Gnome MPlayer has a rich API that is exposed via DBus. Using DBus you can control a single or multiple instances of GNOME MPlayer from a single command.

The player can be used to play media on websites when used with Gecko Mediaplayer

Gnome MPlayer is not highly dependent on the Gnome libraries, the look and feel of the application is based on the Gnome HIG. The main dependency is on GTK2, GLIB2 and DBUS.