import sys import cv2 from showPic import Ui_MainWindow from PyQt5 import QtGui from PyQt5.QtCore import * from PyQt5.QtGui import * from PyQt5.QtWidgets import * class videoShow(QMainWindow,Ui_MainWindow): def __init__(self): super().__init__() self.setupUi(self) @pyqtSlot() def on_pushButton_record_clicked(self): camera_path = 0 # 0：自带摄像头 1：外接摄像头 "xxx.mp4" "rtsp://admin:[email protected]/cam/..." capture = cv2.VideoCapture(camera_path) # 初始化播放器 流媒体 fourcc = cv2.VideoWriter_fourcc('M', 'P', '4', 'V') # XVID/DIVX MPEG MJPG X264 video_writer = cv2.VideoWriter("image/myself.mp4", fourcc, 25, (960, 540)) # 存放路径、、帧率fps、尺寸（且保证下面的frame也是这个尺寸） while True: flag, frame = capture.read() if flag is False: continue frame = cv2.resize(frame, (960, 540)) video_writer.write(frame) cv2.imshow("video", frame) key = cv2.waitKey(25) if key == 27: video_writer.release() break if __name__ == '__main__': app = QApplication(sys.argv) ui = videoShow() ui.show() sys.exit(app.exec_())在这样代码的基础上添加点击按钮播放已经录制好的视频

您可以在`videoShow`类中添加一个点击按钮播放已经录制好的视频的槽函数，然后在UI文件中添加一个按钮，并将其与该槽函数关联。以下是修改后的代码示例： ```python import sys import cv2 from showPic import Ui_MainWindow from PyQt5 import QtGui from PyQt5.QtCore import * from PyQt5.QtGui import * from PyQt5.QtWidgets import * class videoShow(QMainWindow,Ui_MainWindow): def __init__(self): super().__init__() self.setupUi(self) @pyqtSlot() def on_pushButton_record_clicked(self): camera_path = 0 # 0：自带摄像头 1：外接摄像头 "xxx.mp4" "rtsp://admin:[email protected]/cam/..." capture = cv2.VideoCapture(camera_path) # 初始化播放器 流媒体 fourcc = cv2.VideoWriter_fourcc('M', 'P', '4', 'V') # XVID/DIVX MPEG MJPG X264 video_writer = cv2.VideoWriter("image/myself.mp4", fourcc, 25, (960, 540)) # 存放路径、、帧率fps、尺寸（且保证下面的frame也是这个尺寸） while True: flag, frame = capture.read() if flag is False: continue frame = cv2.resize(frame, (960, 540)) video_writer.write(frame) cv2.imshow("video", frame) key = cv2.waitKey(25) if key == 27: video_writer.release() break @pyqtSlot() def on_pushButton_play_clicked(self): video_path = "image/myself.mp4" # 已经录制好的视频路径 capture = cv2.VideoCapture(video_path) # 初始化播放器 while True: flag, frame = capture.read() if flag is False: break cv2.imshow("video", frame) key = cv2.waitKey(25) if key == 27: break capture.release() if __name__ == '__main__': app = QApplication(sys.argv) ui = videoShow() ui.show() sys.exit(app.exec_()) ``` 在修改后的代码中，我们添加了一个名为`on_pushButton_play_clicked`的槽函数，并在该函数中使用`cv2.VideoCapture`打开已经录制好的视频，并通过`cv2.imshow`显示每一帧。您需要在UI文件中添加一个名为`pushButton_play`的按钮，并将其与该槽函数关联。当您点击该按钮时，录制好的视频将会开始播放。