Python cv2 播Video

Python cv2 播Video
如有误，请指正。
VideoCapture Video file 请自选

import cv2# open video filecap = cv2.VideoCapture('rain.mp4')#--- video information frame_width  = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))frame_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))FPS = int(cap.get(cv2.CAP_PROP_FPS))frame_count  = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))print(f'width {frame_width} height {frame_height}')print(f'FPS: {FPS}  frame_count {frame_count}')#--- setup window for show cv2.namedWindow('video',cv2.WINDOW_KEEPRATIO) cv2.resizeWindow('video', int(frame_width/3), int(frame_height/3))cv2.moveWindow('video',300,200)# read frame by framewhile(True):    ret, frame = cap.read()    cv2.imshow('video',frame)    #播灰阶     #gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)    #cv2.imshow('video',gray)        #waitKey 单位msec  1000msec = 1sec    #FPS=24 表示1sec播24张，所以1000msec/24=25msec    #每张可停格 25msec=waitKey(25) 可设定20~25之间，肉眼无法区分快慢    #Escape key to leave     if cv2.waitKey(20)== 27:        break#--- ending  cap.release()cv2.destroyAllWindows()