说明：  这篇文档真心挺不错的，里面对几乎所有的视频编码格式做了详细的介绍，从最开始的原理性只是图文并茂。看了这个对yuv rawdata等等就会理解的更透彻一些。
(This document is really quite good, which almost all of the video encoding format introduced in detail, from the beginning of the principle just illustrations. Looked at this the yuv rawdata and so will more thorough understanding.)