javam4a 音频文件读取， mp3 容易， m4a 的头部信息基本跟 mp3 差不多的解析方式解析不出来。 求高手解决。
A Java API to read, write and create MP4 container. Manipulating containers is different from encoding and decoding videos and audio
https://github.com/sannies/mp4parser