centos 安装 ffmpeg 并添加 libx264库 libfdk-aac库 openssl库

centos 安装 ffmpeg 并添加 libx264 库 libfdk-aac库 openssl库

ffmpeg执行时如添加参数-vcodec libx264，会出现错误：Unknown encoder 'libx264'的错误，缺少libx264库，需要安装该库，安装步骤如下
$ 代表普通用户 # 代表root权限

• 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

• 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

• 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

• 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

• 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

• 安装gnutls, lame,faac

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

• 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

• 设置全局

# vi /etc/profile
// 在profile文件中加入
PATH=$PATH:/home/user/app/ffmpeg/bin
export PATH
# source /etc/profile

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

• 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

• 转码

$ ffmpeg -y -i video.avi -vcodec libx264 -qscale 0 -f mp4 video.mp4

$ ffmpeg -i a.mp3 -b:a 100k -c:a mp3 -ar 44100 "/home/user/a.mp3"

$ ffmpeg -i a.mp4 -b:v 500k -maxrate 500k -minrate 500k -bufsize 1000k -vcodec h264 -x264-params "\"nal-hrd=cbr\"" -s 640x360 -b:a 40k -c:a libfdk_aac -ar 44100 "/home/user/a.mp4"

 -y:覆盖 
 -i:源文件地址
 -vcodec:输出格式(libx264为mp4) 
 -qscale 0:全质量转换
 -f :输出文件格式

• 参考

https://my.oschina.net/ososchina/blog/827182/print
https://www.cnblogs.com/blackhumour2018/p/9400415.html
https://www.howtoing.com/ffmpeg-error-loading-shared-libraries-libavdevice-55-open-shared-object-file-file-directory
https://blog.youkuaiyun.com/yuxielea/article/details/103146362
https://zhuanlan.zhihu.com/p/67878761