安装ffmpeg：
下载文件
wget http://ffmpeg.org/releases/ffmpeg-1.0.1.tar.gz
tar -xf ffmpeg-1.0.1.tar.gz
cd ffmpeg-1.0.1
./configure
显示错误：
[root@tester ffmpeg-1.0.1]# ./configure
yasm not found, use --disable-yasm for a crippled build
If you think configure made a mistake, make sure you are using the latest
version from Git. If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solving the problem.
yum install yasm
然后再编译
./make
./make install
安装libx264
http://www.cnblogs.com/MikeZhang/archive/2012/07/21/installFFmpegFromSourceCode.html
http://zhidao.baidu.com/question/192172258.html
nginx和nginx_mod_h264_streaming模块
安装这个模块的目的是让视频可以在线播放，否则视频就只能下载下来才能看了
下载nginx-1.2.6和nginx_mod_h264_streaming源码
./configure --add-module=/XXXX/nginx_mod_h264_streaming/
./make
make的时候可能会出现错误：
In file included from /root/software/nginx_mod_h264_streaming-2.2.7//src/ngx_http_h264_streaming_module.c:2:
/root/software/nginx_mod_h264_streaming-2.2.7//src/ngx_http_streaming_module.c: In function ‘ngx_streaming_handler’:
/root/software/nginx_mod_h264_streaming-2.2.7//src/ngx_http_streaming_module.c:158: error: ‘ngx_http_request_t’ has no member named ‘zero_in_uri’
make[1]: *** [objs/addon/src/ngx_http_h264_streaming_module.o] Error 1
make[1]: Leaving directory `/root/software/nginx-1.2.6'
make: *** [build] Error 2
解决方法：
注释掉nginx_mod_h264_streaming-2.2.7/src/ngx_http_streaming_module.c的158到161行
然后重新make，make install就安装成功了
