描述：ngfs-3g挂在WINDOWS分区后，播放MP4文件，totem提示缺少MPEG-4 AAC插件，自动搜索无法找到插件
百度GOOGLE了下，找到fedora社区的解决方法
1. Enable EPEL
su -c \'rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm\' ... su -c \'yum install foo\'
2. Installing free and nonfree repositories
su -c \'yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/el/updates/6/i386/rpmfusion-free-release-6-1.noarch.rpm
http://download1.rpmfusion.org/nonfree/el/updates/6/i386/rpmfusion-nonfree-release-6-1.noarch.rpm\'
3. install codes,enjoy!
4. 如若以上方法没有解决问题，可以添加ATRPMS源，编辑/etc/yum.repo.d/atrpms.repo,添加即可
sudo touch /etc/yum.repo.d/atrpms.repo su -c \'echo "[atrpms] name=Fedora Core $releasever - $basearch - ATrpms baseurl=http://dl.atrpms.net/el$releasever-$basearch/atrpms/stable gpgkey=http://ATrpms.net/RPM-GPG-KEY.atrpms gpgcheck=1" > /etc/yum.repo.d/atrpms.repo\'
sudo yum update