本节我们使用pythonQT进行实验。
首先python环境为3.5，请自行百度。
安装python3QT5，如遇到pip3错误，请自行百度。
1. 隔离环境创建
virtualenv --python=python3.5 --no-site-packages Py3QT5_ENV
2. python3-qt5.12.3安装
pip3 download pyqt5
pip3 install PyQt5-5.12.3-5.12.4-cp35.cp36.cp37.cp38-abi3-manylinux1_x86_64.whl
pip3 install PyQt5_sip-4.19.17-cp35-cp35m-manylinux1_x86_64.whl
3. qtdesigner安装：
sudo apt-get install qt5-default qttools5-dev-tools
下面为代码，运行直接python就可以。
下面代码有几个bug，请大家帮忙解决一下。
1、保存的视频只有一帧，不能报错小视频。
2、在保存视频或照片时，想弹出一个保存路径可以任意保存路径及重新命名。
目前2实现了可以弹出框，但不能正确保存照片或视频。
import sys
import os
import cv2
import numpy as np
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import QPalette, QBrush, QPixmap
class Ui_MainWindow(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Ui_MainWindow, self).__init__(parent)
self.timer_camera = QtCore.QTimer() # 初始化打开摄像头定时器
self.timer_video = QtCore.QTimer() # 初始化录视频定时器
self.cap = cv2.VideoCapture() # 初始化摄像头
self.CAM_NUM = 0
self.set_ui()
self.slot_init()
self.__flag_work = 0
self.x = 0
self.count = 0
self.vout_1 = 0
def set_ui(self):
self.__layout_main = QtWidgets.QHBoxLayout() # 采用QHBoxLayout类，按照从左到右的顺序来添加控件
self.__layout_fun_button = QtWidgets.QHBoxLayout()
self.__layout_data_show = QtWidgets.QVBoxLayout() # QVBoxLayout类垂直地摆放小部件
self.button_open_camera = QtWidgets.QPushButton(u'打开')
self.button_close = QtWidgets.QPushButton(u'退出')
self.button_video = QtWidgets.QPushButton(u'视频')
self.button_picture = QtWidgets.QPushButton(u'拍照')
# button颜色修改
button_color = [self.button_open_camera, self.button_close, self.button_video, self.button_picture]
for i in range(4):
button_color[i].setStyleSheet("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}")
# button高度
self.button_open_camera.setMinimumHeight(50)
self.button_close.setMinimumHeight(50)
self.button_video.setMinimumHeight(50)
self.button_picture.setMinimumHeight(50)
#self.button_video.setMinimumWidth(10)
#self.button_picture.setMinimumWidth(10)
# move()方法是移动窗口在屏幕上的位置到x = 500，y = 500的位置上
self.move(500, 500)
# 信息显示
self.label_show_camera = QtWidgets.QLabel()
self.label_move = QtWidgets.QLabel()
self.label_move.setFixedSize(100, 100)
self.label_show_camera.setFixedSize(641, 481)
self.label_show_camera.setAutoFillBackground(False)
self.__layout_fun_button.addWidget(self.button_open_camera)
self.__layout_fun_button.addWidget(self.button_close)
self.__layout_fun_button.addWidget(self.button_video)
self.__layout_fun_button.addWidget(self.button_picture)
self.__layout_fun_button.addWidget(self.label_move)
self.__layout_main.addLayout(self.__layout_fun_button)
self.__layout_main.addWidget(self.label_show_camera)
self.setLayout(self.__layout_main)
self.label_move.raise_()
self.setWindowTitle(u'摄像头')
'''
# 设置背景颜色
palette1 = QPalette()
palette1.setBrush(self.backgroundRole(),QBrush(QPixmap('background.jpg')))
self.setPalette(palette1)
'''
def slot_init(self): # 建立通信连接
self.button_open_camera.clicked.connect(self.button_open_camera_click)
self.timer_camera.timeout.connect(self.show_camera) #打开摄像头按钮超时
self.timer_video.timeout.connect(self.video_camera) #录视频按钮超时
self.button_video.clicked.connect(self.button_video_click)
self.button_picture.clicked.connect(self.button_picture_click)
self.button_close.clicked.connect(self.close)
def button_open_camera_click(self): #打开摄像头按钮
if self.timer_camera.isActive() == False:
flag = self.cap.open(self.CAM_NUM) #open摄像头
if flag == False:
msg = QtWidgets.QMessageBox.Warning(self, 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
else:
self.timer_camera.start(30)
self.button_open_camera.setText(u'关闭')
else:
self.timer_camera.stop()
self.cap.release()
self.label_show_camera.clear()
self.button_open_camera.setText(u'打开')
def button_video_click(self): #录视频按钮
flag1, self.image1 = self.cap.read()
#获得帧的宽高
#sz = (int(self.image.get(cv2.CAP_PROP_FRAME_WIDTH)),int(self.image.get(cv2.CAP_PROP_FRAME_HEIGHT)))
#fourcc = cv2.VideoWriter_fourcc('m', 'p', '4', 'v')
fourcc = cv2.VideoWriter_fourcc('X', 'V', 'I', 'D')
self.vout_1 = cv2.VideoWriter('out.avi', fourcc, 30.0, (640,480))
if self.timer_video.isActive() == False:
if flag1 == False:
msg = QtWidgets.QMessageBox.Warning(self, 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
else:
self.timer_video.start(30)
fourcc = cv2.VideoWriter_fourcc('X', 'V', 'I', 'D')
self.vout_1 = cv2.VideoWriter('out.avi', fourcc, 30.0, (640,480))
self.button_video.setText(u'结束')
else:
self.timer_video.stop()
#self.label_show_camera.clear()
self.vout_1.release()
self.button_video.setText(u'视频')
def video_camera(self): # 写入视频
#flag, self.image = self.cap.read()
#cv2.imshow("capture",self.image)
self.vout_1.write(self.image)
cv2.waitKey(10)
print("1111")
def button_picture_click(self): # 拍照按钮
#flag, self.image = self.cap.read()
# 调用存储文件dialog
fileName, tmp = QFileDialog.getSaveFileName(self, 'Save Image', 'Image', '*.png *.jpg *.bmp')
#if fileName is '':
# return
#if self.image.size == 1:
# return
# 调用OpenCV写入函数
#cv2.imwrite(fileName, self.image)
cv2.imwrite("aaa.jpg", self.image)
def show_camera(self): # 摄像头展示
flag, self.image = self.cap.read()
show = cv2.resize(self.image, (640, 480)) # 放大缩小
show = cv2.cvtColor(show, cv2.COLOR_BGR2RGB)
showImage = QtGui.QImage(show.data, show.shape[1], show.shape[0], QtGui.QImage.Format_RGB888)
self.label_show_camera.setPixmap(QtGui.QPixmap.fromImage(showImage))
def closeEvent(self, event): # 关闭按钮
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.setText(u'确定')
cancel.setText(u'取消')
if msg.exec_() == QtWidgets.QMessageBox.RejectRole:
event.ignore()
else:
if self.cap.isOpened():
self.cap.release()
if self.timer_camera.isActive():
self.timer_camera.stop()
event.accept()
if __name__ == '__main__':
App = QApplication(sys.argv)
win = Ui_MainWindow()
win.show()
sys.exit(App.exec_())
