实测有效:centos 安装 ffmpeg（centos6.5安装ftp）

FFmpeg是一套可以用来记录、转换数字音频、视频，并能将其转化为流的开源计算机程序。采用LGPL或GPL许可证。它提供了录制、转换以及流化音视频的完整解决方案。它包含了非常先进的音频/视频编解码库libavcodec，为了保证高可移植性和编解码质量，libavcodec里很多code都是从头开发的。

1.安装依赖。如有就不用安装

// 安装打包依赖
 # wget -c ftp://195.220.108.108/linux/dag/redhat/el6/en/x86_64/dag/RPMS/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm
 # rpm -Uhv rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm 
 # yum -y install automake autoconf make gcc gcc-c++ libtool zlib zlib-devel curl curl-devel alsa-lib alsa-lib-devel gettext gettext-devel expat expat-devel nasm pkgconfig
 # yum -y install bzip2

2.安装libx264 需要使用nasm依赖

# yum install yasm yasm-devel
# wget https://www.nasm.us/pub/nasm/releasebuilds/2.14/nasm-2.14.tar.gz
# cd nasm-2.14
# ./configure
# make
# make install

3.安装libx264

# git clone https://code.videolan.org/videolan/x264.git
# cd x264
// 如果不将include和lib安装在/usr/local目录，之后运行ffmpeg命令时可能仍然报错误
# ./configure --prefix=/usr/x264/ --includedir=/usr/local/include --libdir=/usr/local/lib --enable-shared
# make 
# make install

4.安装 libfdk-aac

$ wget https://downloads.sourceforge.net/opencore-amr/fdk-aac-2.0.1.tar.gz
$ tar zxvf fdk-aac-2.0.1.tar.gz
$ cd fdk-aac-2.0.1
$ ./configure --disable-static
$ make
# make install

5.安装 openssl

$ wget http://mirrors.ibiblio.org/openssl/source/old/1.0.2/openssl-1.0.2k.tar.gz
$ tar -xvf openssl-1.0.2k.tar.gz
$ cd openssl-1.0.2k
$ ./config shared
$ make 
# make install 
# yum -y install openssl-devel

6.安装gnutls, lame,faac

# yum -y install gnutls gnutls-devel
# yum -y install lame lame-devel
# yum -y install faac faac-devel

7.安装ffmpeg主应用

$ wget http://ffmpeg.org/releases/ffmpeg-4.2.2.tar.bz2
$ taf -jxvf ffmpeg-4.2.2.tar.bz2 
$ cd ffmpeg-4.2.2
$ ./configure --prefix=/home/user/app/ffmpeg --enable-gpl --enable-version3 --enable-pthreads --enable-shared --enable-libmp3lame --enable-libx264 --enable-pic --enable-libfdk-aac --enable-openssl --enable-nonfree
$ make 
# make install

8.设置全局

# vi /etc/profile 
// 在profile文件中加入 
PATH=$PATH:/usr/local/ffmpeg/bin 
export PATH 
# source /etc/profile

9.可能会出现ffmpeg: error while loading shared libraries: libavdevice.so.58: cannot open shared object file: No such file or directory的错误

# vi /etc/ld.so.conf 
// 添加 刚才的安装目录 
  /home/account/app/ffmpeg/lib 
  /usr/lib 
  /usr/lib64 
  /usr/local/lib 
# ldconfig

10.测试安装

$ ffmpeg -version
// libx264安装是否成功
$ ffmpeg -h encoder=libx264