[Webkit-unassigned] [Bug 82348] New: Audio Element playbackrate < .5 are rounded up

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Mar 27 09:07:42 PDT 2012


https://bugs.webkit.org/show_bug.cgi?id=82348

           Summary: Audio Element playbackrate < .5 are rounded up
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.7
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Media Elements
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: terryr at adobe.com


When using the playbackrate attribute of the audio element, rates less then .5 are rounded up to .5. 

The attached example shows this in action.  There are several buttons that playback the content at different rates. 
Playback rates for values from .5-2 are accurate.
The page predicts playback duration for each button press based on audio duration/rate. 
Under .5 always yield actual durations approximate to predicted rates
Over .5 always yield actual durations approximate durations based on a .5 rate.

A casual listen to the audio at a ridiculously slow playback rate (say .1) will clearly sound like only half speed.

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