pyqt5图片和视频浏览器

from PyQt5.QtWidgets import QFileDialog, QWidget from PyQt5.QtGui import QImage, QPixmap from PyQt5.QtWidgets import QMessageBox from PyQt5.QtCore import QThread, pyqtSignal, Qt from browser_ui import Ui_Form import cv2 import time class Browser(QWidget): # 初始化 def __init__(self, parent=None): super(Browser, self).__init__(parent) self.ui = Ui_Form() self.ui.setupUi(self) self.ui.pb_browser.clicked.connect(self.slot_open_browser) self.ui.pb_open.clicked.connect(self.slot_openfile) # 打开文件浏览器槽函数 def slot_open_browser(self): # 打开文件浏览器，获得选择的文件 file_name = QFileDialog.getOpenFileName(self, '选择文件', '', 'Images (*.png *.xpm *.jpg *.avi *.mp4)') # print(file_name) # 判断是否选择了文件 if file_name[0] != '': # print('open') # 显示文件名 self.ui.lineEdit.setText(file_name[0]) # 显示文件内容 # with open(file_name[0], 'r') as f: # my_txt = f.read() # self.lineEdit.setPlainText(my_txt) # 打开文件槽函数 def slot_openfile(self): # 获取文件名 file_name = self.ui.lineEdit.text() if file_name == '': QMessageBox.information(self, 'empty error', '请选择文件') return temp = file_name.split('.')[-1] if temp == 'avi' or temp == 'mp4': self.th = Thread(file_name, self) self.th.show_signal.connect(self.show_image) self.th.start() # 如果th不不定义为类属性，需要下面这两句，程序运行播放视频才不会出错 # self.image = QImage(file_name) # self.ui.lb_show.setPixmap(QPixmap.fromImage(self.image)) return # img = cv2.imread(file_name) # cv2.imshow('photo', img) # 把图像转换为QT格式 self.image = QImage(file_name) self.ui.lb_show.setPixmap(QPixmap.fromImage(self.image)) def show_image(self, image): # 在label上显示图片 self.ui.lb_show.setPixmap(QPixmap.fromImage(image)) # 缩放窗 # self.resize(self.image.width(), self.image.height()) # 采用线程来播放视频 class Thread(QThread): # 自定义信号 show_signal = pyqtSignal(QImage) # 构造函数，接受参数 def __init__(self, file_name, browser): QThread.__init__(self) self.video_name = file_name self.browser = browser # 重写run()方法 def run(self): # 实例化一个读取视频对象 cap = cv2.VideoCapture(self.video_name) while cap.isOpened(): # 读取视频帧 ret, frame = cap.read() # 获取视频的帧数 fps = cap.get(cv2.CAP_PROP_FPS) if ret: # 转换图片格式 rgb_image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB) qt_image = QImage(rgb_image.data, rgb_image.shape[1], rgb_image.shape[0], QImage.Format_RGB888) p = qt_image.scaled(640, 480, Qt.KeepAspectRatio) # 发射信号 print('线程: %s' % hex(int(QThread.currentThreadId()))) self.show_signal.emit(p) time.sleep(1/fps) else: image = QImage('E:/11.jpg') self.browser.ui.lb_show.setPixmap(QPixmap.fromImage(image)) self.browser.ui.lb_show.adjustSize() print('播放结束') break