Details
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Bug
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Resolution: Done
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P3: Somewhat important
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5.6.0, 5.7.0, 5.8.0, 5.10.0
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None
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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.