如何使用声音+ python + qt在树莓派中显示任何视频

Question

我有覆盆子pi3。我想用phonon + qt + python显示任何类型的视频。我不想在QT中使用C++。我曾尝试使用以下代码，但它给出错误，如：没有名为phonon的模块。我已经使用sudo apt-get install phonon来安装声子，但它仍然会给出这样的错误。任何人都知道如何解决这个问题，或者有没有其他的方式来使用python + qt来显示视频，或者有没有其他的方法来安装声子？

from PyQt4 import QtGui, QtCore 
import PyQt4.phonon 

class Window(QtGui.QWidget): 
    def __init__(self): 
     QtGui.QWidget.__init__(self) 
     self.media = phonon.MediaObject(self) 
     self.media.stateChanged.connect(self.handleStateChanged) 
     self.video = phonon.VideoWidget(self) 
     self.video.setMinimumSize(400, 400) 
     self.audio = phonon.AudioOutput(phonon.VideoCategory, self) 
     phonon.createPath(self.media, self.audio) 
     phonon.createPath(self.media, self.video) 
     self.button = QtGui.QPushButton('Choose File', self) 
     self.button.clicked.connect(self.handleButton) 
     self.list = QtGui.QListWidget(self) 
     self.list.addItems(phonon.BackendCapabilities.availableMimeTypes()) 
     layout = QtGui.QVBoxLayout(self) 
     layout.addWidget(self.video, 1) 
     layout.addWidget(self.button) 
     layout.addWidget(self.list) 

    def handleButton(self): 
     if self.media.state() == phonon.PlayingState: 
      self.media.stop() 
     else: 
      path = QtGui.QFileDialog.getOpenFileName(self, self.button.text()) 
      if path: 
       self.media.setCurrentSource(phonon.MediaSource(path)) 
       self.media.play() 

    def handleStateChanged(self, newstate, oldstate): 
     if newstate == phonon.PlayingState: 
      self.button.setText('Stop') 
     elif (newstate != phonon.LoadingState and 
       newstate != phonon.BufferingState): 
      self.button.setText('Choose File') 
      if newstate == phonon.ErrorState: 
       source = self.media.currentSource().fileName() 
       print ('ERROR: could not play:', source.toLocal8Bit().data()) 
       print (' %s' % self.media.errorString().toLocal8Bit().data()) 

if __name__ == '__main__': 

    import sys 
    app = QtGui.QApplication(sys.argv) 
    app.setApplicationName('phonon Player') 
    window = Window() 
    window.show() 
    sys.exit(app.exec_()) 

Answer 1

您必须安装声子用下面的命令PyQt的：

sudo apt-get install python-qt4-phonon 

此外，你必须纠正你的代码的某些进口部分：

from PyQt4 import QtGui 
from PyQt4.phonon import Phonon 


class Window(QtGui.QWidget): 
    def __init__(self, parent=None): 
     super(Window, self).__init__(parent=parent) 
     self.media = Phonon.MediaObject(self) 
     self.video = Phonon.VideoWidget(self) 
     self.video.setMinimumSize(400, 400) 
     self.audio = Phonon.AudioOutput(Phonon.VideoCategory, self) 
     Phonon.createPath(self.media, self.audio) 
     Phonon.createPath(self.media, self.video) 
     self.button = QtGui.QPushButton('Choose File', self) 

     self.list = QtGui.QListWidget(self) 
     self.list.addItems(Phonon.BackendCapabilities.availableMimeTypes()) 
     layout = QtGui.QVBoxLayout(self) 
     layout.addWidget(self.video, 1) 
     layout.addWidget(self.button) 
     layout.addWidget(self.list) 

     self.media.stateChanged.connect(self.handleStateChanged) 
     self.button.clicked.connect(self.handleButton) 

    def handleButton(self): 
     if self.media.state() == Phonon.PlayingState: 
      self.media.stop() 
     else: 
      path = QtGui.QFileDialog.getOpenFileName(self, self.button.text()) 
      if path: 
       self.media.setCurrentSource(Phonon.MediaSource(path)) 
       self.media.play() 

    def handleStateChanged(self, newstate, oldstate): 
     if newstate == Phonon.PlayingState: 
      self.button.setText('Stop') 
     elif newstate != Phonon.LoadingState and newstate != Phonon.BufferingState: 
      self.button.setText('Choose File') 
      if newstate == Phonon.ErrorState: 
       source = self.media.currentSource().fileName() 
       print('ERROR: could not play:', source.toLocal8Bit().data()) 
       print(' %s' % self.media.errorString().toLocal8Bit().data()) 


if __name__ == '__main__': 
    import sys 

    app = QtGui.QApplication(sys.argv) 
    app.setApplicationName('phonon Player') 
    window = Window() 
    window.show() 
    sys.exit(app.exec_()) 

截图：