<![CDATA[QGraphicsVideoItem mirror ?]]>QGraphicsScene *scene = new QGraphicsScene; QGraphicsVideoItem *GVI = new QGraphicsVideoItem; GVI->setSize(QSizeF(800,600)); scene->addItem(GVI); ui->graphicsView->setScene(scene); QMediaPlayer *player = new QMediaPlayer; player->setVideoOutput(GVI); //GVI.scale(-1,1); // QT_DEPRECATED_SINCE(5, 0) ? GVI->setTransform(QTransform::fromScale(-1, 1)); // QMediaPlayer stopped and can not play anymore ]]>https://forum.qt.io/topic/114836/qgraphicsvideoitem-mirrorRSS for NodeThu, 05 Nov 2026 03:40:55 GMTFri, 15 May 2020 03:51:54 GMT60<![CDATA[Reply to QGraphicsVideoItem mirror ? on Sat, 16 May 2020 03:45:32 GMT]]>@Bonnie It seems must use this format:

setTransform(QTransform().translate(x, y).scale(-1, 1).translate(-x, -y),
]]>https://forum.qt.io/post/595060https://forum.qt.io/post/595060Sat, 16 May 2020 03:45:32 GMT<![CDATA[Reply to QGraphicsVideoItem mirror ? on Fri, 15 May 2020 19:31:18 GMT]]>@sonichy Does the sound stop too? When I tried, the mediaplayer does not stop, but the video moved to somewhere invisible.
Try

//the center of video
qreal x = GVI->boundingRect().width() / 2.0;
qreal y = GVI->boundingRect().height() / 2.0;
GVI->setTransform(QTransform().translate(x, y).scale(-1, 1).translate(-x, -y), true);
]]>https://forum.qt.io/post/595017https://forum.qt.io/post/595017Fri, 15 May 2020 19:31:18 GMT<![CDATA[Reply to QGraphicsVideoItem mirror ? on Fri, 15 May 2020 18:42:14 GMT]]>Hi,

What version of Qt ?
What OS ?
What video file format ?
What is exactly the question ?

]]>https://forum.qt.io/post/595007https://forum.qt.io/post/595007Fri, 15 May 2020 18:42:14 GMT