python判断视频是否为mp3格式的方法介绍

# coding: utf-8

import os

#mp3filePath是否是mp3格式的

def isMp3Format(mp3filePath):

 #读取文件内字符串

 f = open(mp3filePath, "r");

 fileStr = f.read();

 f.close();

 head3Str = fileStr[:3];

 #判断开头是不是ID3

 if head3Str == "ID3":

  return True;

 #判断结尾有没有TAG

 last32Str = fileStr[-32:];

 if last32Str[:3] == "TAG":

  return True;

 #判断第一帧是不是FFF开头, 转成数字

 # fixme 应该循环遍历每个帧头，这样才能100%判断是不是mp3

 ascii = ord(fileStr[:1]);

 if ascii == 255:

  return True;

 return False;

#遍历folderPath看看是不是都是mp3格式的，

#是就true，不是就是false, 并返回是mp3的list，不是MP3的list

def isMp3FolderTraverse(folderPath):

 mp3List = [];

 notMp3List = [];

 isAllMpFormat = True;

 for dirpath, dirnames, filenames in os.walk(folderPath):

  for filename in filenames:

   path = dirpath + os.sep + filename;

   isMp3 = isMp3Format(path);

   #判断是不是mp3结尾的 并且 是mp3格式的

   if isMp3 == False and str.endswith(path, ".mp3") == True:

    # print("--warning: file " + path + " is not mp3 format!--");

    notMp3List.append(path);

    isAllMpFormat = False;

   else:

    mp3List.append(path);

 return isAllMpFormat, mp3List, notMp3List;

if __name__ == '__main__':

 isMp3Format("s_com_click1.mp3");

 isAllMp3, mp3List, notMp3List = isMp3FolderTraverse("sound");

 print isAllMp3;

 print mp3List;

 print notMp3List;