系统环境：
CentOS Linux release 8.2.2004 (Core)
1. 首先安装系统编译环境
yum install -y automake autoconf libtool gcc gcc-c++
2. 编译所需源码包
#yasm：汇编器，新版本的ffmpeg增加了汇编代码 wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz tar -xzvf yasm-1.3.0.tar.gz cd yasm-1.3.0 ./configure make make install #lame：Mp3音频解码 wget https://nchc.dl.sourceforge.net/project/lame/lame/3.100/lame-3.100.tar.gz tar -xzvf lame-3.100.tar.gz cd lame-3.100 ./configure make make install #amr支持 wget https://nchc.dl.sourceforge.net/project/opencore-amr/opencore-amr/opencore-amr-0.1.5.tar.gz tar -xzvf opencore-amr-0.1.5.tar.gz cd opencore-amr-0.1.5 ./configure make make install #amrnb支持 wget http://www.penguin.cz/~utx/ftp/amr/amrnb-11.0.0.0.tar.bz2 tar -xjvf amrnb-11.0.0.0.tar.bz2 cd amrnb-11.0.0.0 ./configure make make install #amrwb支持 wget http://www.penguin.cz/~utx/ftp/amr/amrwb-11.0.0.0.tar.bz2 tar -xjvf amrwb-11.0.0.0.tar.bz2 cd amrwb-11.0.0.0 ./configure make make install #ffmpeg wget https://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2 tar -xjvf ffmpeg-snapshot.tar.bz2 cd ffmpeg ./configure --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-shared make make install #加载配置 #最后写入config后，终端运行ffmpeg命令，出现success和已安装的扩展，则运行成功。 ldconfig
3.使用方法
ffmpeg -i 1.mp3 -ac 1 -ar 8000 1.amr #MP3转换AMR ffmpeg -i 1.amr 1.mp3 #AMR转换MP3
附录：
附录1. ffmpeg默认安装目录为“/usr/local/lib”，有些64位系统下软件目录则为“/usr/lib64”，编译过程中可能会出现
“ffmpeg: error while loading shared libraries: libmp3lame.so.0: cannot open shared object file: No such file or directory”等类似的错误，解决办法是建立软链接：
# ln -s /usr/local/lib/libmp3lame.so.0.0.0 /usr/lib64/libmp3lame.so.0
附录2. 如果出现以下提示：ffmpeg: error while loading shared libraries: libavdevice.so.54: cannot open shared object file: No such file or directory
可以通过如下方式查看ffmpeg的动态链接库哪些没有找到：
ldd `which ffmpeg` libavdevice.so.54 => not found libavfilter.so.3 => not found libavformat.so.54 => not found libavcodec.so.54 => not found libswresample.so.0 => not found libswscale.so.2 => not found libavutil.so.51 => not found libm.so.6 => /lib64/libm.so.6 (0x00002ab7c0eb6000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00002ab7c100b000) libc.so.6 => /lib64/libc.so.6 (0x00002ab7c1125000) /lib64/ld-linux-x86-64.so.2 (0x00002ab7c0d9a000) #如果类似于上面的输出内容，查找以上类库，会发现全部在/usr/local/lib/下 find /usr/local/lib/ | grep -E "libavdevice.so.54|libavfilter.so.3|libavcodec.so.54" /usr/local/lib/libavfilter.so.3.17.100 /usr/local/lib/libavcodec.so.54.59.100 /usr/local/lib/libavdevice.so.54 /usr/local/lib/libavcodec.so.54 /usr/local/lib/libavfilter.so.3 /usr/local/lib/libavdevice.so.54.2.101 #查看链接库配置文件 more /etc/ld.so.conf | grep /usr/local/lib #如果不包含的话，需要编辑此文添加： vi /etc/ld.so.conf /usr/local/lib /usr/local/lib64 #运行配置命令 ldconfig