Pyqt4 如何更新QtGui.QSlider'；视频播放时，s的位置？
我目前正在使用PyQt4开发视频播放器GUI，并使用QtGui.QSlider控制视频流的进度。我想知道在播放视频时如何更改滑块的值Pyqt4 如何更新QtGui.QSlider'；视频播放时，s的位置？,pyqt4,phonon,Pyqt4,Phonon,我目前正在使用PyQt4开发视频播放器GUI，并使用QtGui.QSlider控制视频流的进度。我想知道在播放视频时如何更改滑块的值 import sys, os import xml.etree.ElementTree as ET from xml.dom import minidom from PyQt4 import QtCore, QtGui, uic from PyQt4.phonon import Phonon class vidplayer(QtGui.QWidget): d
import sys, os
import xml.etree.ElementTree as ET
from xml.dom import minidom
from PyQt4 import QtCore, QtGui, uic
from PyQt4.phonon import Phonon
class vidplayer(QtGui.QWidget):
def __init__(self,url,xml_url,parent = None):
self.url = url
super(vidplayer,self).__init__()
self.initUI()
self.getElm_from_XML(xml_url);
def printXMLInfo(self):
itemlist = self.doc.getElementsByTagName('object')
for item in itemlist:
print ("frame-span:"+str(item.attributes['framespan'].value)+
" Event tag: "+ str(item.attributes['name'].value));
print(len(itemlist))
def getElm_from_XML(self,xml_url):
self.doc = minidom.parse(xml_url)
self.clipList = self.doc.getElementsByTagName('object');
print("Reading XML done...\n Have read %s elements.\n" %(len(self.clipList)))
def initUI(self):
## create widgets
# phonon video player and media
self.vp = Phonon.VideoPlayer()
media = Phonon.MediaSource(self.url)
# layout components (boxes)
self.vbox_play = QtGui.QVBoxLayout()
self.hbox_ctrl_vid = QtGui.QHBoxLayout()
self.hbox_ctrl_dec = QtGui.QHBoxLayout()
self.hbox = QtGui.QHBoxLayout()
self.vbox_control = QtGui.QVBoxLayout()
# bottons to control
self.btn_go_prev = QtGui.QPushButton("|<")
self.btn_go_next = QtGui.QPushButton(">|")
self.btn_play = QtGui.QPushButton("Play(Pause)")
self.btn_accept = QtGui.QPushButton("Accept")
self.btn_reject = QtGui.QPushButton("Reject")
# slider to interact with videoplayer
self.sld = QtGui.QSlider(QtCore.Qt.Horizontal,self)
#self.sld = Phonon.SeekSlider(self)
## layout components setup
self.vbox_control.addStretch(1)
self.hbox_ctrl_vid.addStretch(1)
self.hbox_ctrl_dec.addStretch(1)
self.vbox_play.addStretch(1)
self.hbox.addStretch(1)
self.vbox_control.setDirection(QtGui.QBoxLayout.BottomToTop)
self.vbox_play.setDirection(QtGui.QBoxLayout.BottomToTop)
## widgets inits
self.vp.load(media)
self.vp.play()
self.sld.setFocusPolicy(QtCore.Qt.NoFocus)
self.sld.setRange(1,1000)
## widgets assignment
self.hbox_ctrl_vid.addWidget(self.btn_go_prev)
self.hbox_ctrl_vid.addWidget(self.btn_play)
self.hbox_ctrl_vid.addWidget(self.btn_go_next)
self.hbox_ctrl_dec.addWidget(self.btn_accept)
self.hbox_ctrl_dec.addWidget(self.btn_reject)
self.vbox_play.addWidget(self.vp)
self.vbox_play.addWidget(self.sld)
self.vbox_control.addLayout(self.hbox_ctrl_dec)
self.vbox_control.addLayout(self.hbox_ctrl_vid)
self.hbox.addLayout(self.vbox_play)
self.hbox.addLayout(self.vbox_control)
## main setup and display
self.setLayout(self.hbox)
self.setGeometry(300,300,600,400)
self.setWindowTitle('CCNY_SRI TRECVid iSED UI')
self.setWindowIcon(QtGui.QIcon('./icon.png'))
self.show()
## connection set up
self.sld.valueChanged[int].connect(self.sld_changeValue)
self.vp.finished.connect(self.onReachingFinish)
self.btn_play.clicked.connect(self.onClicked_play)
self.btn_go_next.clicked.connect(self.onClicked_nextClip)
self.btn_go_prev.clicked.connect(self.onClicked_prevClip)
###################### callable functions ##################
def sld_changeValue(self,value):
totalT = self.vp.totalTime()
print totalT
newT = totalT*value/1000
self.vp.seek(newT)
def onClicked_play(self):
# BUG: sth wrong with boundary
if self.vp.isPaused():
self.vp.play()
print("resume play")
elif self.vp.isPlaying():
self.vp.pause()
print("pause at",self.sld.value())
elif self.sld.value()<1000:
self.vp.play()
def onClicked_nextClip(self):
print("go next")
def onClicked_prevClip(self):
print("go prev")
def onClicked_acc(self):
print("accepted")
def onClicked_rej(self):
print("rejected")
def onReachingFinish(self):
self.vp.pause()
self.vp.stop()
def main():
app = QtGui.QApplication(sys.argv)
window = vidplayer(sys.argv[1],sys.argv[2])
sys.exit(app.exec_())
if __name__ == '__main__':
main()
elif self.sld.value（）声子中有一个专门的类：
Phonon.SeekSliderclass MainWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
# creating player resource
self.player = Player()
# adding controls
self.sliders = Sliders(self.player)
class Sliders(QtGui.QWidget):
def __init__(self, player):
QtGui.QWidget.__init__(self)
self.seek_slider = Phonon.SeekSlider(player , self)
class Player(Phonon.MediaObject):
def __init__(self):
Phonon.MediaObject.__init__(self)
self.audioOutput = Phonon.AudioOutput(Phonon.MusicCategory, self)
self.path = Phonon.createPath(self, self.audioOutput)
valueChanged