Linux下编译和安装ffmpeg

本文演示Centos下面如何编译和安装ffmpeg的过程，

一、ffmpeg的编译和安装

1、下载解压

wget http://www.ffmpeg.org/releases/ffmpeg-5.1.tar.gz
tar -zxvf ffmpeg-5.1.tar.gz

2、进入压缩目录，编译编译和安装

cd ffmpeg-5.1

./configure --prefix=/usr/local/ffmpeg --enable-debug=3 --enable-shared --disable-static

make && make install

3、配置环境变量

vi /etc/profile
# 在最后PATH添加环境变量：
export PATH=$PATH:/usr/local/ffmpeg/bin
# 保存退出
# 查看是否生效
source /ect/profile  设置生效

4、查看版本

ffmpeg -version

二、错误处理

1、若安装过程中出现以下错误：

yasm/nasm not found or too old. Use --disable-yasm 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
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solve the problem.

需要安装yasm

wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz
tar -zxvf yasm-1.3.0.tar.gz
cd yasm-1.3.0
./configure --prefix=/usr/local/yasm  
make && make install
#要降目录加到PATH中，否则还是会报错
export PATH="$PATH:/usr/local/yasm/bin"

2、如果出现如下错误

 error while loading shared libraries: libavdevice.so.59: cannot open shared object file: No such file or directory

解决办法：将安装的lib加入到/ect/ld.so.conf中，

• 1、vim vi /etc/ld.so.conf
• 2、加入配置/usr/local/ffmpeg/lib，具体看自己的安装目录
  
• 3、刷新配置ldconfig

3、若出现以下错误：

ffmpeg: error while loading shared libraries: libiconv.so.2: cannot open shared object file: No such file or directory

原因是没有 libiconv.so.2，需要安装

#下载libiconv
wget https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.16.tar.gz
tar -zxvf libiconv-1.16.tar.gz
cd libiconv-1.16
 
#编译安装
./configure --prefix=/usr/local
make
make_install
ln -s /usr/local/lib/libiconv.so.2 /usr/lib/libiconv.so.2
ldconfig

三、最终结果