python+opencv+pyqt视频显示不出来，单张可以，一循环就不行了，附完整代码

Question

import sys
from sys import argv,exit
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QPixmap
from PyQt5.QtCore import Qt
import time
import cv2
import numpy as np
import Camera

class MainCode(QMainWindow,Camera.Ui_MainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        Camera.Ui_MainWindow.__init__(self)
        self.setupUi(self)
        #定时器
        self.timer_camera = QtCore.QTimer()
        #准备获取图像
        self.cap = cv2.VideoCapture()
        self.CAM_NUM = 0
        self.pushButton_open.clicked.connect(self.button_open_camera_click)
        self.pushButton_close.clicked.connect(self.closeEvent)
        self.pushButton_take_2.clicked.connect(self.takePhoto_2)

    def button_open_camera_click(self):
        
        if self.timer_camera.isActive() == False:
            flag = self.cap.open(self.CAM_NUM, cv2.CAP_DSHOW)
            if flag == False:
                msg = QtWidgets.QMessageBox.warning(
                    self, u"Warning", u"请检测相机与电脑是否连接正确",
                    buttons=QtWidgets.QMessageBox.Ok,
                    defaultButton=QtWidgets.QMessageBox.Ok)
            else:
                self.timer_camera.start(30)

    def takePhoto_2(self):
        if self.timer_camera.isActive() != False:
            while True:
                flag,  frame = self.cap.read()
                show = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
                showImage = QtGui.QImage(show.data, show.shape[1], show.shape[0], QtGui.QImage.Format_RGB888)
                self.label_face_6.setPixmap(QtGui.QPixmap.fromImage(showImage))
                self.label_face_6.setScaledContents(True)                

if __name__ == '__main__':
    app = QApplication(sys.argv)
    md=MainCode()
    md.show()
    sys.exit(app.exec_())

Camera.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'Camera1.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.setWindowModality(QtCore.Qt.NonModal)
        MainWindow.resize(765, 645)
        MainWindow.setMinimumSize(QtCore.QSize(765, 645))
        MainWindow.setMaximumSize(QtCore.QSize(16777215, 16777215))
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap(":/newPrefix/pic/pai.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        MainWindow.setWindowIcon(icon)
        MainWindow.setToolTip("")
        MainWindow.setAutoFillBackground(False)
        MainWindow.setTabShape(QtWidgets.QTabWidget.Rounded)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton_open = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_open.setGeometry(QtCore.QRect(90, 380, 120, 40))
        self.pushButton_open.setMinimumSize(QtCore.QSize(100, 40))
        self.pushButton_open.setMaximumSize(QtCore.QSize(120, 40))
        font = QtGui.QFont()
        font.setFamily("华文彩云")
        font.setPointSize(12)
        self.pushButton_open.setFont(font)
        icon1 = QtGui.QIcon()
        icon1.addPixmap(QtGui.QPixmap(":/newPrefix/pic/g1.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.pushButton_open.setIcon(icon1)
        self.pushButton_open.setObjectName("pushButton_open")
        self.pushButton_take_2 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_take_2.setGeometry(QtCore.QRect(270, 380, 100, 40))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.pushButton_take_2.sizePolicy().hasHeightForWidth())
        self.pushButton_take_2.setSizePolicy(sizePolicy)
        self.pushButton_take_2.setMinimumSize(QtCore.QSize(100, 40))
        self.pushButton_take_2.setMaximumSize(QtCore.QSize(100, 40))
        font = QtGui.QFont()
        font.setFamily("华文彩云")
        font.setPointSize(12)
        self.pushButton_take_2.setFont(font)
        self.pushButton_take_2.setText("")
        self.pushButton_take_2.setIcon(icon)
        self.pushButton_take_2.setObjectName("pushButton_take_2")
        self.label_face_6 = QtWidgets.QLabel(self.centralwidget)
        self.label_face_6.setGeometry(QtCore.QRect(20, 60, 431, 300))
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_face_6.sizePolicy().hasHeightForWidth())
        self.label_face_6.setSizePolicy(sizePolicy)
        self.label_face_6.setMinimumSize(QtCore.QSize(0, 0))
        self.label_face_6.setMaximumSize(QtCore.QSize(500, 300))
        font = QtGui.QFont()
        font.setFamily("楷体")
        font.setPointSize(16)
        self.label_face_6.setFont(font)
        self.label_face_6.setLayoutDirection(QtCore.Qt.LeftToRight)
        self.label_face_6.setStyleSheet("background-color: rgb(192, 218, 255);")
        self.label_face_6.setAlignment(QtCore.Qt.AlignCenter)
        self.label_face_6.setObjectName("label_face_6")
        MainWindow.setCentralWidget(self.centralwidget)
        self.actionGoogle_Translate = QtWidgets.QAction(MainWindow)
        self.actionGoogle_Translate.setObjectName("actionGoogle_Translate")
        self.actionHTML_type = QtWidgets.QAction(MainWindow)
        self.actionHTML_type.setObjectName("actionHTML_type")
        self.actionsoftware_version = QtWidgets.QAction(MainWindow)
        self.actionsoftware_version.setObjectName("actionsoftware_version")

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "铝皮除胶（窝牛）"))
        self.pushButton_open.setToolTip(_translate("MainWindow", "点击打开摄像头"))
        self.pushButton_open.setText(_translate("MainWindow", "打开摄像头"))
        self.pushButton_take_2.setToolTip(_translate("MainWindow", "点击拍照"))
        self.label_face_6.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><br/></p></body></html>"))
        self.actionGoogle_Translate.setText(_translate("MainWindow", "Google Translate"))
        self.actionHTML_type.setText(_translate("MainWindow", "HTML type"))
        self.actionsoftware_version.setText(_translate("MainWindow", "software version"))

import icon_rc

Answer 1

你想做一个视频播放器？还是什么？

这样的视频播放器吗？