Add unfinished ImageOnlyCheckpointSave node to save a SVD checkpoint.

This node is unfinished, SVD checkpoints saved with this node will
work with ComfyUI but not with anything else.

comfy/clip_vision.py

-from .utils import load_torch_file, transformers_convert, common_upscale
+from .utils import load_torch_file, transformers_convert, common_upscale, state_dict_prefix_replace
 import os
 import torch
 import contextlib
@@ -41,9 +41,13 @@ class ClipVisionModel():
         self.model.eval()
 
         self.patcher = comfy.model_patcher.ModelPatcher(self.model, load_device=self.load_device, offload_device=offload_device)
+
     def load_sd(self, sd):
         return self.model.load_state_dict(sd, strict=False)
 
+    def get_sd(self):
+        return self.model.state_dict()
+
     def encode_image(self, image):
         comfy.model_management.load_model_gpu(self.patcher)
         pixel_values = clip_preprocess(image.to(self.load_device)).float()
@@ -76,6 +80,9 @@ def convert_to_transformers(sd, prefix):
             sd['visual_projection.weight'] = sd.pop("{}proj".format(prefix)).transpose(0, 1)
 
         sd = transformers_convert(sd, prefix, "vision_model.", 48)
+    else:
+        replace_prefix = {prefix: ""}
+        sd = state_dict_prefix_replace(sd, replace_prefix)
     return sd
 
 def load_clipvision_from_sd(sd, prefix="", convert_keys=False):

comfy/model_base.py

@@ -179,19 +179,28 @@ class BaseModel(torch.nn.Module):
     def process_latent_out(self, latent):
         return self.latent_format.process_out(latent)
 
-    def state_dict_for_saving(self, clip_state_dict, vae_state_dict):
-        clip_state_dict = self.model_config.process_clip_state_dict_for_saving(clip_state_dict)
+    def state_dict_for_saving(self, clip_state_dict=None, vae_state_dict=None, clip_vision_state_dict=None):
+        extra_sds = []
+        if clip_state_dict is not None:
+            extra_sds.append(self.model_config.process_clip_state_dict_for_saving(clip_state_dict))
+        if vae_state_dict is not None:
+            extra_sds.append(self.model_config.process_vae_state_dict_for_saving(vae_state_dict))
+        if clip_vision_state_dict is not None:
+            extra_sds.append(self.model_config.process_clip_vision_state_dict_for_saving(clip_vision_state_dict))
+
         unet_state_dict = self.diffusion_model.state_dict()
         unet_state_dict = self.model_config.process_unet_state_dict_for_saving(unet_state_dict)
-        vae_state_dict = self.model_config.process_vae_state_dict_for_saving(vae_state_dict)
+
         if self.get_dtype() == torch.float16:
-            clip_state_dict = utils.convert_sd_to(clip_state_dict, torch.float16)
-            vae_state_dict = utils.convert_sd_to(vae_state_dict, torch.float16)
+            extra_sds = map(lambda sd: utils.convert_sd_to(sd, torch.float16), extra_sds)
 
         if self.model_type == ModelType.V_PREDICTION:
             unet_state_dict["v_pred"] = torch.tensor([])
 
-        return {**unet_state_dict, **vae_state_dict, **clip_state_dict}
+        for sd in extra_sds:
+            unet_state_dict.update(sd)
+
+        return unet_state_dict
 
     def set_inpaint(self):
         self.inpaint_model = True

comfy/sd.py

@@ -534,7 +534,14 @@ def load_unet(unet_path):
         raise RuntimeError("ERROR: Could not detect model type of: {}".format(unet_path))
     return model
 
-def save_checkpoint(output_path, model, clip, vae, metadata=None):
-    model_management.load_models_gpu([model, clip.load_model()])
-    sd = model.model.state_dict_for_saving(clip.get_sd(), vae.get_sd())
+def save_checkpoint(output_path, model, clip=None, vae=None, clip_vision=None, metadata=None):
+    clip_sd = None
+    load_models = [model]
+    if clip is not None:
+        load_models.append(clip.load_model())
+        clip_sd = clip.get_sd()
+
+    model_management.load_models_gpu(load_models)
+    clip_vision_sd = clip_vision.get_sd() if clip_vision is not None else None
+    sd = model.model.state_dict_for_saving(clip_sd, vae.get_sd(), clip_vision_sd)
     comfy.utils.save_torch_file(sd, output_path, metadata=metadata)

comfy/supported_models_base.py

@@ -65,6 +65,12 @@ class BASE:
         replace_prefix = {"": "cond_stage_model."}
         return utils.state_dict_prefix_replace(state_dict, replace_prefix)
 
+    def process_clip_vision_state_dict_for_saving(self, state_dict):
+        replace_prefix = {}
+        if self.clip_vision_prefix is not None:
+            replace_prefix[""] = self.clip_vision_prefix
+        return utils.state_dict_prefix_replace(state_dict, replace_prefix)
+
     def process_unet_state_dict_for_saving(self, state_dict):
         replace_prefix = {"": "model.diffusion_model."}
         return utils.state_dict_prefix_replace(state_dict, replace_prefix)

comfy_extras/nodes_model_merging.py

@@ -119,6 +119,48 @@ class ModelMergeBlocks:
             m.add_patches({k: kp[k]}, 1.0 - ratio, ratio)
         return (m, )
 
+def save_checkpoint(model, clip=None, vae=None, clip_vision=None, filename_prefix=None, output_dir=None, prompt=None, extra_pnginfo=None):
+    full_output_folder, filename, counter, subfolder, filename_prefix = folder_paths.get_save_image_path(filename_prefix, output_dir)
+    prompt_info = ""
+    if prompt is not None:
+        prompt_info = json.dumps(prompt)
+
+    metadata = {}
+
+    enable_modelspec = True
+    if isinstance(model.model, comfy.model_base.SDXL):
+        metadata["modelspec.architecture"] = "stable-diffusion-xl-v1-base"
+    elif isinstance(model.model, comfy.model_base.SDXLRefiner):
+        metadata["modelspec.architecture"] = "stable-diffusion-xl-v1-refiner"
+    else:
+        enable_modelspec = False
+
+    if enable_modelspec:
+        metadata["modelspec.sai_model_spec"] = "1.0.0"
+        metadata["modelspec.implementation"] = "sgm"
+        metadata["modelspec.title"] = "{} {}".format(filename, counter)
+
+    #TODO:
+    # "stable-diffusion-v1", "stable-diffusion-v1-inpainting", "stable-diffusion-v2-512",
+    # "stable-diffusion-v2-768-v", "stable-diffusion-v2-unclip-l", "stable-diffusion-v2-unclip-h",
+    # "v2-inpainting"
+
+    if model.model.model_type == comfy.model_base.ModelType.EPS:
+        metadata["modelspec.predict_key"] = "epsilon"
+    elif model.model.model_type == comfy.model_base.ModelType.V_PREDICTION:
+        metadata["modelspec.predict_key"] = "v"
+
+    if not args.disable_metadata:
+        metadata["prompt"] = prompt_info
+        if extra_pnginfo is not None:
+            for x in extra_pnginfo:
+                metadata[x] = json.dumps(extra_pnginfo[x])
+
+    output_checkpoint = f"{filename}_{counter:05}_.safetensors"
+    output_checkpoint = os.path.join(full_output_folder, output_checkpoint)
+
+    comfy.sd.save_checkpoint(output_checkpoint, model, clip, vae, clip_vision, metadata=metadata)
+
 class CheckpointSave:
     def __init__(self):
         self.output_dir = folder_paths.get_output_directory()
@@ -137,46 +179,7 @@ class CheckpointSave:
     CATEGORY = "advanced/model_merging"
 
     def save(self, model, clip, vae, filename_prefix, prompt=None, extra_pnginfo=None):
-        full_output_folder, filename, counter, subfolder, filename_prefix = folder_paths.get_save_image_path(filename_prefix, self.output_dir)
-        prompt_info = ""
-        if prompt is not None:
-            prompt_info = json.dumps(prompt)
-
-        metadata = {}
-
-        enable_modelspec = True
-        if isinstance(model.model, comfy.model_base.SDXL):
-            metadata["modelspec.architecture"] = "stable-diffusion-xl-v1-base"
-        elif isinstance(model.model, comfy.model_base.SDXLRefiner):
-            metadata["modelspec.architecture"] = "stable-diffusion-xl-v1-refiner"
-        else:
-            enable_modelspec = False
-
-        if enable_modelspec:
-            metadata["modelspec.sai_model_spec"] = "1.0.0"
-            metadata["modelspec.implementation"] = "sgm"
-            metadata["modelspec.title"] = "{} {}".format(filename, counter)
-
-        #TODO:
-        # "stable-diffusion-v1", "stable-diffusion-v1-inpainting", "stable-diffusion-v2-512",
-        # "stable-diffusion-v2-768-v", "stable-diffusion-v2-unclip-l", "stable-diffusion-v2-unclip-h",
-        # "v2-inpainting"
-
-        if model.model.model_type == comfy.model_base.ModelType.EPS:
-            metadata["modelspec.predict_key"] = "epsilon"
-        elif model.model.model_type == comfy.model_base.ModelType.V_PREDICTION:
-            metadata["modelspec.predict_key"] = "v"
-
-        if not args.disable_metadata:
-            metadata["prompt"] = prompt_info
-            if extra_pnginfo is not None:
-                for x in extra_pnginfo:
-                    metadata[x] = json.dumps(extra_pnginfo[x])
-
-        output_checkpoint = f"{filename}_{counter:05}_.safetensors"
-        output_checkpoint = os.path.join(full_output_folder, output_checkpoint)
-
-        comfy.sd.save_checkpoint(output_checkpoint, model, clip, vae, metadata=metadata)
+        save_checkpoint(model, clip=clip, vae=vae, filename_prefix=filename_prefix, output_dir=self.output_dir, prompt=prompt, extra_pnginfo=extra_pnginfo)
         return {}
 
 class CLIPSave:

comfy_extras/nodes_video_model.py

@@ -3,6 +3,7 @@ import torch
 import comfy.utils
 import comfy.sd
 import folder_paths
+import comfy_extras.nodes_model_merging
 
 
 class ImageOnlyCheckpointLoader:
@@ -78,10 +79,26 @@ class VideoLinearCFGGuidance:
         m.set_model_sampler_cfg_function(linear_cfg)
         return (m, )
 
+class ImageOnlyCheckpointSave(comfy_extras.nodes_model_merging.CheckpointSave):
+    CATEGORY = "_for_testing"
+
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required": { "model": ("MODEL",),
+                              "clip_vision": ("CLIP_VISION",),
+                              "vae": ("VAE",),
+                              "filename_prefix": ("STRING", {"default": "checkpoints/ComfyUI"}),},
+                "hidden": {"prompt": "PROMPT", "extra_pnginfo": "EXTRA_PNGINFO"},}
+
+    def save(self, model, clip_vision, vae, filename_prefix, prompt=None, extra_pnginfo=None):
+        comfy_extras.nodes_model_merging.save_checkpoint(model, clip_vision=clip_vision, vae=vae, filename_prefix=filename_prefix, output_dir=self.output_dir, prompt=prompt, extra_pnginfo=extra_pnginfo)
+        return {}
+
 NODE_CLASS_MAPPINGS = {
     "ImageOnlyCheckpointLoader": ImageOnlyCheckpointLoader,
     "SVD_img2vid_Conditioning": SVD_img2vid_Conditioning,
     "VideoLinearCFGGuidance": VideoLinearCFGGuidance,
+    "ImageOnlyCheckpointSave": ImageOnlyCheckpointSave,
 }
 
 NODE_DISPLAY_NAME_MAPPINGS = {