pyside2 视频播放进度条

你可以通过使用 PySide2 来实现视频播放进度条。以下是一个简单的示例代码：

import sys
from PySide2.QtCore import Qt
from PySide2.QtWidgets import QApplication, QMainWindow, QSlider, QStyle, QWidget, QVBoxLayout, QLabel, QFileDialog, QPushButton, QHBoxLayout, QMessageBox
from PySide2.QtMultimedia import QMediaPlayer, QMediaContent, QMediaMetaData

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("视频播放器")
        self.setGeometry(100, 100, 800, 600)

        self.mediaPlayer = QMediaPlayer(None, QMediaPlayer.VideoSurface)
        self.mediaPlayer.setVolume(50)

        self.videoWidget = QWidget(self)
        self.setCentralWidget(self.videoWidget)

        self.slider = QSlider(Qt.Horizontal)
        self.slider.setRange(0, 0)
        self.slider.sliderMoved.connect(self.setSliderValue)

        self.playButton = QPushButton("播放")
        self.playButton.clicked.connect(self.play)

        self.openButton = QPushButton("打开")
        self.openButton.clicked.connect(self.openFile)

        controlLayout = QHBoxLayout()
        controlLayout.setContentsMargins(0, 0, 0, 0)
        controlLayout.addWidget(self.playButton)
        controlLayout.addWidget(self.openButton)

        layout = QVBoxLayout()
        layout.addWidget(self.videoWidget)
        layout.addWidget(self.slider)
        layout.addLayout(controlLayout)

        self.videoWidget.setLayout(layout)

        self.mediaPlayer.positionChanged.connect(self.setPosition)
        self.mediaPlayer.durationChanged.connect(self.setDuration)

    def openFile(self):
        fileName, _ = QFileDialog.getOpenFileName(self, "选择视频文件")
        
        if fileName != '':
            self.mediaPlayer.setMedia(QMediaContent(QUrl.fromLocalFile(fileName)))
            self.mediaPlayer.play()

    def play(self):
        if self.mediaPlayer.state() == QMediaPlayer.PlayingState:
            self.mediaPlayer.pause()
            self.playButton.setText("播放")
        else:
            self.mediaPlayer.play()
            self.playButton.setText("暂停")

    def setDuration(self, duration):
        self.slider.setMaximum(duration)

    def setPosition(self, position):
        self.slider.setValue(position)

    def setSliderValue(self, value):
        self.mediaPlayer.setPosition(value)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())

这段代码创建了一个简单的视频播放器窗口。窗口中包含一个播放/暂停按钮，一个打开按钮，以及一个进度条。你可以通过点击打开按钮选择一个视频文件进行播放。进度条会根据视频的播放进度进行更新。

请确保已经安装了 PySide2 和对应的视频解码器，以便正常运行该代码。