python - 如何在树莓派中使用 phonon + python + qt 显示任何视频

Question

我有树莓派3。我想使用 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，但它给出的错误如下:没有名为 phonon 的模块。我已经使用 sudo apt-get install phonon 安装 phonon，但仍然出现这样的错误。任何人都知道如何解决这个问题，或者有没有其他方法可以使用 python + qt 显示视频，或者有其他方法可以安装 phonon？

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

您必须使用以下命令为 pyqt 安装 phonon:

sudo apt-get install python-qt4-phonon

此外，您必须更正某些导入和部分代码:

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_())

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