rpmforge又名repoforge，是CentOS官方推荐的第三方yum源。提供超过5000种rpm格式的软件包，其中包括vlc、mplayer、xmms-mp3等流行的多媒体工具。

C7:

wget http://repository.it4i.cz/mirrors/repoforge/redhat/el7/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.3-1.el7.rf.x86_64.rpm
rpm -ivh rpmforge-release-0.5.3-1.el7.rf.x86_64.rpm

C6:

i386
wget http://repository.it4i.cz/mirrors/repoforge/redhat/el6/en/i386/rpmforge/RPMS/rpmforge-release-0.5.3-1.el6.rf.i686.rpm
rpm -ivh rpmforge-release-0.5.3-1.el6.rf.i686.rpmx86_64
wget http://repository.it4i.cz/mirrors/repoforge/redhat/el6/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm
rpm -ivh rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm

C5:

i386
wget http://repository.it4i.cz/mirrors/repoforge/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.5.3-1.el5.rf.i386.rpm
rpm -ivh rpmforge-release-0.5.3-1.el5.rf.i386.rpmx86_64
wget http://repository.it4i.cz/mirrors/repoforge/redhat/el5/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.3-1.el5.rf.x86_64.rpm
rpm -ivh rpmforge-release-0.5.3-1.el5.rf.x86_64.rpmppc
wget http://repository.it4i.cz/mirrors/repoforge/redhat/el5/en/ppc/rpmforge/RPMS/rpmforge-release-0.5.1-1.el5.rf.ppc.rpm
rpm -ivh rpmforge-release-0.5.1-1.el5.rf.ppc.rpm

上面这些rpm包的地址都可以到https://pkgs.org网站中直接搜索相应的rpm包即可，如：直接搜索rpmforge或者epel，找到合适的rpm包后下载即可

验证安装：

[root@localhost ~]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* rpmforge: ftp.kddilabs.jp* updates: mirrors.aliyun.com
repo id                             repo name                                                           status
base                                CentOS-6 - Base - mirrors.aliyun.com                                6,706
extras                              CentOS-6 - Extras - mirrors.aliyun.com                                 46
rpmforge                            RHEL 6 - RPMforge.net - dag                                         4,718
updates                             CentOS-6 - Updates - mirrors.aliyun.com                               721
repolist: 12,191

使用RPMforge(Repoforge)源查找mplayer

[root@localhost ~]# yum --enablerepo=rpmforge info mplayer
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* rpmforge: mirrors.tuna.tsinghua.edu.cn* updates: mirrors.aliyun.com
Available Packages
Name        : mplayer
Arch        : x86_64
Version     : 1.0
Release     : 0.48.svn20100703.el6.rf
Size        : 4.0 M
Repo        : rpmforge
Summary     : MPlayer, the Movie Player for Linux
URL         : http://mplayerhq.hu/
License     : GPL
Description : MPlayer is a multimedia player. It plays most video formats as well as DVDs.: Its big feature is the wide range of supported output drivers. There are also: nice antialiased shaded subtitles and OSD.:: On x86, additional Win32 binary codecs should be added to /usr/lib64/codecs/.:: Available rpmbuild rebuild options :: --with : dvdread: --without : aalib lirc cdparanoia arts xvid esd lzo fame caca dvb vstream:             theora osdmenu gcccheck fribidi xvmc x264 faac mpc live ladspa:             amrnb samba speex twolame

安装mplayer:

[root@localhost ~]# yum install mplayer

禁用RPMforge(Repoforge)源：

[root@localhost ~]# vi /etc/yum.repos.d/rpmforge.repo
将enabled=1选项改为enabled=0。

参考：

http://repoforge.org/use/

https://pkgs.org/

http://quenywell.com/how-to-set-up-rpmforge-repoforge-repository-on-rhel-centos/