使用 PyQt6 创建简单的视频播放器

Question

我试图使用 PyQt6 创建一个简单的视频播放器。我在互联网上找到了这个例子：

import sys
from PyQt6.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QPushButton, QSlider
from PyQt6.QtMultimedia import QMediaPlayer, QMediaContent
from PyQt6.QtMultimediaWidgets import QVideoWidget
from PyQt6.QtCore import QUrl, Qt


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

        self.setWindowTitle("Video Player")
        self.setGeometry(100, 100, 1024, 768)

        self.media_player = QMediaPlayer(None, QMediaPlayer.VideoSurface)
        self.video_widget = QVideoWidget()

        self.start_button = QPushButton("Start")
        self.start_button.clicked.connect(self.start_video)

        self.pause_button = QPushButton("Pause")
        self.pause_button.clicked.connect(self.pause_video)

        self.stop_button = QPushButton("Stop")
        self.stop_button.clicked.connect(self.stop_video)

        self.slider = QSlider(Qt.Orientation.Horizontal)
        self.slider.sliderMoved.connect(self.set_position)

        self.media_player.setVideoOutput(self.video_widget)
        self.media_player.setMedia(QMediaContent(QUrl.fromLocalFile("Video.mp4")))
        self.media_player.positionChanged.connect(self.position_changed)
        self.media_player.durationChanged.connect(self.duration_changed)

        layout = QVBoxLayout()
        layout.addWidget(self.video_widget)
        layout.addWidget(self.start_button)
        layout.addWidget(self.pause_button)
        layout.addWidget(self.stop_button)
        layout.addWidget(self.slider)

        container = QWidget()
        container.setLayout(layout)
        self.setCentralWidget(container)

    def start_video(self):
        self.media_player.play()

    def pause_video(self):
        self.media_player.pause()

    def stop_video(self):
        self.media_player.stop()

    def set_position(self, position):
        self.media_player.setPosition(position)

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

    def duration_changed(self, duration):
        self.slider.setRange(0, duration)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    video_player = VideoPlayer()
    video_player.show()
    sys.exit(app.exec())

但这不起作用。据我了解，不再支持“QMediaContent”和“QMediaPlayer.VideoSurface”类。我如何更改此代码以使播放器正常工作？

我一直在试图找到这些类被替换了什么，但目前互联网上关于在 PyQt6 中播放视频的信息很少。

Answer 1

PyQt5：

QMediaPlayer(parent=None, flags=QMediaPlayer.Flags())
QMediaPlayer.media # property of type QMediaContent
QMediaPlayer.setMedia(media, stream=None)

PyQt6：删除了 QMediaPlayer.Flags 枚举，删除了 QMediaContent 类，并将media属性替换为source。

QMediaPlayer(parent=None)
QMediaPlayer.source # property of type QUrl
QMediaPlayer.setSource(source)

该示例可以通过相应地更改这两行来修复。

class VideoPlayer(QMainWindow):
    def __init__(self):
        super().__init__()
        ...
        self.media_player = QMediaPlayer()
        self.media_player.setSource(QUrl.fromLocalFile("Video.mp4"))
        
        self.video_widget = QVideoWidget()
        self.media_player.setVideoOutput(self.video_widget)
        ...

有关更改的完整列表，请参阅Qt Multimedia 的更改。