pyqt5-使用QMediaPlayer为QVideoWidget顶部的动画部件

Question

前段时间，我在QVideoWidget顶部显示控件

在发现这是一个已知问题并遵循this解决方法之后，我一直试图对该小部件进行动画处理，而无法获得所需的结果。

小部件的动画效果很好，但是，如果我添加两个小部件并使它们同时移动，则布局的白色背景会显示在视频顶部。

有没有解决此问题的方法？

这是代码

from PyQt5.QtCore import *
from PyQt5.QtMultimedia import *
from PyQt5.QtMultimediaWidgets import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
import sys

class VideoWindow(QMainWindow):
    def __init__(self, parent=None):
        super(VideoWindow, self).__init__(parent)
        self.setWindowTitle("PyQt Video Player Widget Example - pythonprogramminglanguage.com")

        self.mediaPlayer = QMediaPlayer(None, QMediaPlayer.VideoSurface)

        self.videoWidget = QVideoWidget()

        container = QWidget()
        lay = QVBoxLayout(container)
        lay.setContentsMargins(0, 0, 0, 0)
        lay.addWidget(self.videoWidget)

        self.buttonn = QPushButton("button", container)
        self.buttonn2 = QPushButton("button 2", container)

        self.playButton = QPushButton()
        self.playButton.setEnabled(False)
        self.playButton.setIcon(self.style().standardIcon(QStyle.SP_MediaPlay))
        self.playButton.clicked.connect(self.play)

        self.positionSlider = QSlider(Qt.Horizontal)
        self.positionSlider.setRange(0, 0)
        self.positionSlider.sliderMoved.connect(self.setPosition)

        self.errorLabel = QLabel()
        self.errorLabel.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.Maximum)

        # Create new action
        openAction = QAction(QIcon('open.png'), '&Open', self)
        openAction.setShortcut('Ctrl+O')
        openAction.setStatusTip('Open movie')
        openAction.triggered.connect(self.openFile)

        # Create exit action
        exitAction = QAction(QIcon('exit.png'), '&Exit', self)
        exitAction.setShortcut('Ctrl+Q')
        exitAction.setStatusTip('Exit application')
        exitAction.triggered.connect(self.close)

        # Create menu bar and add action
        menuBar = self.menuBar()
        fileMenu = menuBar.addMenu('&File')
        # fileMenu.addAction(newAction)
        fileMenu.addAction(openAction)
        fileMenu.addAction(exitAction)

        # Create a widget for window contents
        wid = QWidget(self)
        self.setCentralWidget(wid)

        # Create layouts to place inside widget
        controlLayout = QHBoxLayout()
        controlLayout.setContentsMargins(0, 0, 0, 0)
        controlLayout.addWidget(self.playButton)
        controlLayout.addWidget(self.positionSlider)

        layout = QVBoxLayout()
        layout.addWidget(container)
        layout.addLayout(controlLayout)
        layout.addWidget(self.errorLabel)

        # Set widget to contain window contents
        wid.setLayout(layout)

    def openFile(self):
        fileName, _ = QFileDialog.getOpenFileName(self, "Open Movie", QDir.homePath())

        if fileName:
            self.mediaPlayer.setMedia(QMediaContent(QUrl.fromLocalFile(fileName)))
            self.playButton.setEnabled(True)

    def play(self):
        if self.mediaPlayer.state() == QMediaPlayer.PlayingState:
            self.mediaPlayer.pause()
        else:
            self.mediaPlayer.play()
            self.mediaPlayer.setVideoOutput(self.videoWidget)
            self.mediaPlayer.stateChanged.connect(self.mediaStateChanged)
            self.mediaPlayer.positionChanged.connect(self.positionChanged)
            self.mediaPlayer.durationChanged.connect(self.durationChanged)
            self.mediaPlayer.error.connect(self.handleError)

            self.animation_group = QParallelAnimationGroup()

            self.anim = QPropertyAnimation(self.buttonn, b"geometry")
            self.anim.setDuration(3000)
            self.anim.setStartValue(QRect(0, 0, 20, 20))
            self.anim.setEndValue(QRect(200, 250, 20, 20))
            self.animation_group.addAnimation(self.anim)

            self.anim = QPropertyAnimation(self.buttonn2, b"geometry")
            self.anim.setDuration(3000)
            self.anim.setStartValue(QRect(60, 30, 20, 20))
            self.anim.setEndValue(QRect(400, 290, 20, 20))
            self.animation_group.addAnimation(self.anim)

            self.animation_group.start()

    def mediaStateChanged(self, state):
        if self.mediaPlayer.state() == QMediaPlayer.PlayingState:
            self.playButton.setIcon(
                self.style().standardIcon(QStyle.SP_MediaPause))
        else:
            self.playButton.setIcon(
                self.style().standardIcon(QStyle.SP_MediaPlay))

    def positionChanged(self, position):
        self.positionSlider.setValue(position)

    def durationChanged(self, duration):
        self.positionSlider.setRange(0, duration)

    def setPosition(self, position):
        self.mediaPlayer.setPosition(position)

    def handleError(self):
        self.playButton.setEnabled(False)
        self.errorLabel.setText("Error: " + self.mediaPlayer.errorString())

if __name__ == '__main__':
    app = QApplication(sys.argv)
    player = VideoWindow()
    player.resize(640, 480)
    player.show()
    sys.exit(app.exec_())