我正在尝试检索x的值，即是ShowVideo类的计数器，并在ImageViewer类的按钮中显示该计数器。视频运行完美，但是我不了解如何在视频开始运行时显示计数器的逻辑。所有功能应同时工作，此处i作为变量是startVideo()类下的内部函数showVideo中声明的计数器名称。我想更新按钮button_in(class ImageViewer, method InitUI())上的值作为计数器。
'''
import cv2
import numpy as np
import sys
from PyQt5 import QtCore
from PyQt5 import QtWidgets
from PyQt5 import QtGui
from PyQt5.QtCore import pyqtSignal,QRect,QThread
from PyQt5.QtWidgets import *
from PyQt5.QtGui import QPixmap
filenameOpen =0
class ShowVideo(QtCore.QObject):# its only running a videooo
camera = cv2.VideoCapture(filenameOpen)
VideoSignal = QtCore.pyqtSignal(QtGui.QImage)
#############################################
# newValue=QtCore.pyqtSignal(int)
# stopped= pyqtSignal()
#################################################
def __init__(self, parent = None):
# super(ShowVideo, self).__init__(parent)
super().__init__()
@QtCore.pyqtSlot()
def startVideo(self):
run_video = True
# self.counterThread.startVideo()QImage
x=0
while run_video:
# ret, image = self.camera.read()
ret, image = self.camera.read()
height, width, channels = image.shape
frame=image.copy()
frameClone = frame.copy()
# frame = cv2.resize(frame, (1920, 1080))
color_swapped_image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
height, width, _ = color_swapped_image.shape
qt_image = QtGui.QImage(color_swapped_image.data,
width,
height,
color_swapped_image.strides[0],
QtGui.QImage.Format_RGB888)
self.VideoSignal.emit(qt_image)
# return x
# print(x)
# x=x+1
class ImageViewer(QtWidgets.QMainWindow):
def __init__(self, parent = None):
super().__init__()
left=0
top=0
width=1920
height=1080
iconName="icon.png"
self.setWindowIcon(QtGui.QIcon(iconName))
self.setGeometry(left,top,width,height)
self.image = QtGui.QImage()
self.initUI()
self.show()
def initUI(self):
self.setWindowTitle('Emotion Analysis')
button_video = QPushButton(self)
button_file = QPushButton(self)
button_play = QPushButton(self)
self.button_in=QPushButton(self)
button_out=QPushButton(self)
button_total=QPushButton(self)
self.button_stop = QPushButton(self)
self.label_image=QLabel(self)
label_image_blank=QLabel(self)
label_in=QLabel(self)
label_out=QLabel(self)
label_total=QLabel(self)
# button definations>>>>>>>>>>>>>>>>>>>>
button_video.setGeometry((QRect(10,30,90,65)))# syntax(x,y,<>,^)
button_video.setIcon(QtGui.QIcon("securitycamera.png"))
button_video.setIconSize(QtCore.QSize(50,50))
# button.setToolTip("This is Click Me Button")
button_video.setToolTip("<h4>Live Stream<h4>")
button_video.clicked.connect(vid.startVideo)
button_file.setGeometry((QRect(110,30,90,65)))# syntax(x,y,<>,^)
button_file.setIcon(QtGui.QIcon("file.png"))
button_file.setIconSize(QtCore.QSize(50,50))
button_file.setToolTip("<h4>Add new connection<h4>")
button_file.clicked.connect(QtWidgets.qApp.quit) # this line is also working condition, the quit() method is defined above
button_play.setGeometry((QRect(1710,30,90,65)))# syntax(x,y,<>,^)
# button_play.setGeometry((QRect(1710,300,90,65)))# syntax(x,y,<>,^)
button_play.setIcon(QtGui.QIcon("play_red.png"))
button_play.setIconSize(QtCore.QSize(50,50))
button_play.setToolTip("<h4>Play video<h4>")
button_play.clicked.connect(vid.startVideo)
self.button_stop.setGeometry((QRect(1820,30,90,65)))# syntax(x,y,<>,^)
self.button_stop.setIcon(QtGui.QIcon("stop.png"))
self.button_stop.setIconSize(QtCore.QSize(50,50))
self.button_stop.setToolTip("<h4>Stop Video<h4>")
self.button_stop.clicked.connect(QApplication.instance().quit)
#############################################################
self.button_in.setGeometry((QRect(1710,500,90,45)))# syntax(x,y,<>,^)
self.button_in.setText("0")# it should be updated while counter runs
# self.button_in.setText(x)
self.button_in.setFont(QtGui.QFont("Sanserif",20))
# self.counterThread=QThread()
# self.counter=ShowVideo()
# self.counter.moveToThread(self.counterThread)
# self.button_in.clicked.connect(self.startCounting)
# self.vid.newValue.connect(self.button_in.setText)
# self.counterThread.started.connect(self.counter.startVideo)
#####################################################################
button_out.setGeometry((QRect(1710,550,90,45)))# syntax(x,y,<>,^)
button_out.setText("0")
button_out.setFont(QtGui.QFont("Sanserif",20))
button_total.setGeometry((QRect(1710,600,90,45)))# syntax(x,y,<>,^)
button_total.setText("0")
button_total.setFont(QtGui.QFont("Sanserif",20))
# label definations>>>>>>>>>>>>>>>>>>>>
self.label_image.setGeometry((QRect(10,110,1500,900))) # syntax(x,y,<>,^)
self.label_image.setPixmap(QPixmap("black.jpg"))
self.label_image.setScaledContents(True)
label_in.setGeometry((QRect(1600,500,100,50))) # syntax(x,y,<>,^)
label_in.setText("In")
label_in.setFont(QtGui.QFont("Sanserif",20))
label_out.setGeometry((QRect(1600,550,100,50))) # syntax(x,y,<>,^)
label_out.setText("Out")
label_out.setFont(QtGui.QFont("Sanserif",20))
label_total.setGeometry((QRect(1600,600,100,50))) # syntax(x,y,<>,^)
label_total.setText("Total")
label_total.setFont(QtGui.QFont("Sanserif",20))
@QtCore.pyqtSlot(QtGui.QImage)
def setImage(self, image):
self.label_image.setPixmap(QPixmap.fromImage(image))
# self.vid.newValue.connect(self.button_in.setText)
# @QtCore.pyqtSlot(int)
# def startCounting(self,x):
# # # if not self.counterThread.isRunning():
# # # self.counterThread.startVideo()
# # # pass
# self.vid.newValue.connect(self.button_in.setText)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
thread = QtCore.QThread() #thread declareation
thread.start()
vid = ShowVideo() # calling 1st class
vid.moveToThread(thread)
image_viewer = ImageViewer() #calling second class
vid.VideoSignal.connect(image_viewer.setImage)
# vid.VideoSignal.connect(image_viewer.startCounting)
sys.exit(app.exec_()) '''
答案 0 :(得分：1)
最简单的方法可能是在ShowVideo.VideoSignal中发射ShowVideo.startVedio并将vid.VideoSignal连接到image_viewer.setText时，即在图像中同时发射图像的帧号。
class ShowVideo(QtCore.QObject):
VideoSignal = QtCore.pyqtSignal(QtGui.QImage, int)
....
@QtCore.pyqtSlot()
def startVideo(self):
....
x += 1
self.VideoSignal.emit(qt_image, x)
....
if __name__ == '__main__':
....
vid.VideoSignal.connect(lambda img, frame: image_viewer.button_in.setText(str(frame)) )