从lrc歌词文件中批量提取歌词，歌词文件放在L1文件夹，转换后的歌词放在L2中，L1和L2与可运行文件在同一目录-lyrics from the LRC document Batch extraction lyrics, the lyrics of the document L1 folders, after converting the lyrics on the L2, L1 and L2 and can run in the same document directory