使用VLC在PyQT5中新播放另一个视频文件

Question

我正在编写一个脚本，启动时会按编号播放视频。然后，在播放结束后，脚本会询问下次播放的视频编号，依此类推。我在 PyQT5 中使用 VLC python。

import sys
import time
import vlc

from PyQt5 import QtGui, QtWidgets
from PyQt5.QtCore import Qt


class Player(QtWidgets.QMainWindow):
    
    
    def __init__(self, parent=None):
        super(Player, self).__init__(parent)
        self.setWindowTitle("Media Player")
        # creating a basic vlc instance
        self.instance = vlc.Instance(['--video-on-top'])
        self.instance.log_unset()
        
        self.media=None
        
        self.mediaplayer = self.instance.media_player_new()
        
        self.create_ui()
        self.open_file()
    def create_ui(self):
        
        
        self.videoframe = QtWidgets.QFrame(
            frameShape=QtWidgets.QFrame.Box, frameShadow=QtWidgets.QFrame.Raised)

        if sys.platform.startswith("linux"):  # for Linux using the X Server
            self.mediaplayer.set_xwindow(self.videoframe.winId())
        elif sys.platform == "win32":  # for Windows
            self.mediaplayer.set_hwnd(self.videoframe.winId())
        elif sys.platform == "darwin":  # for MacOS
            self.mediaplayer.set_nsobject(self.videoframe.winId())

        central_widget = QtWidgets.QWidget()
        self.setCentralWidget(central_widget)
        self.setWindowFlags(Qt.FramelessWindowHint)
        lay = QtWidgets.QVBoxLayout(central_widget)
        lay.addWidget(self.videoframe)
        
    def play(self):
        if self.mediaplayer.play() == -1:
           self.open_file()
        self.mediaplayer.play()
    
    def open_file(self):
        numberfile = input("Number file: ")
        filename = (f"/home/Tadont/Video/{numberfile}.mp4")
        self.media = self.instance.media_new(filename)
        self.mediaplayer.set_media(self.media)
        self.eventManager=self.mediaplayer.event_manager()
        self.eventManager.event_attach(vlc.EventType.MediaPlayerEndReached, self.next_file)
        self.play()
        
      
    def next_file(self, event):
         if event.type == vlc.EventType.MediaPlayerEndReached:
             #self.mediaplayer.stop()
             self.open_file()
        
        

def main():   
   app = QtWidgets.QApplication(sys.argv)
   player = Player()
   player.show()
   player.move(1, 1)
   player.resize(406, 86)
   player.setObjectName("MainWindow")
   player.setStyleSheet("#MainWindow{background-color:black}")
   sys.exit(app.exec_())


if __name__ == "__main__":
   main()

我有第一个文件要播放，然后我写入第二个播放的文件编号，但第二个文件没有开始。如何解决这个问题？

我想我没有新的

self.media

Answer 1

这是因为 VLC

MediaPlayerEndReached

事件的回调将在工作线程上运行，而不是在主线程上运行。因此，使用线程间信号机制或

postEvent()

。

这是后者的一个例子。

...
from PyQt5.QtCore import QCoreApplication, QEvent
...
class Player(QtWidgets.QMainWindow):
    ...
    def open_file(self):
        ....
        self.eventManager=self.mediaplayer.event_manager()
        self.eventManager.event_attach(vlc.EventType.MediaPlayerEndReached,
            lambda _: QCoreApplication.postEvent(self, QEvent(QEvent.User))
        self.play()

    def customEvent(self, event):
        # You need to dispatch if you use custom events for other cases.
        self.open_file()
...