该代码是在搜索出来的，主要用于多媒体音频信息的自动提取，有某些特征值的提取。-The code is out in the search, mainly for multimedia audio information automatically extracted, there are certain characteristics extraction.

Flash可以播放的Flv文件格式提取工具，可以提取音频文件，只允许FLV文件中的音频文件为MP3格式。-Flash can play the Flv file format extraction tool to extract audio files and allow only FLV files to MP3 format audio files.