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  1. Qt
  2. QTBUG-45174

setBufferSize() causes wrong playback rate in Windows 7 VMWare

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Details

    • Bug
    • Resolution: Done
    • 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

    Description

      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.

      Attachments

        1. broken.txt
          59 kB
        2. works.txt
          123 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-71760 QSoundEffect low latency issue

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              valentyn.doroshchuk Valentyn Doroshchuk
              qtcomsupport Qt Support
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              Dates

                Created:
                Updated:
                Resolved:

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