QMediaPlayer回到MainWindow QT

Question

我使用这个qt类将.mp4文件作为一个小块来播放，但是它不允许我在上面添加按钮或其他任何东西。

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好吧，QMediaPlayer已经把它放在了继承‘集中式小部件和小部件’的位置上，但是没有成功，下面是代码

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) {
ui->setupUi(this);
videoWidget = new QVideoWidget(ui->centralwidget);
player      = new QMediaPlayer;

player->setVideoOutput(videoWidget);
player->setSource(QUrl::fromLocalFile("C:/Users/felli/Desktop/teste/videoplayback (2).mp4"));
player->setLoops(QMediaPlayer::Infinite);
player->play();

videoWidget->resize(1280, 720);
videoWidget->show();

pb = new QProgressBar(videoWidget);
pb->setGeometry(QRect(370, 370, 118, 23));
pb->setValue(30);
pb->show();

Answer 1

问题在于，您将进度条与视频小部件绑定在一起，而不是像您所希望的那样显示在顶部。

这段代码对我来说很好：

#include <QApplication>
#include <QProgressBar>

#include <QMediaPlayer>
#include <QVideoWidget>

int main(int argc, char** argv)
{
  QApplication app(argc, argv);

  QVideoWidget *videoWidget = new QVideoWidget();
  QMediaPlayer *player = new QMediaPlayer;
  
  player->setVideoOutput(videoWidget);
  player->setSource(QUrl::fromLocalFile("C:/Users/felli/Desktop/teste/videoplayback (2).mp4"));
  player->setLoops(QMediaPlayer::Infinite);
  player->play();
  
  videoWidget->resize(1280, 720);
  videoWidget->show();
  
  // Not parent it to the video widget to show it on top
  QProgressBar *pb = new QProgressBar();
  pb->setGeometry(QRect(370, 370, 118, 23));
  pb->setValue(30);
  pb->show();

  return app.exec();
}