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  1. Qt
  2. QTBUG-52114

Video playback lags within QGraphicsScene

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Details

    • Bug
    • Resolution: Done
    • P3: Somewhat important
    • 5.12.0
    • 5.6.0, 5.7.0, 5.8.0, 5.10.0
    • Multimedia
    • None
    • Windows 7 x64
      Qt-5.6.0-msvc2013-x86
      Qt-5.7.0-msvc2013-x86-alpha

    Description

      Audio-video playback lags within QGraphicsScene when QMediaPlayer is attached to QGraphicsVideoItem or QVideoWidget added by QGraphicsScene::addWidget.

      QGraphicsVideoItem has large size and Qt::KeepAspectRatioByExpanding option.

      Qt 5.5.1 doesn't have this bug.

      Added 2017-12-07:
      Qt 5.10.0 release version
      With QGLWidget performance is better, but not as good as performance of Qt-5.5.1 or QVideoWidget. And lags are still there.

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            valentyn.doroshchuk Valentyn Doroshchuk
            moneyiac Mike
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            Dates

              Created:
              Updated:
              Resolved:

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