我正在尝试使用线程并行运行具有其参数的视频 因此，当我单击SD按钮时，它会激活TP1和TP2按钮，并且每个按钮都有不同的网址。
我想显示视频并启动ProgressBar并在最后显示结果。
from multiprocessing import Process
import sys
import json
import shlex
import threading
import subprocess
import webbrowser
from QLed import QLed
from functools import partial
from PyQt5.QtGui import QColor,QFont
from PyQt5.QtGui import QIcon, QPixmap
from PyQt5.QtGui import QPainter, QPen
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QPainter, QColor, QPen
from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
from PyQt5.QtCore import QDir, Qt, QUrl, QSize, QPoint, QTimer
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QMainWindow
from PyQt5 import QtCore, QtGui, QtWidgets, QtMultimedia, QtMultimediaWidgets
from PyQt5.QtWidgets import (QWidget, QPushButton, QApplication,QGridLayout, QLCDNumber)
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout, QGridLayout, QLCDNumber
class Analyzer(QtCore.QObject):
result_ready = QtCore.pyqtSignal(object)
def do_work(self, myurl):
cmd = "ffprobe -v quiet -print_format json -show_streams"
args = shlex.split(cmd)
args.append(myurl)
ffprobeOutput = subprocess.check_output(args).decode('utf-8')
ffprobeOutput = json.loads(ffprobeOutput)
result = ffprobeOutput['streams'][0]
self.result_ready.emit(result)
class MainProg(QtWidgets.QMainWindow):
def __init__(self):
super(MainProg, self).__init__()
self.resize(870, 525)
self.centralwidget = QtWidgets.QWidget(self)
self.centralwidget.setObjectName("centralwidget")
############################ The Viedeo and frame ######
self.frame = QtWidgets.QFrame(self)
self.frame.setGeometry(QtCore.QRect(450, 40, 391, 291))
self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
self.mediaPlayer = QtMultimedia.QMediaPlayer(self.frame)
self.viewer1 = QtMultimediaWidgets.QVideoWidget(self.frame)
self.mediaPlayer.setVideoOutput(self.viewer1)
layout1 = QtWidgets.QGridLayout(self.frame)
layout1.addWidget(self.viewer1, 0, 0, 1, 2)
#############################################################
self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
self.progressBar.setGeometry(QtCore.QRect(110, 470, 143, 25))
self.progressBar.setProperty("value", 0)
self.progressBar.setTextVisible(True)
self.lcd = QtWidgets.QLCDNumber(self.centralwidget)
self.lcd.setGeometry(QtCore.QRect(220, 50, 146, 50))
self.lcd1 = QtWidgets.QLCDNumber(self.centralwidget)
self.lcd1.setGeometry(QtCore.QRect(220, 100, 146, 50))
self.lcd2 = QtWidgets.QLCDNumber(self.centralwidget)
self.lcd2.setGeometry(QtCore.QRect(220, 150, 146, 50))
self.lcd3 = QtWidgets.QLCDNumber(self.centralwidget)
self.lcd3.setGeometry(QtCore.QRect(220, 200, 146, 50))
self.lcd4 = QtWidgets.QLCDNumber(self.centralwidget)
self.lcd4.setGeometry(QtCore.QRect(220, 250, 146, 50))
self.lcd5 = QtWidgets.QLCDNumber(self.centralwidget)
self.lcd5.setGeometry(QtCore.QRect(220, 300, 146, 50))
self.lcd6 = QtWidgets.QLCDNumber(self.centralwidget)
self.lcd6.setGeometry(QtCore.QRect(220, 350, 146, 50))
self.txtt = QtWidgets.QLabel(self.centralwidget)
self.txtt.setFont(QFont('Arial', 12))
self.txtt.setGeometry(QtCore.QRect(20, 0, 300, 400))
self.txtt.setText("Video"
"\nCode Name .................."
"\n\nHorizont........................"
"\n\nVertical.........................."
"\n\nDisplay Aspect Ratio......"
"\n\nRefrence........................."
"\n\nB frames........................."
"\n\nStart Bits......................."
"\n\nSample Aspect ratio......."
"\n\nBit Rate.........................")
self.setCentralWidget(self.centralwidget)
self.statusbar = QtWidgets.QStatusBar(self)
self.statusbar.setObjectName("statusbar")
self.setStatusBar(self.statusbar)
#########################The buttons#################################
self.AASD = QtWidgets.QToolButton(self)
self.AASD.setGeometry(QtCore.QRect(140, 20, 31, 32))
self.AASD.setObjectName("AASD")
self.AASD.setText("SD")
self.AASD.clicked.connect(self.funcchoos)
QTimer.singleShot(5000, lambda: self.AASD.setDisabled(False))
self.Testpunk1 = QtWidgets.QToolButton(self)
self.Testpunk1.setGeometry(QtCore.QRect(150, 400, 31, 32))
self.Testpunk2 = QtWidgets.QToolButton(self)
self.Testpunk2.setGeometry(QtCore.QRect(150, 430, 31, 32))
self.Testpunk1.setText("TP1")
self.Testpunk2.setText("TP2")
self.Testpunk1.setObjectName("TP1")
self.Testpunk2.setObjectName("TP2")
self.Tp1 = QLed(self, onColour=QLed.Orange, shape=QLed.Circle)
self.Tp1.setGeometry(QtCore.QRect(185, 415, 25, 25))
self.Tp1.value = False
########################### the functions############################
def funcchoos (self):
QtCore.QTimer.singleShot(500, self.TPLed) # Using timer as QLed uses it in its tests
if self.sender().objectName() == "AASD":
self.Testpunk1.clicked.connect(self.MyUrl)
self.Testpunk2.clicked.connect(self.MyUrl)
return
def MyUrl(self):
TP1 = "293.168.1.6:1115"
TP2 = "239.168.1.7:1116"
if self.sender().objectName() == "TP1":
myurl = TP1
print("TP1 is playing")
self.dep3(myurl)
return
if self.sender().objectName() == "TP2":
myurl = TP2
self.dep3(myurl)
print(myurl)
print("TP2 is playing")
return
##############################################################
def TPLed(self):
self.Tp1.setValue(True) # the LED ON code
#########################################################################
def dep3(self,myurl):
# set progress bar to undetermined state and disable button
self.progressBar.setRange(0,0)
self.Testpunk1.setEnabled(False)
self.mediaPlayer.setMedia(QMediaContent(QUrl(myurl)))
self.mediaPlayer.play()
# create thread for doing heavy work
self.thread = QtCore.QThread()
self.worker = Analyzer()
self.worker.moveToThread(self.thread)
self.thread.started.connect(self.worker.do_work(myurl))
self.thread.finished.connect(self.worker.deleteLater)
self.worker.result_ready.connect(self.process_result)
self.worker.result_ready.connect(self.worker.do_work(myurl))
self.thread.start()
def process_result(self, result):
codec_name = result['codec_name']
width = result['width']
height = result['height']
display_aspect_ratio = result['display_aspect_ratio']
sample_aspect_ratio = result['sample_aspect_ratio']
refs = result['refs']
has_b_frames = result['has_b_frames']
self.lcd.display(has_b_frames)
self.lcd1.display(codec_name)
self.lcd2.display(width)
self.lcd3.display(height)
self.lcd4.display(display_aspect_ratio)
self.lcd5.display(sample_aspect_ratio)
self.lcd6.display(refs)
# reset progress bar and push button
self.progressBar.setRange(0,100)
self.progressBar.setValue(100)
self.pushButton.setEnabled(True)
print("done!!")
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
player = MainProg()
player.show()
sys.exit(app.exec_())
答案 0 :(得分：3)
主要问题是，当您使用时：
foo.signal.connect(function(args))
等于
value = function(args)
foo.signal.connect(value)
由于连接期望可调用而导致错误，在您的情况下，值为None会导致错误。
通常的解决方案是使用lambda或partials，但是第一个将导致该函数在主线程中执行，因为该函数在该线程中被调用，因此必须将其丢弃，而partials只添加参数。 >
foo.signal.connect(lambda *_, args=args : function(args))
foo.signal.connect(functools.partial(function, args))
此外，您还有其他错误，例如每次调用“ funcchoos”时，都会在“ TestpunkX”和MyUrl之间创建新的连接，从而导致每次按下“ TestpunkX”时，“ MyUrl”的调用次数与“ funcchoos被调用为“。
考虑到上述情况，我重写了您的代码，因为可能还有其他错误。
from functools import partial
import json
import shlex
import subprocess
import sys
from QLed import QLed
from PyQt5 import QtCore, QtGui, QtWidgets, QtMultimedia, QtMultimediaWidgets
class Analyzer(QtCore.QObject):
result_ready = QtCore.pyqtSignal(object)
@QtCore.pyqtSlot(str)
def do_work(self, myurl):
cmd = "ffprobe -v quiet -print_format json -show_streams"
args = shlex.split(cmd)
args.append(myurl)
ffprobeOutput = subprocess.check_output(args).decode("utf-8")
ffprobeOutput = json.loads(ffprobeOutput)
result = ffprobeOutput["streams"][0]
self.result_ready.emit(result)
class MainProg(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MainProg, self).__init__(parent)
self.setFont(QtGui.QFont("Arial", 12))
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
hlay = QtWidgets.QHBoxLayout(central_widget)
left_widget = QtWidgets.QWidget()
self.mediaPlayer = QtMultimedia.QMediaPlayer()
self.video_widget = QtMultimediaWidgets.QVideoWidget()
self.video_widget.setContentsMargins(30, 30, 30, 30)
self.mediaPlayer.setVideoOutput(self.video_widget)
self.sd_button = QtWidgets.QToolButton(text="SD", checkable=True)
self.sd_button.setFixedSize(31, 32)
self.code_lcd = QtWidgets.QLCDNumber()
self.horizontal_lcd = QtWidgets.QLCDNumber()
self.vertical_lcd = QtWidgets.QLCDNumber()
self.display_aspect_ratio_lcd = QtWidgets.QLCDNumber()
self.reference_lcd = QtWidgets.QLCDNumber()
self.b_frames_lcd = QtWidgets.QLCDNumber()
self.start_bits_lcd = QtWidgets.QLCDNumber()
self.sample_aspect_ratio_lcd = QtWidgets.QLCDNumber()
self.bit_rate_lcd = QtWidgets.QLCDNumber()
self.tp1_button = QtWidgets.QToolButton(text="TP1")
self.tp2_button = QtWidgets.QToolButton(text="TP2")
self.led = QLed(self, onColour=QLed.Orange, shape=QLed.Circle)
self.progressbar = QtWidgets.QProgressBar()
for lcd in (
self.code_lcd,
self.horizontal_lcd,
self.vertical_lcd,
self.display_aspect_ratio_lcd,
self.reference_lcd,
self.b_frames_lcd,
self.start_bits_lcd,
self.sample_aspect_ratio_lcd,
self.bit_rate_lcd,
):
lcd.setFixedSize(146, 50)
hlay.addWidget(left_widget)
hlay.addWidget(self.video_widget, stretch=1)
lay = QtWidgets.QGridLayout(left_widget)
lay.setVerticalSpacing(5)
for i, (text, widget) in enumerate(
zip(
(
"Video",
"Codec Name:",
"Horizontal:",
"Vertical:",
"Display Aspect Ratio:",
"Refrence:",
"B frames:",
"Start Bits:",
"Sample Aspect ratio:",
"Bit Rate:",
),
(
self.sd_button,
self.code_lcd,
self.horizontal_lcd,
self.vertical_lcd,
self.display_aspect_ratio_lcd,
self.reference_lcd,
self.b_frames_lcd,
self.start_bits_lcd,
self.sample_aspect_ratio_lcd,
self.bit_rate_lcd,
),
)
):
label = QtWidgets.QLabel(text)
lay.addWidget(label, i, 0)
lay.addWidget(widget, i, 1, alignment=QtCore.Qt.AlignCenter)
vlay = QtWidgets.QVBoxLayout()
vlay.addWidget(self.tp1_button)
vlay.addWidget(self.tp2_button)
hlay2 = QtWidgets.QHBoxLayout()
hlay2.addStretch(0)
hlay2.addLayout(vlay)
hlay2.addWidget(self.led)
hlay2.addStretch(0)
lay.addLayout(hlay2, lay.rowCount(), 0, 1, 2)
lay.addWidget(self.progressbar, lay.rowCount(), 0, 1, 2)
lay.setRowStretch(lay.rowCount(), 1)
self.resize(960, 480)
self.sd_button.toggled.connect(self.led.setValue)
self.tp1_button.clicked.connect(self.on_tp_clicked)
self.tp2_button.clicked.connect(self.on_tp_clicked)
self.current_button = None
thread = QtCore.QThread(self)
thread.start()
self.worker = Analyzer()
self.worker.moveToThread(thread)
self.worker.result_ready.connect(self.process_result)
@QtCore.pyqtSlot()
def on_tp_clicked(self):
if self.sd_button.isChecked():
urls_map = {
self.tp1_button: "293.168.1.6:1115",
self.tp2_button: "239.168.1.7:1116",
}
url = urls_map.get(self.sender(), "")
if url:
self.play(url)
self.current_button = self.sender()
self.current_button.setEnabled(False)
def play(self, url):
self.progressbar.setRange(0, 0)
self.mediaPlayer.setMedia(QtMultimedia.QMediaContent(QtCore.QUrl(url)))
self.mediaPlayer.play()
wrapper = partial(self.worker.do_work, url)
QtCore.QTimer.singleShot(0, wrapper)
@QtCore.pyqtSlot(object)
def process_result(self, result):
self.current_button.setEnabled(True)
self.current_button = None
self.progressbar.setRange(0, 1)
self.progressbar.setValue(0)
for lcd, key in zip(
(
self.code_lcd,
self.b_frames_lcd,
self.horizontal_lcd,
self.vertical_lcd,
self.display_aspect_ratio_lcd,
self.sample_aspect_ratio_lcd,
self.reference_lcd,
),
(
"codec_name",
"has_b_frames",
"width",
"height",
"display_aspect_ratio",
"sample_aspect_ratio",
"refs",
),
):
value = result.get(key, 0)
lcd.display(value)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainProg()
w.show()
sys.exit(app.exec_())
尽管我看不到需要使用线程，但是在这种情况下，使用QProcess会更容易。
from functools import partial
import json
import shlex
import sys
from QLed import QLed
from PyQt5 import QtCore, QtGui, QtWidgets, QtMultimedia, QtMultimediaWidgets
class MainProg(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MainProg, self).__init__(parent)
self.setFont(QtGui.QFont("Arial", 12))
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
hlay = QtWidgets.QHBoxLayout(central_widget)
left_widget = QtWidgets.QWidget()
self.mediaPlayer = QtMultimedia.QMediaPlayer()
self.video_widget = QtMultimediaWidgets.QVideoWidget()
self.video_widget.setContentsMargins(30, 30, 30, 30)
self.mediaPlayer.setVideoOutput(self.video_widget)
self.sd_button = QtWidgets.QToolButton(text="SD", checkable=True)
self.sd_button.setFixedSize(31, 32)
self.code_lcd = QtWidgets.QLCDNumber()
self.horizontal_lcd = QtWidgets.QLCDNumber()
self.vertical_lcd = QtWidgets.QLCDNumber()
self.display_aspect_ratio_lcd = QtWidgets.QLCDNumber()
self.reference_lcd = QtWidgets.QLCDNumber()
self.b_frames_lcd = QtWidgets.QLCDNumber()
self.start_bits_lcd = QtWidgets.QLCDNumber()
self.sample_aspect_ratio_lcd = QtWidgets.QLCDNumber()
self.bit_rate_lcd = QtWidgets.QLCDNumber()
self.tp1_button = QtWidgets.QToolButton(text="TP1")
self.tp2_button = QtWidgets.QToolButton(text="TP2")
self.led = QLed(self, onColour=QLed.Orange, shape=QLed.Circle)
self.progressbar = QtWidgets.QProgressBar()
for lcd in (
self.code_lcd,
self.horizontal_lcd,
self.vertical_lcd,
self.display_aspect_ratio_lcd,
self.reference_lcd,
self.b_frames_lcd,
self.start_bits_lcd,
self.sample_aspect_ratio_lcd,
self.bit_rate_lcd,
):
lcd.setFixedSize(146, 50)
hlay.addWidget(left_widget)
hlay.addWidget(self.video_widget, stretch=1)
lay = QtWidgets.QGridLayout(left_widget)
lay.setVerticalSpacing(5)
for i, (text, widget) in enumerate(
zip(
(
"Video",
"Codec Name:",
"Horizontal:",
"Vertical:",
"Display Aspect Ratio:",
"Refrence:",
"B frames:",
"Start Bits:",
"Sample Aspect ratio:",
"Bit Rate:",
),
(
self.sd_button,
self.code_lcd,
self.horizontal_lcd,
self.vertical_lcd,
self.display_aspect_ratio_lcd,
self.reference_lcd,
self.b_frames_lcd,
self.start_bits_lcd,
self.sample_aspect_ratio_lcd,
self.bit_rate_lcd,
),
)
):
label = QtWidgets.QLabel(text)
lay.addWidget(label, i, 0)
lay.addWidget(widget, i, 1, alignment=QtCore.Qt.AlignCenter)
vlay = QtWidgets.QVBoxLayout()
vlay.addWidget(self.tp1_button)
vlay.addWidget(self.tp2_button)
hlay2 = QtWidgets.QHBoxLayout()
hlay2.addStretch(0)
hlay2.addLayout(vlay)
hlay2.addWidget(self.led)
hlay2.addStretch(0)
lay.addLayout(hlay2, lay.rowCount(), 0, 1, 2)
lay.addWidget(self.progressbar, lay.rowCount(), 0, 1, 2)
lay.setRowStretch(lay.rowCount(), 1)
self.resize(960, 480)
self.sd_button.toggled.connect(self.led.setValue)
self.tp1_button.clicked.connect(self.on_tp_clicked)
self.tp2_button.clicked.connect(self.on_tp_clicked)
self.current_button = None
self.process = QtCore.QProcess(self)
self.process.finished.connect(self.on_finish)
@QtCore.pyqtSlot()
def on_tp_clicked(self):
if self.sd_button.isChecked():
urls_map = {
self.tp1_button: "293.168.1.6:1115",
self.tp2_button: "239.168.1.7:1116",
}
url = urls_map.get(self.sender(), "")
if url:
self.play(url)
self.current_button = self.sender()
self.current_button.setEnabled(False)
def play(self, url):
self.progressbar.setRange(0, 0)
self.mediaPlayer.setMedia(QtMultimedia.QMediaContent(QtCore.QUrl(url)))
self.mediaPlayer.play()
cmd = "ffprobe -v quiet -print_format json -show_streams"
program, *args = shlex.split(cmd)
args.append(url)
self.process.start(program, args)
@QtCore.pyqtSlot()
def on_finish(self):
data = self.process.readAllStandardOutput().data()
if data:
ffprobeOutput = json.loads(data)
result = ffprobeOutput['streams'][0]
for lcd, key in zip(
(
self.code_lcd,
self.b_frames_lcd,
self.horizontal_lcd,
self.vertical_lcd,
self.display_aspect_ratio_lcd,
self.sample_aspect_ratio_lcd,
self.reference_lcd,
),
(
"codec_name",
"has_b_frames",
"width",
"height",
"display_aspect_ratio",
"sample_aspect_ratio",
"refs",
),
):
value = result.get(key, 0)
lcd.display(value)
self.current_button.setEnabled(True)
self.current_button = None
self.progressbar.setRange(0, 1)
self.progressbar.setValue(0)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainProg()
w.show()
sys.exit(app.exec_())