if ( glsl && ( filter = mlt_filter_new() ) ) {
mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
+ glsl->add_ref( properties );
mlt_properties_set( properties, "neutral_color", arg? arg : "#7f7f7f" );
mlt_properties_set_double( properties, "color_temperature", 6500.0 );
filter->process = process;