详细的讲述了ffmeg代码的结构和外部接口，可以便于FFMEG学习者很好的掌握代码的全部结构-Ffmeg detail the structure of code and external interface, can be very good learners FFMEG easy to grasp the full structure of the code

ffmeg开源多媒体函数库,支持mpeg,mp3等多种音频视频格式-ffmeg open-source multi-media library, support mpeg, mp3 and other audio and video formats