file with byte range
requests, as is the case with "classic" QuickTime, it has to read 29887895
bytes before it gets to the tables it needs to understand the media data.

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