http://trac.ffmpeg.org/wiki/How%20to%20quickly%20compile%20libx264
下载源代码：
wget http://www.tortall.net/projects/yasm/releases/yasm-1.2.0.tar.gz

配置：./configure
编译：make
安装：make install

参考:
1,http://blog.csdn.net/cmsbupt/article/details/9962845

(转)Linux下安装YASM--编译x264