PyQt+cv实现视频播放

1.代码：

import cv2
import sys
from PyQt5.QtGui import QImage, QPixmap
from PyQt5.QtWidgets import QApplication, QMainWindow
from opentest import Ui_MainWindow


class VideoPlayer(QMainWindow, Ui_MainWindow):
    def __init__(self):
        super(VideoPlayer, self).__init__()

        # self.cap = cv2.VideoCapture('D:/video/Sample.mp4')
        self.cap = cv2.VideoCapture(0)
        self.setupUi(self)
        self.btn_open.clicked.connect(self.show_video)

    def show_video(self):
        while 1:
            flag, img = self.cap.read()
            # CV的图像是BGR格式的，而PyQt图像格式是RGB格式的，二者需要转换
            img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
            img = QImage(img.data, img.shape[1], img.shape[0], QImage.Format_RGB888)
            self.lab_disp.setPixmap(QPixmap.fromImage(img))
            self.lab_disp.show()  # 刷新界面
            cv2.waitKey(int(1000 / 24))  # 休眠1000 / 24秒，确保帧率


if __name__ == "__main__":
    app = QApplication(sys.argv)
    form = VideoPlayer()
    form.show()
    sys.exit(app.exec_())

2.运行：