[ruby-it] Aiuto ruby-gstreamer

[Giorgio Gambino]

Ciao a tutti
ho abbozzato un semplice lettore audio usango ruby-gtk e ruby-gstreamer il
problema è che non riesco a usare la classe Gst::Thread mi da sempre questo
errore :

./M.audio.rb:31:in `play': uninitialized constant Gst::Thread
     from ./M.audio.rb:58
     from ./M.audio.rb:62:in `call'
     from ./M.audio.rb:62:in `main'
     from ./M.audio.rb:62

qualche dritta?
Grazie
di seguito c'è il codice:
#!/usr/bin/env ruby

require 'gst'
require 'gtk2'


class Player
        @stopped = 0

    def initialize
        @pipeline = Gst::Pipeline.new
        @src = Gst::ElementFactory.make("filesrc")
        @dec = Gst::ElementFactory.make("mad")
        @sink = Gst::ElementFactory.make("autoaudiosink")
        @pipeline.add(@src, @dec, @sink)
        @src >> @dec >> @sink

    end

    def get_song
        if ARGV.size != 1
            puts "Troppe Canzoni"
            exit
        end
        @song = ARGV.first
        @src.location = @song
    end

    def play

        Thread.new do

            while @stopped != 1
            @pipeline.play
            end
        end

    end

    def pause

        @stopped = 0

            @pipeline.pause

    end

end

Gst.init
P = Player.new
P.get_song
window = Gtk::Window.new('Player')
window.border_width = 10
window.resizable = true
window.window_position = Gtk::Window::POS_CENTER
button = Gtk::Button.new('play')
button.signal_connect('clicked'){   P.play   }
window.signal_connect('destroy'){   Gtk.main_quit   }
window.add(button)
window.show_all
Gtk.main