refine the master-refine-01 branch, refine code, delete the one which looked like useness

删除了一些看上去是多余的东西, 基本上所有东西的获取都在构造函数里面完成
refine code in ffmepg_php

add get sample aspect ratio, add get audio channels, add get audio
sample rate
merge master code with master-refine-01

merge master code with master-refine-01