流媒体：在CentOS7安装ffmpeg流媒体工具

接触流媒体不久&＃xff0c;我用的是CentOS 7系统的主机&＃xff0c;安装ffmpeg是一件非常繁琐的事情。据说ubuntu上比较简单&＃xff0c;只需要apt-get install ffmpeg就行

第一步&＃xff0c;扩展yum仓库

这样可以下载到更多原始仓库中无法找到的扩展

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

第二步&＃xff0c;安装必要的扩展

yum install automake autoconf make gcc gcc-c&＃43;&＃43; libtool zlib zlib-devel curl curl-devel alsa-lib alsa-lib-devel gettext gettext-devel expat expat-devel nasm pkgconfig

第三步&＃xff1a;安装yasm&＃xff0c;用来支持编译x264

方法一

yum install yasm yasm-devel

方法二

wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gztar -zxvf yasm-1.3.0.tar.gzcd yasm-1.3.0./configure
make
make install

第四步&＃xff0c;安装gnutls, lame,faac

yum install gnutls gnutls-devel

yum install lame lame-devel

yum install faac faac-devel

第五步&＃xff0c;安装最新的稳定版x264库

如果不安装&＃xff0c;会提示x264无法找到

卸载系统自带的&＃xff0c;如果不卸载&＃xff0c;可能在安装ffmpeg时会出现版本问题

yum remove x264 x264-devel

安装最新的

wget -c ftp://ftp.videolan.org/pub/x264/snapshots/x264-snapshot-20120718-2245-stable.tar.bz2
tar jxvf x264-snapshot-20120718-2245-stable.tar.bz2
cd x264-snapshot-20120718-2245-stable
./configure --enable-shared --enable-static
make
make install

第六步&＃xff0c;安装ffmpeg

如果做了第一步&＃xff0c;你可能发现yum库里面也能搜索到ffmpeg,但是安装时问题很多&＃xff0c;因此&＃xff0c;建议手动安装

wget http://www.ffmpeg.org/releases/ffmpeg-3.1.tar.gztar -zxvf ffmpeg-3.1.tar.gzcd ffmpeg-3.1./configure --prefix&＃61;/usr/local/ --enable-gpl --enable-version3 --enable-nonfree --enable-shared --enable-zlib --enable-bzlib --enable-libmp3lame --enable-libx264 --enable-pic --enable-libfaac
make
make install

第七步&＃xff0c;配置

1>常见错误&＃xff1a;

“ffmpeg: error while loading shared libraries: libmp3lame.so.0: cannot open shared object file: No such file or directory”等类似的错误&＃xff0c;直接修改/etc/ld.so.conf如下&＃xff1a;

include ld.so.conf.d/*.conf
/usr/local/lib/

或者

ln -s /usr/local/lib/libmp3lame.so.0.0.0 /usr/lib64/libmp3lame.so.0

执行

ldconfig

2>配置ffmpeg全局变量

vi /etc/profile

添加如下内容

export FFMPEG&＃61;/usr/local/ffmpeg

第八步&＃xff0c;检测是否安装成功

ffmpeg -version

输出如下数据&＃xff0c;则表示安装成功

ffmpeg version 3.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
configuration: --prefix&＃61;/usr/local/ --enable-gpl --enable-version3 --enable-nonfree --enable-shared --enable-zlib --enable-bzlib --enable-libmp3lame --enable-libx264 --enable-pic --enable-libfaac
libavutil 55. 27.100 / 55. 27.100
libavcodec 57. 48.101 / 57. 48.101
libavformat 57. 40.101 / 57. 40.101
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 46.102 / 6. 46.102
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
libpostproc 54. 0.100 / 54. 0.100