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  1. Qt
  2. QTBUG-45174

setBufferSize() causes wrong playback rate in Windows 7 VMWare

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P2: Important P2: Important
    • 5.12.0
    • 5.4.1
    • Multimedia
    • 1) 2008 Mac Pro (Quad Xeon) running Windows 7 via Boot Camp
      2) 2008 Mac Pro (Quad Xeon) running Windows 7 in a VMWare Fusion VM
      3) 2014 MacBook Pro Retina running Windows 7 in a VMware Fusion VM

      Tested in example qtmultimedia\examples\audiooutput. Set buffer size right after m_audioOutput creation:

      m_audioOutput->setBufferSize((m_format.sampleRate()*m_format.channelCount()*(m_format.sampleSize()/8))/20); // 50mS buffer

      The sine wave sound is now very stuttery and not correct.
      This problem does not occur under MacOS/X.

        1. broken.txt
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        2. works.txt
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            valentyn.doroshchuk Valentyn Doroshchuk
            qtcomsupport Qt Support
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              Created:
              Updated:
              Resolved:

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