feat: use jpeg instead of jpg, use enums instead of strings (#2453)

* fix: parse width and height as int when applying metadata (#2452)

fixes an issue with A1111 metadata scheme where width and height are strings after splitting resolution

* feat: use jpeg instead of jpg, use enums instead of strings

modules/config.py

@@ -8,7 +8,7 @@ import modules.sdxl_styles
 
 from modules.model_loader import load_file_from_url
 from modules.util import get_files_from_folder, makedirs_with_log
-from modules.flags import Performance, MetadataScheme
+from modules.flags import OutputFormat, Performance, MetadataScheme
 
 def get_config_path(key, default_value):
     env = os.getenv(key)
@@ -326,7 +326,7 @@ default_max_image_number = get_config_item_or_set_default(
 default_output_format = get_config_item_or_set_default(
     key='default_output_format',
     default_value='png',
-    validator=lambda x: x in modules.flags.output_formats
+    validator=lambda x: x in OutputFormat.list()
 )
 default_image_number = get_config_item_or_set_default(
     key='default_image_number',