We don't handle "mute", we only handle 0-volume. I'd be happy to add get/set-volume command-line options though.

From "remote conroller" side of view it is more easy to operate
by toggle_mute requests (inside totem it could be realized as 0-volume/previous-volume of cource). 
In this case there are no needs to store volume value somethere for "remote controller"

Created attachment 113604 [details] [review]
Adds toggle mute to the remote control interface.

This patch adds --mute remote control interface to toggle mute.
As this is my first code patch for gnome I'm not terribly sure if this is a good/proper implementation.

I'd rather you added a totem_action_toggle_mute() function, and did all the work in there instead.

2008-12-05  Bastien Nocera  <hadess@hadess.net>

        * src/totem-options.c (totem_options_process_for_server):
        * src/totem-options.h:
        * src/totem-private.h:
        * src/totem.c (totem_action_exit), (totem_action_volume_relative),
        (totem_action_volume_toggle_mute),
        (volume_button_value_changed_cb), (totem_action_remote):
        * src/totem.h: Add proper support for mute toggling through
        the remote interface, and add a command-line option for it
        (Closes: #554318)