方法1：
# pacman -S mplayer
From: http://www.linuxdiyf.com/viewarticle.php?id=89207
用mplayer循环播放音乐：mplayer -loop 0 5.wma
方法2：
From: https://wiki.archlinux.org/index.php/Codecs_%28%E7%AE%80%E4%BD%93%E4%B8%AD%E6%96%87%29
# yaourt -S amarok
# pacman -S gstreamer0.10-plugins
