Python实现录屏功能的示例代码

一、界面开发

#设置主界面
def set_init_window(self):
 # 去掉tkinter默认的标题
 self.tk.title('')
 # 隐藏默认图标
 self.tk.iconbitmap(self.icon_path())
 #获取屏幕的宽度
 screeWidth = self.tk.winfo_screenwidth()
 #获取屏幕高度
 screeHeight = self.tk.winfo_screenheight()
 
 width = int((screeWidth - 500) / 2)
 height = int((screeHeight - 300) / 2)
 # 设置主界面的大小和默认位置
 self.tk.geometry(f'500x100+{width}+{height}')
 
 #添加开始录制按钮,点击之后开启两个线程:一个录屏、一个监听键盘
 btn1 = tkinter.Button(self.tk, width=5, height=1, text='开始',
 command=lambda:[threading.Thread(target=self.video_record).start(),threading.Thread(target=self.start_listen).start()])
 btn1.pack()
 # 设置按钮位置
 btn1.place(x=110, y=50, anchor='n')
 
 #开启新线程设置录屏范围
 btn2 = tkinter.Button(self.tk, width=15, height=1, text='设置录制区域', command=lambda:threading.Thread(target=self.set_range).start())
 btn2.pack()
 btn2.place(x=230, y=50, anchor='n')


#生成透明的icon图标
def icon_path(self):
 ICON = (b'\x00\x00\x01\x00\x01\x00\x10\x10\x00\x00\x01\x00\x08\x00h\x05\x00\x00'
 b'\x16\x00\x00\x00(\x00\x00\x00\x10\x00\x00\x00 \x00\x00\x00\x01\x00'
 b'\x08\x00\x00\x00\x00\x00@\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
 b'\x00\x01\x00\x00\x00\x01') + b'\x00' * 1282 + b'\xff' * 64
 _, ICON_PATH = tempfile.mkstemp()
 with open(ICON_PATH, 'wb') as icon_file:
 icon_file.write(ICON)
 return ICON_PATH

二、录屏参数设置

1.设置录屏范围

#设置录屏范围
def set_range(self):
 #self.init_window.withdraw() #隐藏窗口
 self.tk.state('icon')#窗口最小化
 screeWidth = self.tk.winfo_screenwidth()
 screeHeight = self.tk.winfo_screenheight()

 self.newFrame = tkinter.Toplevel(self.tk,width=screeWidth,height=screeHeight,bg='white')#开启新窗口
 self.newFrame.attributes('-transparentcolor', 'white') # 使白色为透明色
 self.newFrame.overrideredirect(True) # 隐藏导航栏

 self.canvas = tkinter.Canvas(self.newFrame,bg='white',bd=0,width=screeWidth,height=screeHeight)
 self.canvas.bind('<Button-1>', self.onLeftButtonDown)#按下左键
 self.canvas.bind('<B1-Motion>', self.onLeftButtonMove)#移动鼠标
 self.canvas.bind('<ButtonRelease-1>', self.onLeftButtonUp)#抬起左键
 self.canvas.pack(fill=tkinter.BOTH, expand=tkinter.YES)

 time.sleep(0.3)
 im = ImageGrab.grab()
 # 暂存全屏截图
 im.save('temp.png')
 im.close()
 self.image = tkinter.PhotoImage(file='temp.png')
 os.remove('temp.png')
 self.canvas.create_image(screeWidth//2, screeHeight//2, image=self.image)

2.鼠标事件监听

#按下鼠标
def onLeftButtonDown(self,event):
 try:
 self.canvas.delete(self.lastDraw)
 self.canvas.delete(self.dot1)
 self.canvas.delete(self.dot2)
 self.btn3.destroy()
 except Exception as e:
 pass

 self.X = event.x
 self.Y = event.y
 self.X2 = 0
 self.Y2 = 0

#移动鼠标
def onLeftButtonMove(self,event):
 try: # 删除刚画完的图形,不然所有画的框都会出现
 self.canvas.delete(self.lastDraw)
 self.canvas.delete(self.dot1)
 self.canvas.delete(self.dot2)
 self.btn3.destroy()
 except Exception as e:
 pass

 self.X2 = event.x
 self.Y2 = event.y
 self.lastDraw = self.canvas.create_rectangle(self.X, self.Y, event.x, event.y,width=2, outline='pink')

#松开鼠标
def onLeftButtonUp(self,event):
 print("起点", self.X, self.Y)
 print("终点", self.X2, self.Y2)

 if self.X2==0 and self.X2==0:
 return

 self.width, self.high = self.X2-self.X,self.Y2-self.Y
 self.region = (self.X, self.Y, self.X2, self.Y2)

 self.dot1=self.canvas.create_text(self.X, self.Y - 10, text=f'({self.X},{self.Y})', font=("Purisa", 12), fill="pink")
 self.dot2=self.canvas.create_text(self.X2, self.Y2 + 10, text=f'({self.X2},{self.Y2})', font=("Purisa", 12), fill="pink")

 # self.newFrame.destroy()#销毁窗口
 # self.init_window.deiconify()#显示窗口
 # self.tk.state('normal') # 取消窗口最小化

 self.btn3 = tkinter.Button(self.canvas, width=15, height=1, text='确定录制区域',bg='pink',fg='#64854c',command=lambda:[self.newFrame.destroy(),self.tk.state('normal')])
 self.btn3.pack()
 self.btn3.place(x=self.X2-20, y=self.Y2+20, anchor='n')

3.键盘事件监听

# 开始监听
def start_listen(self):
 with keyboard.Listener(on_press=self.on_press) as listener:
 listener.join()
 # 监听按键
def on_press(self,key):
 if key == keyboard.Key.esc:
 self.flag = True # 改变
 return False # 返回False,键盘监听结束!

三、录屏操作

def video_record(self):
 fourcc = cv2.VideoWriter_fourcc('X', 'V', 'I', 'D')
 out = cv2.VideoWriter('output.mp4', fourcc, 14, (self.width, self.high)) # 参数分别为 输出文件名,解码方式,帧数,录像范围
 self.count = 1
 while (True):
 img = ImageGrab.grab(self.region) #指定截取坐标(左边X,上边Y,右边X,下边Y)
 img_np = numpy.array(img)
 frame = cv2.cvtColor(img_np, cv2.COLOR_BGR2RGB) # ImageGrab获取的颜色为BGR排序,需转换为RGB
 out.write(frame)
 self.count += 1
 label = tkinter.Label(self.tk, text=f"{int(self.count / 14)}秒")
 label.pack()
 label.place(x=320, y=55, anchor='n')
 # 点击ESC退出
 if self.flag == True:
 tkinter.messagebox.showinfo('提示', '录屏结束')
 self.flag = False # 改变录屏状态
 break
 out.release()
 cv2.destroyAllWindows()
作者:不会代码的小林原文地址:https://blog.csdn.net/weixin_46105038/article/details/118764871

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