pyqt5+opencv 实现读取视频数据的方法

1、opencv读取视频数据

import cv2if __name__ == '__main__':    videopath = "./datat/3700000000003_13-38-20.055.mp4"    namewindow = "detection window"  # 窗体名称    cv2.namedwindow(namewindow)  # 设置窗体    capture = cv2.videocapture(videopath)    if capture.isopened():        size = (capture.get(cv2.cap_prop_frame_width), capture.get(cv2.cap_prop_frame_height))  # 读取帧的宽、高        speed = capture.get(cv2.cap_prop_fps)  # 获得帧速        while true:            ret, frame = capture.read()            if ret:                frame = cv2.resize(frame, (960, 540))                cv2.imshow(namewindow, frame)                if cv2.waitkey(1) & 0xff == 27:                    break            el:                break        capture.relea()        cv2.destroyallwindows()    el:        print("摄像头或视频读取失败")

2、opencv集成pyqt5读取视频数据

import cv2import numpy as npimport sysfrom pyqt5.qtgui import *from pyqt5.qtcore import *from pyqt5.qtwidgets import *class video():    def __init__(lf, capture):        lf.capture = capture        lf.currentframe = np.array([])    def capturenextframe(lf):        ret, readframe = lf.capture.read()        if (ret == true):            lf.currentframe = cv2.resize(readframe, (960, 540))    def convertframe(lf):        try:            height, width, channel = lf.currentframe.shape            bytesperline = 3 * width      当演员      qimg = qimage(lf.currentframe.data, width, height, bytesperline,                               qimage.format_rgb888).rgbswapped()            qimg = qpixmap.fromimage(qimg)            return qimg        except:            return noneclass win(qmainwindow):    def __init__(lf, parent=none):        super().__init__()        lf.tgeometry(250, 80, 800, 600)  # 从屏幕(250，80)开始建立一个800*600的界面        lf.twindowtitle('camera')        lf.videopath = "./datat/3700000000003_13-38-20.055.mp4"        lf.video = video(cv2.videocapture(lf.videopath))        lf._timer = qtimer(lf)        lf._timer.timeout.connect(lf.play)        lf._timer.start(27)        lf.update()        lf.videoframe = qlabel('videocapture')        lf.videoframe.talignment(qt.aligncenter)        lf.tcentralwidget(lf.videoframe)          # 设置图像数据填充控件    def play(lf):            lf.video.capturenextframe()            lf.videoframe.tpixmap(lf.video.convertframe())            lf.videoframe.tscaledcontents(true)     # 设置图像自动填充控件        except typeerror:            print('no frame')if __name__ == '__main__':    app = qapplication(sys.argv)    win = win()    win.show()    sys.exit(app.exec_())

界面美化版：

import sysimport osimport cv2from pyqt5 import qtcore, qtgui, qtwidgetsfrom pyqt5.qtwidgets import *from pyqt5.qtcore import *from pyqt5.qtgui import qpalette, qbrush, qpixmapclass ui_mainwindow(qtwidgets.qwidget):    def __init__(lf, parent=none):        super(ui_mainwindow, lf).__init__(parent)        lf.timer_camera = qtcore.qtimer()  # 初始化定时器        lf.cap = cv2.videocapture()  # 初始化摄像头        lf.cam_num = r"d:\pycharmprojects\ele_good_pyqt5\datat
import sysimport osimport cv2from pyqt5 import qtcore, qtgui, qtwidgetsfrom pyqt5.qtwidgets import *from pyqt5.qtcore import *from pyqt5.qtgui import qpalette, qbrush, qpixmapclass ui_mainwindow(qtwidgets.qwidget):def __init__(lf, parent=none):super(ui_mainwindow, lf).__init__(parent)lf.timer_camera = qtcore.qtimer()  # 初始化定时器lf.cap = cv2.videocapture()  # 初始化摄像头lf.cam_num = r"d:\pycharmprojects\ele_good_pyqt5\datat\00.flv"lf.t_ui()lf.slot_init()lf.__flag_work = 0lf.x = 0lf.count = 0def t_ui(lf):lf.__layout_main = qtwidgets.qhboxlayout()  # 采用qhboxlayout类，按照从左到右的顺序来添加控件lf.__layout_fun_button = qtwidgets.qhboxlayout()lf.__layout_data_show = qtwidgets.qvboxlayout()  # qvboxlayout类垂直地摆放小部件lf.button_open_camera = qtwidgets.qpushbutton(u'打开相机')lf.button_clo = qtwidgets.qpushbutton(u'退出')# button颜色修改button_color = [lf.button_open_camera, lf.button_clo]for i in range(2):button_color[i].tstylesheet("qpushbutton{color:black}""qpushbutton:hover{color:red}""qpushbutton{background-color:rgb(78,255,255)}""qpushbutton{border:2px}""qpushbutton{border_radius:10px}""qpushbutton{padding:2px 4px}")lf.button_open_camera.tminimumheight(50)lf.button_clo.tminimumheight(50)# move()方法是移动窗口在屏幕上的位置到x = 500，y = 500的位置上lf.move(500, 500)# 信息显示lf.label_show_camera = qtwidgets.qlabel()lf.label_move = qtwidgets.qlabel()lf.label_move.tfixedsize(100, 100)lf.label_show_camera.tfixedsize(641, 481)lf.label_show_camera.tautofillbackground(fal)lf.__layout_fun_button.addwidget(lf.button_open_camera)lf.__layout_fun_button.addwidget(lf.button_clo)lf.__layout_fun_button.addwidget(lf.label_move)lf.__layout_main.addlayout(lf.__layout_fun_button)lf.__layout_main.addwidget(lf.label_show_camera)lf.tlayout(lf.__layout_main)lf.label_move.rai_()            # 设置控件在最上层lf.twindowtitle(u'摄像头')'''# 设置背景颜色palette1 = qpalette()palette1.tbrush(lf.backgroundrole(),qbrush(qpixmap('background.jpg')))lf.tpalette(palette1)def slot_init(lf):  # 建立通信连接lf.button_open_camera.clicked.connect(lf.button_open_camera_click)lf.timer_camera.timeout.connect(lf.show_camera)lf.button_clo.clicked.connect(lf.clo)def button_open_camera_click(lf):if lf.timer_camera.isactive() == fal:flag = lf.cap.open(lf.cam_num)      # 打开摄像头操作if flag == fal:msg = qtwidgets.qmessagebox.warning(lf, 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)# if msg==qtgui.qmessagebox.cancel:#                     pasl:lf.timer_camera.start(30)lf.button_open_camera.ttext(u'关闭相机')        # 将控件内容设置为关闭el:lf.timer_camera.stop()lf.cap.relea()lf.label_show_camera.clear()lf.button_open_camera.ttext(u'打开相机')def show_camera(lf):flag, lf.image = lf.cap.read()      # 读取摄像头数据show = cv2.resize(lf.image, (640, 480))show = cv2.cvtcolor(show, cv2.color_bgr2rgb)showimage = qtgui.qimage(show.data, show.shape[1], show.shape[0], qtgui.qimage.format_rgb888)lf.label_show_camera.tpixmap(qtgui.qpixmap.fromimage(showimage))def cloevent(lf, event):print("关闭")ok = qtwidgets.qpushbutton()cancel = qtwidgets.qpushbutton()msg = qtwidgets.qmessagebox(qtwidgets.qmessagebox.warning, u'关闭', u'是否关闭！')msg.addbutton(ok, qtwidgets.qmessagebox.actionrole)msg.addbutton(cancel, qtwidgets.qmessagebox.rejectrole)ok.ttext(u'确定')cancel.ttext(u'取消')if msg.exec_() == qtwidgets.qmessagebox.rejectrole:event.ignore()if lf.cap.isopened():lf.cap.relea()if lf.timer_camera.isactive():lf.timer_camera.stop()event.accept()if __name__ == '__main__':app = qapplication(sys.argv)win = ui_mainwindow()win.show()sys.exit(app.exec_())
.flv"        lf.t_ui()        lf.slot_init()    清远大学    lf.__flag_work = 0        lf.x = 0        lf.count = 0    def t_ui(lf):        lf.__layout_main = qtwidgets.qhboxlayout()  # 采用qhboxlayout类，按照从左到右的顺序来添加控件        lf.__layout_fun_button = qtwidgets.qhboxlayout()        lf.__layout_data_show = qtwidgets.qvboxlayout()  # qvboxlayout类垂直地摆放小部件        lf.button_open_camera = qtwidgets.qpushbutton(u'打开相机')        lf.button_clo = qtwidgets.qpushbutton(u'退出')        # button颜色修改        button_color = [lf.button_open_camera, lf.button_clo]        for i in range(2):            button_color[i].tstylesheet("qpushbutton{color:black}"                                           "qpushbutton:hover{color:red}"                                           "qpushbutton{background-color:rgb(78,255,255)}"                                           "qpushbutton{border:2px}"       年轻的小蛦子4                                    "qpushbutton{border_radius:10px}"                                           "qpushbutton{padding:2px 4px}")        lf.button_open_camera.tminimumheight(50)        lf.button_clo.tminimumheight(50)        # move()方法是移动窗口在屏幕上的位置到x = 500，y = 500的位置上        lf.move(500, 500)        # 信息显示        lf.label_show_camera = qtwidgets.qlabel()        lf.label_move = qtwidgets.qlabel()        lf.label_move.tfixedsize(100, 100)        lf.label_show_camera.tfixedsize(641, 481)        lf.label_show_camera.tautofillbackground(fal)        lf.__layout_fun_button.addwidget(lf.button_open_camera)        lf.__layout_fun_button.addwidget(lf.button_clo)        lf.__layout_fun_button.addwidget(lf.label_move)        lf.__layout_main.addlayout(lf.__layout_fun_button)        lf.__layout_main.addwidget(lf.label_show_camera)        lf.tlayout(lf.__layout_main)        lf.label_move.rai_()            # 设置控件在最上层        lf.twindowtitle(u'摄像头')        '''        # 设置背景颜色        palette1 = qpalette()        palette1.tbrush(lf.backgroundrole(),qbrush(qpixmap('background.jpg')))        lf.tpalette(palette1)    def slot_init(lf):  # 建立通信连接        lf.button_open_camera.clicked.connect(lf.button_open_camera_click)        lf.timer_camera.timeout.connect(lf.show_camera)        lf.button_clo.clicked.connect(lf.clo)    def button_open_camera_click(lf):        if lf.timer_camera.isactive() == fal:            flag = lf.cap.open(lf.cam_num)      # 打开摄像头操作            if flag == fal:                msg = qtwidgets.qmessagebox.warning(lf, 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)                # if msg==qtgui.qmessagebox.cancel:                #                     pass       美国高二留学     el:                lf.timer_camera.start(30)                lf.button_open_camera.ttext(u'关闭相机')        # 将控件内容设置为关闭        el:            lf.timer_camera.stop()            lf.cap.relea()            lf.label_show_camera.clear()            lf.button_open_camera.ttext(u'打开相机')    def show_camera(lf):        flag, lf.image = lf.cap.read()      # 读取摄像头数据        show = cv2.resize(lf.image, (640, 480))        show = cv2.cvtcolor(show, cv2.color_bgr2rgb)        showimage = qtgui.qimage(show.data, show.shape[1], show.shape[0], qtgui.qimage.format_rgb888)        lf.label_show_camera.tpixmap(qtgui.qpixmap.fromimage(showimage))    def cloevent(lf, event):        print("关闭")        ok = qtwidgets.qpushbutton()        cancel = qtwidgets.qpushbutton()        msg = qtwidgets.qmessagebox(qtwidgets.qmessagebox.warning, u'关闭', u'是否关闭！')        msg.addbutton(ok, qtwidgets.qmessagebox.actionrole)        msg.addbutton(cancel, qtwidgets.qmessagebox.rejectrole)        ok.ttext(u'确定')        cancel.ttext(u'取消')        if msg.exec_() == qtwidgets.qmessagebox.rejectrole:            even回去吧t.ignore()            if lf.cap.isopened():                lf.cap.relea()            if lf.timer_camera.isactive():                lf.timer_camera.stop()            event.accept()if __name__ == '__main__':    app = qapplication(sys.argv)    win = ui_mainwindow()    win.show()    sys.exit(app.exec_())

显示效果如下所示：

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