最近给客户演示程序运行结果,我就想到用Python写一个录屏程序,在网上能找到现成的源码,但是它的录屏是录制整个屏幕的。但是在屏幕桌面下方的任务栏工具栏里有些东西,不希望被录制到视频里,因此需要实现一个选择区域录屏,就像qq截图那样的。我编写的程序如下,在主函数的输入参数里有一个选项控制是全屏录制还是选择区域录制。在编写这个程序时,我有一个疑问,在初始化写视频VideoWriter函数的第4个参数,它表示视频帧的高和宽,全屏录制方式的参数是(height,width),选择区域录制的参数是(width,height)。我曾尝试过把这个参数统一写成(height,width)或者(width,height)。但是运行程序后,总有一种录屏方式保存的视频文件是无法打开的,文件大小是1kb,不知这是为何?
import cv2 from PIL import ImageGrab import numpy as np import argparse import time global img global point1, point2 def on_mouse(event, x, y, flags, param): global img, point1, point2 img2 = img.copy() if event == cv2.EVENT_LBUTTONDOWN: # 左键点击 point1 = (x, y) cv2.circle(img2, point1, 10, (0, 255, 0), thickness=2) cv2.imshow('image', img2) elif event == cv2.EVENT_MOUSEMOVE and (flags & cv2.EVENT_FLAG_LBUTTON): # 按住左键拖曳 cv2.rectangle(img2, point1, (x, y), (255, 0, 0), thickness=2) cv2.imshow('image', img2) elif event == cv2.EVENT_LBUTTONUP: # 左键释放 point2 = (x, y) cv2.rectangle(img2, point1, point2, (0, 0, 255), thickness=2) cv2.imshow('image', img2) def select_roi(frame): global img, point1, point2 img = cv2.cvtColor(np.array(frame), cv2.COLOR_RGB2BGR) winname = 'image' cv2.namedWindow(winname, cv2.WINDOW_NORMAL) cv2.setWindowProperty(winname, cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN) cv2.setMouseCallback(winname, on_mouse) cv2.imshow(winname, img) cv2.waitKey(0) cv2.destroyAllWindows() return point1, point2 if __name__ == '__main__': parser = argparse.ArgumentParser() parser.add_argument('--fps', type=int, default=10, help='frame per second') parser.add_argument('--total_time', type=int, default=15, help='video total time') parser.add_argument('--savename', type=str, default='video.mp4', help='save file name') parser.add_argument('--screen_type', default=1, type=int, choices=[0, 1], help='1: full screen, 0: region screen') args = parser.parse_args() print('等到3秒,请切换到录屏的页面') if args.screen_type==0: print('Press Esc to close window') time.sleep(3) curScreen = ImageGrab.grab() # 获取屏幕对象 if args.screen_type: height, width = curScreen.size min_x, min_y, max_x, max_y = 0, 0, width, height fourcc = cv2.VideoWriter_fourcc(*'mp4v') video = cv2.VideoWriter(args.savename, fourcc, args.fps, (height, width)) else: point1, point2 = select_roi(curScreen) min_x = min(point1[0], point2[0]) min_y = min(point1[1], point2[1]) max_x = max(point1[0], point2[0]) max_y = max(point1[1], point2[1]) height, width = max_y - min_y, max_x - min_x fourcc = cv2.VideoWriter_fourcc(*'mp4v') video = cv2.VideoWriter(args.savename, fourcc, args.fps, (width, height)) imageNum = 0 while True: imageNum += 1 captureImage = ImageGrab.grab() # 抓取屏幕 frame = cv2.cvtColor(np.array(captureImage), cv2.COLOR_RGB2BGR) if args.screen_type==0: frame = frame[min_y:max_y, min_x:max_x, :] if imageNum < args.fps * args.total_time: video.write(frame) # 退出条件 if cv2.waitKey(50) == ord('q') or imageNum > args.fps * args.total_time: break video.release() cv2.destroyAllWindows()
到此这篇关于python实现录制全屏和选择区域录屏功能的文章就介绍到这了,更多相关python录屏内容请搜索菜鸟教程(cainiaojc.com)以前的文章或继续浏览下面的相关文章希望大家以后多多支持菜鸟教程(cainiaojc.com)!
声明:本文内容来源于网络,版权归原作者所有,内容由互联网用户自发贡献自行上传,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任。如果您发现有涉嫌版权的内容,欢迎发送邮件至:notice#cainiaojc.com(发邮件时,请将#更换为@)进行举报,并提供相关证据,一经查实,本站将立刻删除涉嫌侵权内容。