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利用python怎么實(shí)現(xiàn)一個(gè)選擇區(qū)域錄屏功能?很多新手對(duì)此不是很清楚,為了幫助大家解決這個(gè)難題,下面小編將為大家詳細(xì)講解,有這方面需求的人可以來學(xué)習(xí)下,希望你能有所收獲。
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: # 左鍵點(diǎn)擊 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): # 按住左鍵拖曳 cv2.rectangle(img2, point1, (x, y), (255, 0, 0), thickness=2) cv2.imshow('image', img2) elif event == cv2.EVENT_LBUTTONUP: # 左鍵釋放 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,請(qǐng)切換到錄屏的頁(yè)面') if args.screen_type==0: print('Press Esc to close window') time.sleep(3) curScreen = ImageGrab.grab() # 獲取屏幕對(duì)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) # 退出條件 if cv2.waitKey(50) == ord('q') or imageNum > args.fps * args.total_time: break video.release() cv2.destroyAllWindows()
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