diff --git a/py/defs/__init__.py b/py/defs/__init__.py
index e69de29..d472097 100644
--- a/py/defs/__init__.py
+++ b/py/defs/__init__.py
@@ -0,0 +1,17 @@
+import glob
+import importlib
+import os
+
+from .captures import CAPTURE_FIELD_LIST
+from .samplers import SAMPLERS
+
+dir_name = os.path.dirname(os.path.abspath(__file__))
+for module_path in glob.glob(dir_name + "/ext/*.py"):
+    module_name = os.path.basename(module_path)
+    module_name = os.path.splitext(module_name)[0]
+    package_name = (
+        f"custom_nodes.ComfyUI-SaveImageWithMetaData.py.defs.ext.{module_name}"
+    )
+    module = importlib.import_module(package_name)
+    CAPTURE_FIELD_LIST.update(getattr(module, "CAPTURE_FIELD_LIST", {}))
+    SAMPLERS.update(getattr(module, "SAMPLERS", {}))
diff --git a/py/defs/ext/size_from_presets.py b/py/defs/ext/size_from_presets.py
new file mode 100644
index 0000000..f667a5b
--- /dev/null
+++ b/py/defs/ext/size_from_presets.py
@@ -0,0 +1,22 @@
+from ..meta import MetaField
+
+
+def get_width(preset):
+    return preset.split("x")[0].strip()
+
+
+def get_height(preset):
+    return preset.split("x")[1].strip()
+
+
+CAPTURE_FIELD_LIST = {
+    "EmptyLatentImageFromPresetsSD15": {
+        MetaField.IMAGE_WIDTH: {"field_name": "preset", "format": get_width},
+        MetaField.IMAGE_HEIGHT: {"field_name": "preset", "format": get_height},
+    },
+    "EmptyLatentImageFromPresetsSDXL": {
+        MetaField.IMAGE_WIDTH: {"field_name": "preset", "format": get_width},
+        MetaField.IMAGE_HEIGHT: {"field_name": "preset", "format": get_height},
+    },
+    # TODO RandomEmptyLatentImageFromPresetsSD..
+}
diff --git a/py/defs/meta.py b/py/defs/meta.py
index 4f3ae56..250ee38 100644
--- a/py/defs/meta.py
+++ b/py/defs/meta.py
@@ -1,7 +1,7 @@
-from enum import Enum
+from enum import IntEnum
 
 
-class MetaField(Enum):
+class MetaField(IntEnum):
     MODEL_NAME = 0
     MODEL_HASH = 1
     POSITIVE_PROMPT = 10
diff --git a/py/nodes/node.py b/py/nodes/node.py
index 27b452d..be95122 100644
--- a/py/nodes/node.py
+++ b/py/nodes/node.py
@@ -57,11 +57,12 @@ class SaveImageWithMetaData(BaseNode):
             inputs = Capture.get_inputs()
             print("[get_inputs]")
             print(inputs)
+
+            print("[PNGInfo Dict]")
             pnginfo_dict = Capture.gen_pnginfo_dict(inputs)
             if len(images) >= 2:
                 pnginfo_dict["Batch index"] = index
                 pnginfo_dict["Batch size"] = len(images)
-            print("[PNGInfo Dict]")
             print(pnginfo_dict)
 
             metadata = None