centos自带的播放器没有包含视频解码器，播放视频时报错，同时在线搜索不到，通过执行下属命令，可以是播放器在线获取解码器：
Fedora 22 and later:
su -c 'dnf install https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm https://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm'
Fedora 14 to Fedora 21 :
su -c 'yum install --nogpgcheck https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm https://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm'
RHEL 5 or compatible like CentOS:
su -c 'rpm -Uvh https://download1.rpmfusion.org/free/el/updates/5/i386/rpmfusion-free-release-5-1.noarch.rpm https://download1.rpmfusion.org/nonfree/el/updates/5/i386/rpmfusion-nonfree-release-5-1.noarch.rpm'
RHEL 6 or compatible like CentOS:
su -c 'yum localinstall --nogpgcheck https://download1.rpmfusion.org/free/el/updates/6/i386/rpmfusion-free-release-6-1.noarch.rpm https://download1.rpmfusion.org/nonfree/el/updates/6/i386/rpmfusion-nonfree-release-6-1.noarch.rpm'
同时也可以执行如下命令，安装mplayer播放器：
yum -y install mplayer 播放器主程序，约15MByum -y install mplayer-gui 图形界面的壳，约230KByum -y install ffmpeg* 各种解码器，约22MB参考地址：
https://rpmfusion.org/Configuration