gdalbuildvrt 
        '$output'
        -q 
        #for $i in $input
            '$i'
        #end for
        
        #if $settings.advanced=='advanced'       

            $settings.b
            
            #if $settings.condi_te.te=='te'
                -te $settings.condi_te.xmin $settings.condi_te.ymin $settings.condi_te.xmax $settings.condi_te.ymax
            #end if
                
            #if $settings.condi_tr.tr=='tr'
                -tr $settings.condi_tr.xres $settings.condi_tr.yres
            #end if
                
            #if $settings.condi_resample.resample=='resampling'
                -r $settings.condi_resample.r
            #end if
                
            #if $settings.condi_resolution.resolution=='chose_resolution'
                -r $settings.condi_resolution.reso
            #end if
                
            #if str($settings.a_srs).strip()!=''
                -a_srs '$settings.a_srs'
            #end if
                
            $settings.tap
            $settings.addalpha
            $settings.hidenodata
            $settings.separate
             
##            #if str($settings.oo).strip()!=''
##                -oo '$settings.oo'
##           #end if
                
            $settings.allow_projection_difference
                
            #if str($settings.tileindex).strip()!=''
                -tileindex '$settings.tileindex'
            #end if
                
            #if str($settings.sb).strip()!=''
                -sd '$settings.sb'
            #end if
                                        
        #end if