如何在pyqt5中让vlc视频全屏播放？

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget
from PyQt5.QtCore import Qt
import vlc

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("VLC视频全屏播放")
        self.player = None
        self.vlc_instance = vlc.Instance()
        self.media_player = self.vlc_instance.media_player_new()

    def play_video(self, video_path):
        self.player = self.media_player
        media = self.vlc_instance.media_new(video_path)
        self.player.set_media(media)
        self.player.play()

class VideoWidget(QWidget):
    def __init__(self, player):
        super().__init__()
        self.player = player
        layout = QVBoxLayout()
        layout.addWidget(self.player)
        self.setLayout(layout)

    def keyPressEvent(self, event):
        if event.key() == Qt.Key_Escape:
            self.player.fullscreen()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    video_widget = VideoWidget(window.media_player)
    window.setCentralWidget(video_widget)
    window.play_video("视频文件路径")
    window.show()
    sys.exit(app.exec_())