由于ffmpeg函数库应用难度比较高,特地编写 这套多媒体函数库,对ffmpeg进行易用性包装, 在不损失性能的情况下,更加简易的构造各种 多媒体应用程序.-As the ffmpeg library application was more difficult, specially prepared set of multimedia libraries, for ease of use of the ffmpeg package, without loss of performa