OpenCV Video Capture with PyQt4

Question

I have been trying to capture video using PyQt4 GUI and OpenCV. I created some buttons like \"Start\", \"End\" etc to control the capturing. Starting is fine, but I can\'t s

Answer 1

The answer above is great, but for for a beginner like me it's hard to see where the part 'in Window' should go and how much of the original code should remain. Here is the full working code based on the information above:

import cv2
from PyQt4 import QtGui, QtCore


class Capture():
    def __init__(self):
        self.capturing = False
        self.c = cv2.VideoCapture(0)

    def startCapture(self):
        print "pressed start"
        self.capturing = True
        cap = self.c
        while(self.capturing):
            ret, frame = cap.read()
            cv2.imshow("Capture", frame)
            cv2.waitKey(5)
        cv2.destroyAllWindows()

    def endCapture(self):
        print "pressed End"
        self.capturing = False

    def quitCapture(self):
        print "pressed Quit"
        cap = self.c
        cv2.destroyAllWindows()
        cap.release()
        QtCore.QCoreApplication.quit()


class Window(QtGui.QWidget):
    def __init__(self):

        QtGui.QWidget.__init__(self)
        self.setWindowTitle('Control Panel')

        self.capture = Capture()
        self.start_button = QtGui.QPushButton('Start',self)
        self.start_button.clicked.connect(self.capture.startCapture)

        self.end_button = QtGui.QPushButton('End',self)
        self.end_button.clicked.connect(self.capture.endCapture)

        self.quit_button = QtGui.QPushButton('Quit',self)
        self.quit_button.clicked.connect(self.capture.quitCapture)

        vbox = QtGui.QVBoxLayout(self)
        vbox.addWidget(self.start_button)
        vbox.addWidget(self.end_button)
        vbox.addWidget(self.quit_button)

        self.setLayout(vbox)
        self.setGeometry(100,100,200,200)
        self.show()


if __name__ == '__main__':
    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window()
    sys.exit(app.exec_())

Answer 2

class Capture():
    def __init__(self):
        self.capturing = False
        self.c = cv2.VideoCapture(0)

    def startCapture(self):
        print "pressed start"
        self.capturing = True
        cap = self.c
        while(self.capturing):
            ret, frame = cap.read()
            cv2.imshow("Capture", frame)
            cv2.waitKey(5)
        cv2.destroyAllWindows()

    def endCapture(self):
        print "pressed End"
        self.capturing = False
        # cv2.destroyAllWindows()

    def quitCapture(self):
        print "pressed Quit"
        cap = self.c
        cv2.destroyAllWindows()
        cap.release()
        QtCore.QCoreApplication.quit()

in Window:

self.capture = Capture()
self.start_button = QtGui.QPushButton('Start',self)
self.start_button.clicked.connect(self.capture.startCapture)

self.end_button = QtGui.QPushButton('End',self)
self.end_button.clicked.connect(self.capture.endCapture)

self.quit_button = QtGui.QPushButton('Quit',self)
self.quit_button.clicked.connect(self.capture.quitCapture)