fix multiple input values

otb/OTBAlgorithm.py

@@ -250,22 +250,21 @@ class OTBAlgorithm(QgsProcessingAlgorithm):
         otb_cli_file  = OTBUtils.OTB_CLI_FILE
         command = OTBUtils.OTB_CLI_FILE +  ' ' + self.name() + ' ' + OTBUtils.appFolder()
         for k, v in parameters.items():
-
-            if k == 'outputpixeltype':
+            if k == 'outputpixeltype' or not v:
                 continue
-                
+
             if isinstance(v, list):
-                values = []
+                value = ''
                 for i in v:
-                    values.append(self.get_value(i))
-                value = ','.join(values)
+                    value += '"{}" '.format(self.get_value(i))
             else:
-                value = self.get_value(v)
+                value = '"{}"'.format(self.get_value(v))
 
             if k == output_key and 'outputpixeltype' in parameters:
-                value = value + ' ' + self.pixelTypes[int(parameters['outputpixeltype'])]
+                output_pixel_type = self.pixelTypes[int(parameters['outputpixeltype'])]
+                value = '"{}" "{}"'.format(value, output_pixel_type)
 
-            command += ' -{} "{}"'.format(k, value)
+            command += ' -{} {}'.format(k, value)
 
         QgsMessageLog.logMessage(self.tr('cmd={}'.format(command)), self.tr('Processing'), Qgis.Critical)
         if not os.path.exists(otb_cli_file) or not os.path.isfile(otb_cli_file):