centos安装ffmpeg4.2

yum install autoconf automake bzip2 cmake freetype-devel gcc gcc-c++ git libtool make mercurial pkgconfig zlib-devel x264-devel
yum install -y yasm

$ tar xvJf ffmpeg-4.2.tar.xz
$ cd ffmpeg-4.2
$ ./configure && make && make install

编辑 /etc/ld.so.conf ，将ffmpeg依赖的库加入系统环境：

$ vim /etc/ld.so.conf
# 输入以下内容
include ld.so.conf.d/*.conf
/usr/local/ffmpeg/lib/
$ ldconfig # 使上述配置生效

$ ln -s /usr/local/ffmpeg/bin/ffmpeg /usr/bin/ffmpeg