import subprocess
import os
import time

def getTime(flvpath,fid):
   #file_str = '1.flv'
   file_str = flvpath
   wg = subprocess.Popen(['ffmpeg.exe', '-i', file_str], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
   (standardout, junk) = wg.communicate()
   ans = str(standardout)
   num = ans.find("Duration:")
   out = ans[num+10:num+18]
   fid.write(file_str + "<| time is |>" + out)
   fid.write("\r\n")

def getFileName(path, warp):
   #f_list = os.listdir(path)
   #rootdir = os.getcwd()
   rootdir = path
   logname = warp[1:] + '_log.txt'
   fid = open(logname, 'w')
   for (dirpath, dirnames, filenames) in os.walk(rootdir):
       for filename in filenames:
           pathname = os.path.join(dirpath, filename)
           if os.path.splitext(pathname)[1].lower() == warp:
              getTime(pathname,fid)

   fid.close()

if __name__ == "__main__":
   print("Begin time: " + time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()))
   rootdir = "D:\\mooc\\视频资料"
   warp = ".flv"
   getFileName(rootdir, warp)
   warp = ".mp4"
   getFileName(rootdir, warp)
   print("End time:" + time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()))

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