Merge 8643d75a6b98dfd1f39eb97ea53e1c927314200a into 06a60ac3fec854909f35aba20aa5be39ff59a6e3

Update image_nodes.py

nodes/image_nodes.py

@@ -176,7 +176,7 @@ Saves an image and mask as .PNG with the mask as the alpha channel.
         def file_counter():
             max_counter = 0
             # Loop through the existing files
-            for existing_file in os.listdir(full_output_folder):
+            for existing_file in sorted(os.listdir(full_output_folder)):
                 # Check if the file matches the expected format
                 match = re.fullmatch(fr"{filename}_(\d+)_?\.[a-zA-Z0-9]+", existing_file)
                 if match:
@@ -2981,7 +2981,7 @@ class LoadImagesFromFolderKJ:
                         except OSError:
                             pass
         else:
-            for file in os.listdir(folder):
+            for file in sorted(os.listdir(folder)):
                 if any(file.lower().endswith(ext) for ext in valid_extensions):
                     path = os.path.join(folder, file)
                     try:
@@ -3043,7 +3043,7 @@ class LoadImagesFromFolderKJ:
                     if any(file.lower().endswith(ext) for ext in valid_extensions):
                         image_paths.append(os.path.join(root, file))
         else:
-            for file in os.listdir(folder):
+            for file in sorted(os.listdir(folder)):
                 if any(file.lower().endswith(ext) for ext in valid_extensions):
                     image_paths.append(os.path.join(folder, file))
 
@@ -3964,7 +3964,7 @@ class LoadVideosFromFolder:
             raise ImportError("This node requires ComfyUI-VideoHelperSuite to be installed.")
         videos_list = []
         filenames = []
-        for f in os.listdir(kwargs['video']):
+        for f in sorted(os.listdir(kwargs['video'])):
             if os.path.isfile(os.path.join(kwargs['video'], f)):
                 file_parts = f.split('.')
                 if len(file_parts) > 1 and (file_parts[-1].lower() in ['webm', 'mp4', 'mkv', 'gif', 'mov']):

nodes/lora_nodes.py

@@ -1,6 +1,7 @@
 import torch
 import comfy.model_management
 import comfy.utils
+import comfy.lora
 import folder_paths
 import os
 import logging
@@ -11,6 +12,50 @@ device = comfy.model_management.get_torch_device()
 
 CLAMP_QUANTILE = 0.99
 
+
+def _resolve_weight_from_patches(patches, key):
+    base_weight, convert_func = patches[0]
+    weight_tensor = comfy.model_management.cast_to_device(
+        base_weight, torch.device("cpu"), torch.float32, copy=True
+    )
+    try:
+        weight_tensor = convert_func(weight_tensor, inplace=True)
+    except TypeError:
+        weight_tensor = convert_func(weight_tensor)
+
+    if len(patches) > 1:
+        weight_tensor = comfy.lora.calculate_weight(
+            patches[1:],
+            weight_tensor,
+            key,
+            intermediate_dtype=torch.float32,
+            original_weights={key: patches},
+        )
+
+    return weight_tensor
+
+
+def _build_scaled_fp8_diff(finetuned_model, original_model, prefix, bias_diff):
+    finetuned_patches = finetuned_model.get_key_patches(prefix)
+    original_patches = original_model.get_key_patches(prefix)
+
+    common_keys = set(finetuned_patches.keys()).intersection(original_patches.keys())
+    diff_sd = {}
+
+    for key in common_keys:
+        is_weight = key.endswith(".weight")
+        is_bias = key.endswith(".bias")
+
+        if not is_weight and not (bias_diff and is_bias):
+            continue
+
+        ft_tensor = _resolve_weight_from_patches(finetuned_patches[key], key)
+        orig_tensor = _resolve_weight_from_patches(original_patches[key], key)
+
+        diff_sd[key] = ft_tensor.sub(orig_tensor)
+
+    return diff_sd
+
 def extract_lora(diff, key, rank, algorithm, lora_type, lowrank_iters=7, adaptive_param=1.0, clamp_quantile=True):
     """
     Extracts LoRA weights from a weight difference tensor using SVD.
@@ -99,7 +144,8 @@ def extract_lora(diff, key, rank, algorithm, lora_type, lowrank_iters=7, adaptiv
     return (U, Vh)
 
 
-def calc_lora_model(model_diff, rank, prefix_model, prefix_lora, output_sd, lora_type, algorithm, lowrank_iters, out_dtype, bias_diff=False, adaptive_param=1.0, clamp_quantile=True):
+def calc_lora_model(model_diff, rank, prefix_model, prefix_lora, output_sd, lora_type, algorithm, lowrank_iters, out_dtype, bias_diff=False, adaptive_param=1.0, clamp_quantile=True, sd_override=None):
+    if sd_override is None:
         comfy.model_management.load_models_gpu([model_diff], force_patch_weights=True)
         model_diff.model.diffusion_model.cpu()
         sd = model_diff.model_state_dict(filter_prefix=prefix_model)
@@ -108,6 +154,8 @@ def calc_lora_model(model_diff, rank, prefix_model, prefix_lora, output_sd, lora
         for k, v in sd.items():
             if isinstance(v, torch.Tensor):
                 sd[k] = v.cpu()
+    else:
+        sd = sd_override
 
     # Get total number of keys to process for progress bar
     total_keys = len([k for k in sd if k.endswith(".weight") or (bias_diff and k.endswith(".bias"))])
@@ -183,6 +231,26 @@ class LoraExtractKJ:
             raise ValueError("svd_lowrank algorithm is only supported for standard LoRA extraction.")
 
         dtype = {"fp8_e4m3fn": torch.float8_e4m3fn, "bf16": torch.bfloat16, "fp16": torch.float16, "fp16_fast": torch.float16, "fp32": torch.float32}[output_dtype]
+
+        model_diff = None
+        sd_override = None
+
+        scaled_fp8_ft = getattr(getattr(finetuned_model.model, "model_config", None), "scaled_fp8", None)
+        scaled_fp8_orig = getattr(getattr(original_model.model, "model_config", None), "scaled_fp8", None)
+        scaled_fp8_present = scaled_fp8_ft is not None or scaled_fp8_orig is not None
+
+        if scaled_fp8_present:
+            comfy.model_management.load_models_gpu([finetuned_model, original_model], force_patch_weights=True)
+            logging.info(
+                "LoraExtractKJ: detected scaled fp8 weights (finetuned=%s, original=%s); using high-precision diff path.",
+                scaled_fp8_ft is not None,
+                scaled_fp8_orig is not None,
+            )
+            sd_override = _build_scaled_fp8_diff(
+                finetuned_model, original_model, "diffusion_model.", bias_diff
+            )
+            comfy.model_management.soft_empty_cache()
+        else:
             m = finetuned_model.clone()
             kp = original_model.get_key_patches("diffusion_model.")
             for k in kp:
@@ -194,6 +262,8 @@ class LoraExtractKJ:
         output_sd = {}
         if model_diff is not None:
             output_sd = calc_lora_model(model_diff, rank, "diffusion_model.", "diffusion_model.", output_sd, lora_type, algorithm, lowrank_iters, dtype, bias_diff=bias_diff, adaptive_param=adaptive_param, clamp_quantile=clamp_quantile)
+        elif sd_override is not None:
+            output_sd = calc_lora_model(None, rank, "diffusion_model.", "diffusion_model.", output_sd, lora_type, algorithm, lowrank_iters, dtype, bias_diff=bias_diff, adaptive_param=adaptive_param, clamp_quantile=clamp_quantile, sd_override=sd_override)
         if "adaptive" in lora_type:
             rank_str = f"{lora_type}_{adaptive_param:.2f}"
         else: