视频抽帧

import cv2
from PIL import Image
import numpy as np
cap=cv2.VideoCapture("C:/Users/xpp/Desktop/Lena.mp4")#获取视频对象
isOpened=cap.isOpened#判断是否打开
#视频信息获取
fps=cap.get(cv2.CAP_PROP_FPS)
imageNum=0
sum=0
timef=1#隔1帧保存一张图片
while (isOpened):
    sum+=1
    (frameState, frame)=cap.read()#记录每帧及获取状态
    if frameState==True and (sum%timef==0):
        #格式转变，BGRtoRGB
        frame=cv2.cvtColor(frame,cv2.COLOR_BGR2RGB)
        #转变成Image
        frame=Image.fromarray(np.uint8(frame))
        frame=np.array(frame)
        #RGBtoBGR满足opencv显示格式
        frame=cv2.cvtColor(frame,cv2.COLOR_RGB2BGR)
        imageNum=imageNum+1
        fileName='C:/Users/xpp/Desktop/Lena/'+str(imageNum)+'.jpg'#存储路径
        cv2.imwrite(fileName,frame,[cv2.IMWRITE_JPEG_QUALITY,100])
        print(fileName+" successfully write in")#输出存储状态
    elif frameState==False:
        break
print('finish!')
cap.release()