PyQt的视频完美，可实现实时、本地、暂停、继续、停止等功能，且无卡退、程序崩溃等情况

2023-10-11 04:22| 来源: 网络整理| 查看: 265

使用pyqt来读取本地视频和实时视频 1.首先使用创建ui文件，样式如下

组成： lable：显示视频 Open：打开文件或者摄像头并且显示，Close为取消 lable：显示文件 GrouBox：为了保证多个QRadioButton只选中一个，（注：我继承的的是c#还要java的思想，这里边到底需不需要这个控件我也没试）

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先保存为DisplayUI.ui文件然后再转成 DisplayUI.py文件 # -*- coding: utf-8 -*- # Form implementation generated from reading ui file 'DisplayUI.ui' # # Created by: PyQt5 UI code generator 5.14.2 # # 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.resize(800, 600) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName("centralwidget") self.DispalyLabel = QtWidgets.QLabel(self.centralwidget) self.DispalyLabel.setGeometry(QtCore.QRect(0, 0, 681, 451)) self.DispalyLabel.setText("") self.DispalyLabel.setObjectName("DispalyLabel") self.groupBox = QtWidgets.QGroupBox(self.centralwidget) self.groupBox.setGeometry(QtCore.QRect(60, 460, 120, 80)) self.groupBox.setObjectName("groupBox") self.radioButtonCam = QtWidgets.QRadioButton(self.groupBox) self.radioButtonCam.setGeometry(QtCore.QRect(10, 20, 89, 17)) self.radioButtonCam.setObjectName("radioButtonCam") self.radioButtonFile = QtWidgets.QRadioButton(self.groupBox) self.radioButtonFile.setGeometry(QtCore.QRect(10, 40, 89, 17)) self.radioButtonFile.setCheckable(True) self.radioButtonFile.setChecked(True) self.radioButtonFile.setObjectName("radioButtonFile") self.Open = QtWidgets.QPushButton(self.centralwidget) self.Open.setGeometry(QtCore.QRect(220, 490, 75, 21)) self.Open.setObjectName("Open") self.Close = QtWidgets.QPushButton(self.centralwidget) self.Close.setGeometry(QtCore.QRect(380, 490, 75, 23)) self.Close.setObjectName("Close") self.First= QtWidgets.QPushButton(self.centralwidget) self.First.setGeometry(QtCore.QRect(500, 490, 75, 23)) self.First.setObjectName("First") MainWindow.setCentralWidget(self.centralwidget) self.menubar = QtWidgets.QMenuBar(MainWindow) self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22)) self.menubar.setObjectName("menubar") MainWindow.setMenuBar(self.menubar) self.statusbar = QtWidgets.QStatusBar(MainWindow) self.statusbar.setObjectName("statusbar") MainWindow.setStatusBar(self.statusbar) self.retranslateUi(MainWindow) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) self.groupBox.setTitle(_translate("MainWindow", "GroupBox")) self.radioButtonCam.setText(_translate("MainWindow", "摄像模式")) self.radioButtonFile.setText(_translate("MainWindow", "本地文件模式")) self.Open.setText(_translate("MainWindow", "Open")) self.Close.setText(_translate("MainWindow", "Close")) self.First.setText(_translate("MainWindow", "暂停||继续")) 2.功能事件

写一个VideoDisplay.py文件，用来生成各个控件的事件和槽，，以及创建线程，注明：内部代码逻辑已经改好，，实现了暂停和继续的功能，还有就是解决了视频播放完毕程序各个按钮事件失灵的问题，以及再开启摄像头的模式下再点击本地文件模式会崩溃的问题。。好了，大概就这么多。下面上萤火（硬货）。

#!/usr/bin/env python # -*- coding: utf-8 -*- # @Time : 2020/4/27 19:40 # @Author : 沐白 # @Site : # @File : VideoDisplay.py # @Software: PyCharm import cv2 import threading from PyQt5.QtCore import QFile from PyQt5.QtWidgets import QFileDialog, QMessageBox from PyQt5.QtGui import QImage, QPixmap import time import os class Display: def __init__(self, ui, mainWnd): self.ui = ui self.mainWnd = mainWnd # 默认视频源为相机 self.ui.radioButtonCam.setChecked(True) self.isCamera = True self.a = 0 self.b=0 # 信号槽设置 ui.Open.clicked.connect(self.Open) ui.Close.clicked.connect(self.Close) ui.radioButtonCam.clicked.connect(self.radioButtonCam) ui.radioButtonFile.clicked.connect(self.radioButtonFile) ui.First.clicked.connect(self.suspend_continue) # 创建一个关闭事件并设为未触发 self.continueEvent1 = threading.Event() self.continueEvent1.clear() self.stopEvent = threading.Event() self.stopEvent.clear() def radioButtonCam(self): if self.a==0: self.isCamera = True def suspend_continue(self): self.continueEvent1.set() def radioButtonFile(self): if self.a==0: self.isCamera = False # def pause(self): # self.__flag.clear() # 设置为False, 让线程阻塞 # print("pause") # # def resume(self): # self.__flag.set() # 设置为True, 让线程停止阻塞 # print("resume") def Open(self): self.fileName="" if not self.isCamera: self.fileName, self.fileType = QFileDialog.getOpenFileName(self.mainWnd, 'Choose file', '',"MP4Files(*.mp4);;AVI Files(*.avi)" ) self.cap = cv2.VideoCapture(self.fileName) self.frameRate = self.cap.get(cv2.CAP_PROP_FPS) else: # 下面两种rtsp格式都是支持的 # cap = cv2.VideoCapture("rtsp://admin:[email protected]/main/Channels/1") self.a=1 self.cap = cv2.VideoCapture(0) # 创建视频显示线程 if (self.fileName != "") or(self.a==1) : th = threading.Thread(target=self.Display) th.start() def Close(self): # 关闭事件设为触发，关闭视频播放 self.a = 0 self.stopEvent.set() def Display(self): self.ui.Open.setEnabled(False) self.ui.Close.setEnabled(True) self.ui.First.setEnabled(True) while self.cap.isOpened() and True: success, frame = self.cap.read() # RGB转BGR print(success) if success==False: print("play finished") # 判断本地文件播放完毕 break frame = cv2.cvtColor(frame, cv2.COLOR_RGB2BGR) img = QImage(frame.data, frame.shape[1], frame.shape[0], QImage.Format_RGB888) self.ui.DispalyLabel.setPixmap(QPixmap.fromImage(img)) if self.isCamera: cv2.waitKey(1) else: cv2.waitKey(int(1000 / self.frameRate)) # 判断关闭事件是否已触发 if True==self.continueEvent1.is_set(): self.continueEvent1.clear() self.b=1 while self.b==1: if True == self.continueEvent1.is_set(): self.continueEvent1.clear() self.b=0 if True == self.stopEvent.is_set(): # 关闭事件置为未触发，清空显示label break self.cap.release() self.stopEvent.clear() self.ui.DispalyLabel.clear() self.ui.Close.setEnabled(False) self.ui.Open.setEnabled(True) self.ui.DispalyLabel.setText("1212") 3.生成主函数

至于有人问为什么不把这三个文件写在一起？？？答案是：能写在一起，但是你想想一个文件划分为每个功能不更好用吗，最重要的不会吧自己绕迷糊，

#!/usr/bin/env python # -*- coding: utf-8 -*- # @Time : 2020/4/26 19:36 # @Author : 沐白 # @Site : # @File : Main.py # @Software: PyCharm # import sys # from PyQt5.QtWidgets import QApplication, QMainWindow # import asa # # # # # if __name__ == '__main__': # app = QApplication(sys.argv) # MainWindow = QMainWindow() # ui = asa.Ui_MainWindow() # ui.setupUi(MainWindow) # MainWindow.show() # sys.exit(app.exec_()) import sys import DisplayUI from PyQt5.QtWidgets import QApplication, QMainWindow from VideoDisplay import Display if __name__ == '__main__': app = QApplication(sys.argv) mainWnd = QMainWindow() ui = DisplayUI.Ui_MainWindow() # 可以理解成将创建的 ui 绑定到新建的 mainWnd 上 ui.setupUi(mainWnd) display = Display(ui, mainWnd) mainWnd.show() sys.exit(app.exec_())

最后呢希望大家收藏走起一波，后续会有pyqt，tensorflow，爬虫，python基础的各个模块，，更重要的是我都改bug改到0：34了，，大家给按排一波》》》

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