使用Python+OpenCV对视频抽帧保存为JPG图像

使用Python+OpenCV对视频抽帧保存为JPG图像

import os
import cv2
import time#视频文件夹路径，可修改
videoPath = 'D:\\video\\'
#保存的图片文件夹路径，可修改
savePath = 'D:\\images\\'
videolist = os.listdir(videoPath)
if not os.path.exists(savePath):os.mkdir(savePath)
video_num = 0
for video in videolist:if(video.endswith(".avi")):c = 1videofile = videoPath + videovc = cv2.VideoCapture(videofile) #读入视频文件if vc.isOpened(): #判断是否正常打开video_num = video_num + 1rval , frame = vc.read()#print("正常打开：",video)if(video_num%100 == 0):print(video_num)else:rval = Falseprint("打开失败：",video)continuetimeF = 25  #视频帧计数间隔频率，可修改try:while rval:   #循环读取视频帧rval, frame = vc.read()if(c%timeF == 0): #每隔timeF帧进行存储操作cv2.imwrite(savePath + video[:-4] + '_' + str(time.time_ns()) + '.jpg',frame) #存储为图像c = c + 1cv2.waitKey(1)except:#print("error")continuevc.release()

以上代码可以修改timeF变量控制抽帧间隔频率。