pyqy5でwmv動画を再生させるときに、brightness,contrast,hue,saturationを変化させたいです。下は試しに書いてみたコードです。

from PyQt5.QtCore import QDir, Qt, QUrl
from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
from PyQt5.QtMultimediaWidgets import QVideoWidget
from PyQt5.QtWidgets import (QApplication, QFileDialog, QHBoxLayout, QLabel,
        QPushButton, QSizePolicy, QSlider, QStyle, QVBoxLayout, QWidget)


class VideoPlayer(QWidget):

    def __init__(self, parent=None):
        super(VideoPlayer, self).__init__(parent)

        self.mediaPlayer = QMediaPlayer(None, QMediaPlayer.VideoSurface)

        videoWidget = QVideoWidget()

        openButton = QPushButton("Open...")
        openButton.clicked.connect(self.openFile)

        self.playButton = QPushButton()
        self.playButton.setEnabled(False)
        self.playButton.setIcon(self.style().standardIcon(QStyle.SP_MediaPlay))
        self.playButton.clicked.connect(self.play)

        self.positionSlider = QSlider(Qt.Horizontal)
        self.positionSlider.setRange(0, 0)
        self.positionSlider.sliderMoved.connect(self.setPosition)

        self.errorLabel = QLabel()
        self.errorLabel.setSizePolicy(QSizePolicy.Preferred,
                QSizePolicy.Maximum)

        controlLayout = QHBoxLayout()
        controlLayout.setContentsMargins(0, 0, 0, 0)
        controlLayout.addWidget(openButton)
        controlLayout.addWidget(self.playButton)
        controlLayout.addWidget(self.positionSlider)

        layout = QVBoxLayout()
        layout.addWidget(videoWidget)
        layout.addLayout(controlLayout)
        layout.addWidget(self.errorLabel)

        self.setLayout(layout)

        self.mediaPlayer.setVideoOutput(videoWidget)
        self.mediaPlayer.stateChanged.connect(self.mediaStateChanged)
        self.mediaPlayer.positionChanged.connect(self.positionChanged)
        self.mediaPlayer.durationChanged.connect(self.durationChanged)
        self.mediaPlayer.error.connect(self.handleError)

        print(videoWidget.brightness())
        videoWidget.setBrightness(50)
        videoWidget.setContrast(100)
        videoWidget.setHue(100)
        videoWidget.setSaturation(100)
        print(videoWidget.brightness())


    def openFile(self):
        fileName, _ = QFileDialog.getOpenFileName(self, "Open Movie",
                QDir.homePath())

        if fileName != '':
            self.mediaPlayer.setMedia(
                    QMediaContent(QUrl.fromLocalFile(fileName)))
            self.playButton.setEnabled(True)

    def play(self):
        if self.mediaPlayer.state() == QMediaPlayer.PlayingState:
            self.mediaPlayer.pause()
        else:
            self.mediaPlayer.play()

    def mediaStateChanged(self, state):
        if self.mediaPlayer.state() == QMediaPlayer.PlayingState:
            self.playButton.setIcon(
                    self.style().standardIcon(QStyle.SP_MediaPause))
        else:
            self.playButton.setIcon(
                    self.style().standardIcon(QStyle.SP_MediaPlay))

    def positionChanged(self, position):
        self.positionSlider.setValue(position)

    def durationChanged(self, duration):
        self.positionSlider.setRange(0, duration)

    def setPosition(self, position):
        self.mediaPlayer.setPosition(position)

    def handleError(self):
        self.playButton.setEnabled(False)
        self.errorLabel.setText("Error: " + self.mediaPlayer.errorString())


if __name__ == '__main__':

    import sys

    app = QApplication(sys.argv)

    player = VideoPlayer()
    player.resize(320, 240)
    player.show()

    sys.exit(app.exec_())

これを実行することで、
画像
の様なGUIが作成されます。ここで、再際される動画のbrightness,contrast,hue,saturationが変化したものが再生されるつもりでしたが、実行しても通常のままの動画が再生されました。また、このコードを描くときに参考にしたコードがしたのコードで(長いですが、そのまま載せます。申し訳ありません。)、そちらでは上記4つの変化を施すことが可能でした。私のコードをどのように直せばよいのでしょうか。

from PyQt5.QtCore import (pyqtSignal, pyqtSlot, Q_ARG, QAbstractItemModel,
        QFileInfo, qFuzzyCompare, QMetaObject, QModelIndex, QObject, Qt,
        QThread, QTime, QUrl)
from PyQt5.QtGui import QColor, qGray, QImage, QPainter, QPalette
from PyQt5.QtMultimedia import (QAbstractVideoBuffer, QMediaContent,
        QMediaMetaData, QMediaPlayer, QMediaPlaylist, QVideoFrame, QVideoProbe)
from PyQt5.QtMultimediaWidgets import QVideoWidget
from PyQt5.QtWidgets import (QApplication, QComboBox, QDialog, QFileDialog,
        QFormLayout, QHBoxLayout, QLabel, QListView, QMessageBox, QPushButton,
        QSizePolicy, QSlider, QStyle, QToolButton, QVBoxLayout, QWidget)


class VideoWidget(QVideoWidget):

    def __init__(self, parent=None):
        super(VideoWidget, self).__init__(parent)

        self.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored)

        p = self.palette()
        p.setColor(QPalette.Window, Qt.black)
        self.setPalette(p)

        self.setAttribute(Qt.WA_OpaquePaintEvent)

    def keyPressEvent(self, event):
        if event.key() == Qt.Key_Escape and self.isFullScreen():
            self.setFullScreen(False)
            event.accept()
        elif event.key() == Qt.Key_Enter and event.modifiers() & Qt.Key_Alt:
            self.setFullScreen(not self.isFullScreen())
            event.accept()
        else:
            super(VideoWidget, self).keyPressEvent(event)

    def mouseDoubleClickEvent(self, event):
        self.setFullScreen(not self.isFullScreen())
        event.accept()


class PlaylistModel(QAbstractItemModel):

    Title, ColumnCount = range(2)

    def __init__(self, parent=None):
        super(PlaylistModel, self).__init__(parent)

        self.m_playlist = None

    def rowCount(self, parent=QModelIndex()):
        return self.m_playlist.mediaCount() if self.m_playlist is not None and not parent.isValid() else 0

    def columnCount(self, parent=QModelIndex()):
        return self.ColumnCount if not parent.isValid() else 0

    def index(self, row, column, parent=QModelIndex()):
        return self.createIndex(row, column) if self.m_playlist is not None and not parent.isValid() and row >= 0 and row < self.m_playlist.mediaCount() and column >= 0 and column < self.ColumnCount else QModelIndex()

    def parent(self, child):
        return QModelIndex()

    def data(self, index, role=Qt.DisplayRole):
        if index.isValid() and role == Qt.DisplayRole:
            if index.column() == self.Title:
                location = self.m_playlist.media(index.row()).canonicalUrl()
                return QFileInfo(location.path()).fileName()

            return self.m_data[index]

        return None

    def playlist(self):
        return self.m_playlist

    def setPlaylist(self, playlist):
        if self.m_playlist is not None:
            self.m_playlist.mediaAboutToBeInserted.disconnect(
                    self.beginInsertItems)
            self.m_playlist.mediaInserted.disconnect(self.endInsertItems)
            self.m_playlist.mediaAboutToBeRemoved.disconnect(
                    self.beginRemoveItems)
            self.m_playlist.mediaRemoved.disconnect(self.endRemoveItems)
            self.m_playlist.mediaChanged.disconnect(self.changeItems)

        self.beginResetModel()
        self.m_playlist = playlist

        if self.m_playlist is not None:
            self.m_playlist.mediaAboutToBeInserted.connect(
                    self.beginInsertItems)
            self.m_playlist.mediaInserted.connect(self.endInsertItems)
            self.m_playlist.mediaAboutToBeRemoved.connect(
                    self.beginRemoveItems)
            self.m_playlist.mediaRemoved.connect(self.endRemoveItems)
            self.m_playlist.mediaChanged.connect(self.changeItems)

        self.endResetModel()

    def beginInsertItems(self, start, end):
        self.beginInsertRows(QModelIndex(), start, end)

    def endInsertItems(self):
        self.endInsertRows()

    def beginRemoveItems(self, start, end):
        self.beginRemoveRows(QModelIndex(), start, end)

    def endRemoveItems(self):
        self.endRemoveRows()

    def changeItems(self, start, end):
        self.dataChanged.emit(self.index(start, 0),
                self.index(end, self.ColumnCount))


class PlayerControls(QWidget):

    play = pyqtSignal()
    pause = pyqtSignal()
    stop = pyqtSignal()
    next = pyqtSignal()
    previous = pyqtSignal()
    changeVolume = pyqtSignal(int)
    changeMuting = pyqtSignal(bool)
    changeRate = pyqtSignal(float)

    def __init__(self, parent=None):
        super(PlayerControls, self).__init__(parent)

        self.playerState = QMediaPlayer.StoppedState
        self.playerMuted = False

        self.playButton = QToolButton(clicked=self.playClicked)
        self.playButton.setIcon(self.style().standardIcon(QStyle.SP_MediaPlay))

        self.stopButton = QToolButton(clicked=self.stop)
        self.stopButton.setIcon(self.style().standardIcon(QStyle.SP_MediaStop))
        self.stopButton.setEnabled(False)

        self.nextButton = QToolButton(clicked=self.next)
        self.nextButton.setIcon(
                self.style().standardIcon(QStyle.SP_MediaSkipForward))

        self.previousButton = QToolButton(clicked=self.previous)
        self.previousButton.setIcon(
                self.style().standardIcon(QStyle.SP_MediaSkipBackward))

        self.muteButton = QToolButton(clicked=self.muteClicked)
        self.muteButton.setIcon(
                self.style().standardIcon(QStyle.SP_MediaVolume))

        self.volumeSlider = QSlider(Qt.Horizontal,
                sliderMoved=self.changeVolume)
        self.volumeSlider.setRange(0, 100)

        self.rateBox = QComboBox(activated=self.updateRate)
        self.rateBox.addItem("0.5x", 0.5)
        self.rateBox.addItem("1.0x", 1.0)
        self.rateBox.addItem("2.0x", 2.0)
        self.rateBox.setCurrentIndex(1)

        layout = QHBoxLayout()
        layout.setContentsMargins(0, 0, 0, 0)
        layout.addWidget(self.stopButton)
        layout.addWidget(self.previousButton)
        layout.addWidget(self.playButton)
        layout.addWidget(self.nextButton)
        layout.addWidget(self.muteButton)
        layout.addWidget(self.volumeSlider)
        layout.addWidget(self.rateBox)
        self.setLayout(layout)

    def state(self):
        return self.playerState

    def setState(self,state):
        if state != self.playerState:
            self.playerState = state

            if state == QMediaPlayer.StoppedState:
                self.stopButton.setEnabled(False)
                self.playButton.setIcon(
                        self.style().standardIcon(QStyle.SP_MediaPlay))
            elif state == QMediaPlayer.PlayingState:
                self.stopButton.setEnabled(True)
                self.playButton.setIcon(
                        self.style().standardIcon(QStyle.SP_MediaPause))
            elif state == QMediaPlayer.PausedState:
                self.stopButton.setEnabled(True)
                self.playButton.setIcon(
                        self.style().standardIcon(QStyle.SP_MediaPlay))

    def volume(self):
        return self.volumeSlider.value()

    def setVolume(self, volume):
        self.volumeSlider.setValue(volume)

    def isMuted(self):
        return self.playerMuted

    def setMuted(self, muted):
        if muted != self.playerMuted:
            self.playerMuted = muted

            self.muteButton.setIcon(
                    self.style().standardIcon(
                            QStyle.SP_MediaVolumeMuted if muted else QStyle.SP_MediaVolume))

    def playClicked(self):
        if self.playerState in (QMediaPlayer.StoppedState, QMediaPlayer.PausedState):
            self.play.emit()
        elif self.playerState == QMediaPlayer.PlayingState:
            self.pause.emit()

    def muteClicked(self):
        self.changeMuting.emit(not self.playerMuted)

    def playbackRate(self):
        return self.rateBox.itemData(self.rateBox.currentIndex())

    def setPlaybackRate(self, rate):
        for i in range(self.rateBox.count()):
            if qFuzzyCompare(rate, self.rateBox.itemData(i)):
                self.rateBox.setCurrentIndex(i)
                return

        self.rateBox.addItem("%dx" % rate, rate)
        self.rateBox.setCurrentIndex(self.rateBox.count() - 1)

    def updateRate(self):
        self.changeRate.emit(self.playbackRate())


class FrameProcessor(QObject):

    histogramReady = pyqtSignal(list)

    @pyqtSlot(QVideoFrame, int)
    def processFrame(self, frame, levels):
        histogram = [0.0] * levels

        if levels and frame.map(QAbstractVideoBuffer.ReadOnly):
            pixelFormat = frame.pixelFormat()

            if pixelFormat == QVideoFrame.Format_YUV420P or pixelFormat == QVideoFrame.Format_NV12:
                # Process YUV data.
                bits = frame.bits()
                for idx in range(frame.height() * frame.width()):
                    histogram[(bits[idx] * levels) >> 8] += 1.0
            else:
                imageFormat = QVideoFrame.imageFormatFromPixelFormat(pixelFormat)
                if imageFormat != QImage.Format_Invalid:
                    # Process RGB data.
                    image = QImage(frame.bits(), frame.width(), frame.height(), imageFormat)

                    for y in range(image.height()):
                        for x in range(image.width()):
                            pixel = image.pixel(x, y)
                            histogram[(qGray(pixel) * levels) >> 8] += 1.0

            # Find the maximum value.
            maxValue = 0.0
            for value in histogram:
                if value > maxValue:
                    maxValue = value

            # Normalise the values between 0 and 1.
            if maxValue > 0.0:
                for i in range(len(histogram)):
                    histogram[i] /= maxValue

            frame.unmap()

        self.histogramReady.emit(histogram)


class HistogramWidget(QWidget):

    def __init__(self, parent=None):
        super(HistogramWidget, self).__init__(parent)

        self.m_levels = 128
        self.m_isBusy = False
        self.m_histogram = []
        self.m_processor = FrameProcessor()
        self.m_processorThread = QThread()

        self.m_processor.moveToThread(self.m_processorThread)
        self.m_processor.histogramReady.connect(self.setHistogram)

    def __del__(self):
        self.m_processorThread.quit()
        self.m_processorThread.wait(10000)

    def setLevels(self, levels):
        self.m_levels = levels

    def processFrame(self, frame):
        if self.m_isBusy:
            return

        self.m_isBusy = True
        QMetaObject.invokeMethod(self.m_processor, 'processFrame',
                Qt.QueuedConnection, Q_ARG(QVideoFrame, frame),
                Q_ARG(int, self.m_levels))

    @pyqtSlot(list)
    def setHistogram(self, histogram):
        self.m_isBusy = False
        self.m_histogram = list(histogram)
        self.update()

    def paintEvent(self, event):
        painter = QPainter(self)

        if len(self.m_histogram) == 0:
            painter.fillRect(0, 0, self.width(), self.height(),
                    QColor.fromRgb(0, 0, 0))
            return

        barWidth = self.width() / float(len(self.m_histogram))

        for i, value in enumerate(self.m_histogram):
            h = value * self.height()
            # Draw the level.
            painter.fillRect(barWidth * i, self.height() - h,
                    barWidth * (i + 1), self.height(), Qt.red)
            # Clear the rest of the control.
            painter.fillRect(barWidth * i, 0, barWidth * (i + 1),
                    self.height() - h, Qt.black)


class Player(QWidget):

    fullScreenChanged = pyqtSignal(bool)

    def __init__(self, playlist, parent=None):
        super(Player, self).__init__(parent)

        self.colorDialog = None
        self.trackInfo = ""
        self.statusInfo = ""
        self.duration = 0

        self.player = QMediaPlayer()
        self.playlist = QMediaPlaylist()
        self.player.setPlaylist(self.playlist)

        self.player.durationChanged.connect(self.durationChanged)
        self.player.positionChanged.connect(self.positionChanged)
        self.player.metaDataChanged.connect(self.metaDataChanged)
        self.playlist.currentIndexChanged.connect(self.playlistPositionChanged)
        self.player.mediaStatusChanged.connect(self.statusChanged)
        self.player.bufferStatusChanged.connect(self.bufferingProgress)
        self.player.videoAvailableChanged.connect(self.videoAvailableChanged)
        self.player.error.connect(self.displayErrorMessage)

        self.videoWidget = VideoWidget()
        self.player.setVideoOutput(self.videoWidget)

        self.playlistModel = PlaylistModel()
        self.playlistModel.setPlaylist(self.playlist)

        self.playlistView = QListView()
        self.playlistView.setModel(self.playlistModel)
        self.playlistView.setCurrentIndex(
                self.playlistModel.index(self.playlist.currentIndex(), 0))

        self.playlistView.activated.connect(self.jump)

        self.slider = QSlider(Qt.Horizontal)
        self.slider.setRange(0, self.player.duration() / 1000)

        self.labelDuration = QLabel()
        self.slider.sliderMoved.connect(self.seek)

        self.labelHistogram = QLabel()
        self.labelHistogram.setText("Histogram:")
        self.histogram = HistogramWidget()
        histogramLayout = QHBoxLayout()
        histogramLayout.addWidget(self.labelHistogram)
        histogramLayout.addWidget(self.histogram, 1)

        self.probe = QVideoProbe()
        self.probe.videoFrameProbed.connect(self.histogram.processFrame)
        self.probe.setSource(self.player)

        openButton = QPushButton("Open", clicked=self.open)

        controls = PlayerControls()
        controls.setState(self.player.state())
        controls.setVolume(self.player.volume())
        controls.setMuted(controls.isMuted())

        controls.play.connect(self.player.play)
        controls.pause.connect(self.player.pause)
        controls.stop.connect(self.player.stop)
        controls.next.connect(self.playlist.next)
        controls.previous.connect(self.previousClicked)
        controls.changeVolume.connect(self.player.setVolume)
        controls.changeMuting.connect(self.player.setMuted)
        controls.changeRate.connect(self.player.setPlaybackRate)
        controls.stop.connect(self.videoWidget.update)

        self.player.stateChanged.connect(controls.setState)
        self.player.volumeChanged.connect(controls.setVolume)
        self.player.mutedChanged.connect(controls.setMuted)

        self.fullScreenButton = QPushButton("FullScreen")
        self.fullScreenButton.setCheckable(True)

        self.colorButton = QPushButton("Color Options...")
        self.colorButton.setEnabled(False)
        self.colorButton.clicked.connect(self.showColorDialog)

        displayLayout = QHBoxLayout()
        displayLayout.addWidget(self.videoWidget, 2)
        displayLayout.addWidget(self.playlistView)

        controlLayout = QHBoxLayout()
        controlLayout.setContentsMargins(0, 0, 0, 0)
        controlLayout.addWidget(openButton)
        controlLayout.addStretch(1)
        controlLayout.addWidget(controls)
        controlLayout.addStretch(1)
        controlLayout.addWidget(self.fullScreenButton)
        controlLayout.addWidget(self.colorButton)

        layout = QVBoxLayout()
        layout.addLayout(displayLayout)
        hLayout = QHBoxLayout()
        hLayout.addWidget(self.slider)
        hLayout.addWidget(self.labelDuration)
        layout.addLayout(hLayout)
        layout.addLayout(controlLayout)
        layout.addLayout(histogramLayout)

        self.setLayout(layout)

        if not self.player.isAvailable():
            QMessageBox.warning(self, "Service not available",
                    "The QMediaPlayer object does not have a valid service.\n"
                    "Please check the media service plugins are installed.")

            controls.setEnabled(False)
            self.playlistView.setEnabled(False)
            openButton.setEnabled(False)
            self.colorButton.setEnabled(False)
            self.fullScreenButton.setEnabled(False)

        self.metaDataChanged()

        self.addToPlaylist(playlist)

    def open(self):
        fileNames, _ = QFileDialog.getOpenFileNames(self, "Open Files")
        self.addToPlaylist(fileNames)

    def addToPlaylist(self, fileNames):
        for name in fileNames:
            fileInfo = QFileInfo(name)
            if fileInfo.exists():
                url = QUrl.fromLocalFile(fileInfo.absoluteFilePath())
                if fileInfo.suffix().lower() == 'm3u':
                    self.playlist.load(url)
                else:
                    self.playlist.addMedia(QMediaContent(url))
            else:
                url = QUrl(name)
                if url.isValid():
                    self.playlist.addMedia(QMediaContent(url))

    def durationChanged(self, duration):
        duration /= 1000

        self.duration = duration
        self.slider.setMaximum(duration)

    def positionChanged(self, progress):
        progress /= 1000

        if not self.slider.isSliderDown():
            self.slider.setValue(progress)

        self.updateDurationInfo(progress)

    def metaDataChanged(self):
        if self.player.isMetaDataAvailable():
            self.setTrackInfo("%s - %s" % (
                    self.player.metaData(QMediaMetaData.AlbumArtist),
                    self.player.metaData(QMediaMetaData.Title)))

    def previousClicked(self):
        # Go to the previous track if we are within the first 5 seconds of
        # playback.  Otherwise, seek to the beginning.
        if self.player.position() <= 5000:
            self.playlist.previous()
        else:
            self.player.setPosition(0)

    def jump(self, index):
        if index.isValid():
            self.playlist.setCurrentIndex(index.row())
            self.player.play()

    def playlistPositionChanged(self, position):
        self.playlistView.setCurrentIndex(
                self.playlistModel.index(position, 0))

    def seek(self, seconds):
        self.player.setPosition(seconds * 1000)

    def statusChanged(self, status):
        self.handleCursor(status)

        if status == QMediaPlayer.LoadingMedia:
            self.setStatusInfo("Loading...")
        elif status == QMediaPlayer.StalledMedia:
            self.setStatusInfo("Media Stalled")
        elif status == QMediaPlayer.EndOfMedia:
            QApplication.alert(self)
        elif status == QMediaPlayer.InvalidMedia:
            self.displayErrorMessage()
        else:
            self.setStatusInfo("")

    def handleCursor(self, status):
        if status in (QMediaPlayer.LoadingMedia, QMediaPlayer.BufferingMedia, QMediaPlayer.StalledMedia):
            self.setCursor(Qt.BusyCursor)
        else:
            self.unsetCursor()

    def bufferingProgress(self, progress):
        self.setStatusInfo("Buffering %d%" % progress)

    def videoAvailableChanged(self, available):
        if available:
            self.fullScreenButton.clicked.connect(
                    self.videoWidget.setFullScreen)
            self.videoWidget.fullScreenChanged.connect(
                    self.fullScreenButton.setChecked)

            if self.fullScreenButton.isChecked():
                self.videoWidget.setFullScreen(True)
        else:
            self.fullScreenButton.clicked.disconnect(
                    self.videoWidget.setFullScreen)
            self.videoWidget.fullScreenChanged.disconnect(
                    self.fullScreenButton.setChecked)

            self.videoWidget.setFullScreen(False)

        self.colorButton.setEnabled(available)

    def setTrackInfo(self, info):
        self.trackInfo = info

        if self.statusInfo != "":
            self.setWindowTitle("%s | %s" % (self.trackInfo, self.statusInfo))
        else:
            self.setWindowTitle(self.trackInfo)

    def setStatusInfo(self, info):
        self.statusInfo = info

        if self.statusInfo != "":
            self.setWindowTitle("%s | %s" % (self.trackInfo, self.statusInfo))
        else:
            self.setWindowTitle(self.trackInfo)

    def displayErrorMessage(self):
        self.setStatusInfo(self.player.errorString())

    def updateDurationInfo(self, currentInfo):
        duration = self.duration
        if currentInfo or duration:
            currentTime = QTime((currentInfo/3600)%60, (currentInfo/60)%60,
                    currentInfo%60, (currentInfo*1000)%1000)
            totalTime = QTime((duration/3600)%60, (duration/60)%60,
                    duration%60, (duration*1000)%1000);

            format = 'hh:mm:ss' if duration > 3600 else 'mm:ss'
            tStr = currentTime.toString(format) + " / " + totalTime.toString(format)
        else:
            tStr = ""

        self.labelDuration.setText(tStr)

    def showColorDialog(self):
        if self.colorDialog is None:
            brightnessSlider = QSlider(Qt.Horizontal)
            brightnessSlider.setRange(-100, 100)
            brightnessSlider.setValue(self.videoWidget.brightness())
            brightnessSlider.sliderMoved.connect(
                    self.videoWidget.setBrightness)
            self.videoWidget.brightnessChanged.connect(
                    brightnessSlider.setValue)

            contrastSlider = QSlider(Qt.Horizontal)
            contrastSlider.setRange(-100, 100)
            contrastSlider.setValue(self.videoWidget.contrast())
            contrastSlider.sliderMoved.connect(self.videoWidget.setContrast)
            self.videoWidget.contrastChanged.connect(contrastSlider.setValue)

            hueSlider = QSlider(Qt.Horizontal)
            hueSlider.setRange(-100, 100)
            hueSlider.setValue(self.videoWidget.hue())
            hueSlider.sliderMoved.connect(self.videoWidget.setHue)
            self.videoWidget.hueChanged.connect(hueSlider.setValue)

            saturationSlider = QSlider(Qt.Horizontal)
            saturationSlider.setRange(-100, 100)
            saturationSlider.setValue(self.videoWidget.saturation())
            saturationSlider.sliderMoved.connect(
                    self.videoWidget.setSaturation)
            self.videoWidget.saturationChanged.connect(
                    saturationSlider.setValue)

            layout = QFormLayout()
            layout.addRow("Brightness", brightnessSlider)
            layout.addRow("Contrast", contrastSlider)
            layout.addRow("Hue", hueSlider)
            layout.addRow("Saturation", saturationSlider)

            button = QPushButton("Close")
            layout.addRow(button)

            self.colorDialog = QDialog(self)
            self.colorDialog.setWindowTitle("Color Options")
            self.colorDialog.setLayout(layout)

            button.clicked.connect(self.colorDialog.close)

        self.colorDialog.show()


if __name__ == '__main__':

    import sys

    app = QApplication(sys.argv)

    player = Player(sys.argv[1:])
    player.show()

    sys.exit(app.exec_())