使用QCamera翻转活动提要

Question

我在主窗口上有Qlabel小部件(对象名= label_2)。我在这个小部件上显示来自摄像头的实时提要。一切都很好。然而，我想知道如何改变实时馈送的方向(比如说，我想把它翻转90°)。

QList<QCameraInfo> cameras = QCameraInfo::availableCameras();
foreach (const QCameraInfo &cameraInfo, cameras)
{
    if (cameraInfo.deviceName() == "@device:pnp:\\\\?\\pci#ven_109e&dev_036e&subsys_00000000&rev_11#5&12a6b002&0&000008#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\\global")
    cM2 = new QCamera(cameraInfo, this);
}
cV2 = new QCameraViewfinder(this);
cM2->setViewfinder(cV2);
cBox2 = new QVBoxLayout();
cBox2->addWidget(cV2);
ui->label_2->setLayout(cBox2);
cM2->start();

Answer 1

QCameraViewfinder不旋转，所以使用QGraphicsVideoviewer可能会更好。

类似于：

#include <QGraphicsVideoItem>

videoItem = new QGraphicsVideoItem;
videoItem->setSize(QSizeF(640, 480));

GraphicsScene *scene = new QGraphicsScene(this);
QGraphicsView *graphicsView = new QGraphicsView(scene);

scene->addItem(videoItem);

cM2->setViewfinder(videoItem);
videoItem->setTransform(QTransform().rotate(90));

cBox2->addWidget(graphicsView);