Storyboard *sb = new Storyboard ();

        DoubleAnimation *r_anim = new DoubleAnimation ();
        registerName ("rect-transform", r_transform);

        double_animation_set_to (r_anim, -360.0);
        double_animation_set_by (r_anim, -0.1);

        timeline_group_add_child (sb, r_anim);
        storyboard_child_set_target_name (sb, r_anim, "rect-transform");
        storyboard_child_set_target_property (sb, r_anim, "RotateTransform::Angle");

        if (v != NULL) {
                DoubleAnimation *v_anim = new DoubleAnimation ();
                registerName ("video-transform", v_transform);
                double_animation_set_to (v_anim, 360.0);
                double_animation_set_by (v_anim, 0.1);

                timeline_group_add_child (sb, v_anim);
                storyboard_child_set_target_name (sb, v_anim, "video-transform");
                storyboard_child_set_target_property (sb, v_anim, "RotateTransform::Angle");
        }

        sb->Begin ();
        printf ("entering main\n");
        gtk_main ();