ffmpeg: error while loading shared libraries: libavdevice.so.55: cannot open shared object file: No

ffmpeg正常安装后执行ffmpeg时出现如下错误：

ffmpeg: error while loading shared libraries: libavdevice.so.53: cannot open shared object file: No such file or directory

解决办法：

vi /etc/ld.so.conf

#原文加入：/usr/local/lib

加入自己编译ffmpeg的路径/lib

执行ldconfig