网站建设中常见问题分析seo网站做推广的公司

使用Python+OpenCV将多级嵌套文件夹下的视频文件抽帧为JPG图片

import os
import cv2
import time# 存放视频文件的多层嵌套文件夹路径
videoPath = 'D:\\videos\\'
# 保存抽帧的图片的文件夹路径
savePath = 'D:\\images\\'if not os.path.exists(savePath):os.mkdir(savePath)
video_num = 0for root, dirs, files in os.walk(videoPath):# 提取多级嵌套文件夹路径下的文件列表for video in files:print(video)if(video.endswith(".avi")):c = 1videofile = root + 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()

其中timeF变量是定义视频抽帧间隔频率，可修改