我不知道如何在VLC视频输出上显示文本。播放视频后，我放在视频界面小部件顶部的每个小部件都会消失。例如，我将QFrame用作视频表面，然后在该QFrame中放置一个Qlabel。文本出现在框架上，但是视频消失了。在下面的MRE中，我取消self.Player.play()注释后，就会立即播放视频，文本也消失了。

import sys 
import vlc
from PyQt5.QtGui import QFont
from PyQt5.QtWidgets import QWidget,QApplication,QMainWindow,QFrame,QLabel,QVBoxLayout

class Player(QMainWindow):
    def __init__(self, parent=None):
        super(Player,self).__init__()
        self.Init_Gui()
    #   self.Player.play()

    def Init_Gui(self):
        centralWidget = QWidget()
        mainlayout = QVBoxLayout(centralWidget)
        self.resize(640,480)
        self.setCentralWidget(centralWidget)
        self.VideoSurface = QFrame()
        self.VideoSurface.setStyleSheet('background-color: black')

        self.OSDLabel = QLabel(self.VideoSurface)
        self.OSDLabel.setStyleSheet('color: white')
        font = QFont()
        font.setPointSize(18)
        self.OSDLabel.setFont(font)
        self.OSDLabel.setText('Testing ....... Testing..... Testing.....')

        mainlayout.addWidget(self.VideoSurface)
        self.Instance = vlc.Instance()
        self.Player = self.Instance.media_player_new('e:/media/vid1.mp4')
        self.Player.set_hwnd(self.VideoSurface.winId())
        self.show()

if __name__=='__main__':
    MyApp = QApplication(sys.argv)
    MyGui = Player()
    sys.exit(MyApp.exec_())

解决方案

libvlc具有此功能，请参见https://github.com/oaubert/python-vlc/blob/d64c2e84093e1b60b45d8cbb84a53bc5608a1f15/generator/templates/footer.py#L180

player.video_set_marquee_string