我想从指定的编号开始播放视频，并且正在使用功能import sys
from PyQt5 import QtCore, QtWidgets, QtGui, QtPrintSupport
import time
import os
from PyQt5.QtGui import QIcon, QPixmap, QImage
path = "C:/Users/benni/Desktop/"
folder_name = "exit_folder_test"
name_list = "used_names.txt"
source = "test"
extension = "jpg"
if not os.path.isfile(os.path.join(path, name_list)):
used_names = open(path + name_list, "w+")
used_names.close()
names =[]
else:
used_names = open(path + name_list, "r")
names = used_names.readlines()
used_names.close()
print(names)
#####################################################################################
class MainWindow(QtWidgets.QMainWindow):
switch_window = QtCore.pyqtSignal(str)
def __init__(self):
super(MainWindow, self).__init__()
widget = QtWidgets.QWidget()
self.setCentralWidget(widget)
grid_layout = QtWidgets.QGridLayout(widget)
rows, cols = 2, 3
self._labels = []
global image_width, image_height, number, pictures
image_width, image_height, number = 600, 400, 0
pictures = []
for row in range(rows):
for col in range(cols):
label = QtWidgets.QLabel(alignment=QtCore.Qt.AlignCenter)
label.setFixedSize(image_width, image_height)
grid_layout.addWidget(label, row, col)
self._labels.append(label)
self.ComboBox = QtWidgets.QComboBox(self)
grid_layout.addWidget(self.ComboBox, 3, 2, alignment=QtCore.Qt.AlignRight)
self.ComboBox.setFixedSize(125,25)
self.refresh_button = QtWidgets.QPushButton("aktuallisieren")
grid_layout.addWidget(self.refresh_button, 3, 1)
self.refresh_button.setFixedSize(125,25)
self.refresh_button.clicked[bool].connect(self.update)
self.print_button = QtWidgets.QPushButton("print") # print button
grid_layout.addWidget(self.print_button, 3, 3)
self.print_button.setFixedSize(75,25)
self.print_button.clicked[bool].connect(self.print)
self.resize(1920, 1080)
def update(self):
global number, pictures
for file in os.listdir(os.path.join(path, source)): # add all files with ".jpg" to the list pictures
if file.endswith(".{}".format(extension)):
pictures.append(file)
if len(pictures) > 0:
for picture_name in pictures:
number += 1
if 0 < number < 7:
time.sleep(1) # wait until the picture is transferred
picture_new_name = "image{}.{}".format(number, extension)
os.rename(
os.path.join(path, source, picture_name),
os.path.join(path, folder_name, picture_new_name),
) # renames all the given pictures and transfer them in a new folder
print(number)
time.sleep(0.2)
label = self._labels[number-1]
pixmap = QtGui.QPixmap(os.path.join(path, folder_name, "image{}.{}".format(number, extension))).scaled(image_width, image_height)
label.setPixmap(pixmap)
self.ComboBox.addItem("image{}.{}".format(number, extension))
del pictures[:]
def print(self):
printer = QtPrintSupport.QPrinter()
printer.setCopyCount(1)
painter = QtGui.QPainter()
painter.begin(printer)
image = self.ComboBox.currentText()
print(path + folder_name +"/"+ image)
screen = QtGui.QImage(path + folder_name +"/"+ image)
painter.drawImage(QtCore.QRect(0, 0, 700, 500), screen)
# End painting
painter.end()
self.switch_window.emit()
###########################################################################
class WindowTwo(QtWidgets.QWidget):
switch_window = QtCore.pyqtSignal()
def __init__(self):
QtWidgets.QWidget.__init__(self)
self.setWindowTitle('Window Two')
layout = QtWidgets.QGridLayout()
self.label = QtWidgets.QLabel("please wait")
layout.addWidget(self.label,1,2, alignment=QtCore.Qt.AlignCenter)
self.finish_button = QtWidgets.QPushButton('OK')
self.finish_button.clicked.connect(self.close)
self.finish_button.setFixedSize(75,23)
layout.addWidget(self.finish_button, 3,3, alignment=QtCore.Qt.AlignBottom)
self.setLayout(layout)
self.resize(1920, 1080)
###########################################################################
class Login(QtWidgets.QWidget):
switch_window = QtCore.pyqtSignal()
def __init__(self):
QtWidgets.QWidget.__init__(self)
self.setWindowTitle('Fotobox')
self.resize(1920,1080)
layout = QtWidgets.QGridLayout()
self.Button = QtWidgets.QPushButton('Weiter')
self.Button.setFixedSize(75,23)
layout.addWidget(self.Button, 3,3, alignment=QtCore.Qt.AlignRight)
self.Button.clicked.connect(self.on_click)
self.label = QtWidgets.QLabel("Name: ")
self.label.setFixedSize(120,51)
layout.addWidget(self.label, 1,1, alignment=QtCore.Qt.AlignRight)
self.error_label = QtWidgets.QLabel("") # the label where the error is shown
self.error_label.setFixedSize(120,51)
layout.addWidget(self.error_label, 2,2)
self.lineEdit = QtWidgets.QLineEdit() # input label for the name of the person/group
self.lineEdit.setFixedSize(260,31)
layout.addWidget(self.lineEdit, 1,2)
font2 = self.lineEdit.font()
font2.setPointSize(17)
self.lineEdit.setFont(font2)
self.lineEdit.textChanged.connect(self.issue_test)
self.setLayout(layout)
def issue_test(self): # tests if the name is used before
self.issue = False
name = self.lineEdit.text() # reads input label
for i in names:
if name == i or name+"\n" == i: # if name is already used before: red & bg yellow + issue -> True
self.lineEdit.setStyleSheet("color: red; background-color: yellow;")
self.error_label.setText("Name bereits Vorhanden! \n Bitte Eingabe ändern.")
self.error_label.setStyleSheet("color: red;")
self.issue = True
if self.issue == False: # when no problem exists the error message disapearse and the input label is white
self.lineEdit.setStyleSheet("color: black; background-color: white;")
self.issue = False
self.error_label.setText("")
def on_click(self): # when user click the button to confirm the input
global folder_name
name = self.lineEdit.text()
if name == "": # tests if the input label is empty
self.lineEdit.setStyleSheet("color: red; background-color: yellow;")
self.error_label.setText(" Keine Eingabe! \n Bitte Eingabe ändern.")
self.error_label.setStyleSheet("color: red;")
self.issue = True
if self.issue == False: # only when input is not empty and not used before
folder_name = name
os.mkdir(path + folder_name) # creates a folder for the user
names.append(folder_name) # add the name to the list of the used names
used_names = open(path + name_list, "a")
used_names.write(name + "\n")
used_names.close()
self.switch_window.emit() # switch to the mainwindow
##############################################################################
class Controller:
def __init__(self):
pass
def show_login(self):
self.login = Login()
self.login.switch_window.connect(self.show_main)
self.login.show()
def show_main(self):
self.window = MainWindow()
self.window.switch_window.connect(self.show_window_two)
self.login.close()
self.window.show()
def show_window_two(self):
self.window_two = WindowTwo()
self.window.close()
self.window_two.show()
def main():
app = QtWidgets.QApplication(sys.argv)
controller = Controller()
controller.show_login()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
设置帧号，但是它不起作用。
cv2.VideoCapture.set(cv2.CAP_PROP_POS_FRAMES, x)这里我要从cap2.set（cv2.CAP_PROP_POS_FRAMES，count）函数中的count开始播放视频。 但这会提高播放avi视频的速度，但不会从指定的计数帧开始播放视频