下载安装包 放在 /usr/local/src 下：
wget http://ffmpeg.org/releases/ffmpeg-4.0.1.tar.bz2
wget https://jaist.dl.sourceforge.net/project/lame/lame/3.100/lame-3.100.tar.gz
wget http://downloads.sourceforge.net/project/opencore-amr/opencore-amr/opencore-amr-0.1.5.tar.gz
安装流程
yum install yasm
或者 rpm安装
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/Packages/y/yasm-1.2.0-1.el6.x86_64.rpm
rpm -ivh yasm-1.2.0-1.el6.x86_64.rpm
cd /usr/local/src
tar -zxvf lame-3.100.tar.gz
cd lame-3.100
./configure
make
make install
cd /usr/local/src
tar -zxvf opencore-amr-0.1.5.tar.gz
cd opencore-amr-0.1.5
./configure
make
make install
cd /usr/local/src
tar -jxvf ffmpeg-4.0.1.tar.bz2
cd ffmpeg-4.0.1
./configure --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-shared
make
make install
vi /etc/ld.so.conf
在文件末尾另起一行加上：/usr/local/lib
ldconfig
ffmpeg #输出版本信息表示安装成功
chmod 0777 /usr/local/bin/ffmpeg
/usr/local/bin/ffmpeg -i 1.amr 1.mp3
