centos安装FFmpeg

获取ffmpeg下载地址

ffmpeg官网下载地址

直接安装

直接安装编译好的程序，只需要在ffmpeg官网下载地址按下图位置复制链接下载解压即可使用

编译安装

考虑到后续可能会需要添加第三方组件，则可以按照下面的步骤源码安装

下载ffmpeg

mkdir /usr/local/src/ffmpeg
cd /usr/local/src/ffmpeg
wget https://ffmpeg.org/releases/ffmpeg-4.2.1.tar.bz2
tar -xjvf ffmpeg-4.2.1.tar.bz2
cd ffmpeg-4.2.1
# 一般会报错yasm过旧或者不存在
# prefix参数为编译安装目录，我这边使用/usr/local/ffmpeg-4.2.1
./configure --enable-shared --prefix=/usr/local/ffmpeg-4.2.1

如果未安装yasm会出现下面错误
nasm/yasm not found or too old. Use --disable-x86asm 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
[email protected] mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file “ffbuild/config.log” produced by configure as this will help
solve the problem.

获取yasm下载地址

yasm官网下载地址

下载安装yasm

cd /usr/local/src/ffmpeg
wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz
tar -xvzf yasm-1.3.0.tar.gz
cd yasm-1.3.0
./configure
make & make install

安装ffmpeg

cd /usr/local/src/ffmpeg/ffmpeg-4.2.1
./configure --enable-shared --prefix=/usr/local/ffmpeg-4.2.1
make && make install
#检查文件目录
cd /usr/local/ffmpeg-4.2.1

检查一下是否有bin,include,lib,share这4个目录
bin是ffmpeg主程序二进制目录
include是C/C++头文件目录
lib是编译好的库文件目录
share是文档目录

如果是首次安装，需要将lib目录未加载到链接到系统库中

vi /etc/ld.so.conf.d/ffmpeg.conf

将lib目录地址添加到配置文件中，参考下面

/usr/local/ffmpeg-4.2.1/lib

#执行命令使配置生效
ldconfig
cd /usr/local/ffmpeg-4.2.1/bin
#检查版本
./ffmpeg -version

如果配置不生效会报下面错误

./ffmpeg: error while loading shared libraries: libavdevice.so.58: cannot open shared object file: No such file or directory