Applying a custom name format to file?

[MoltenMonster]

I want all my save images to be named like so: nth-image time seed Example: 009 19-54-36 659587304346209, the 9th image in the folder generated at 7:54:36PM with seed 659587304346209 in that specific order, I can't do that with the default image save node. I couldn't find any 3rd party nodes to do so.

[RichardAblitt]

Save Image Extended should be able to do that. https://github.com/audioscavenger/save-image-extended-comfyui

[aniruddhaadak80]

From my point of view, custom naming belongs in a templated output policy rather than scattered one-off nodes, because sequence number, timestamp, and seed are all stable concepts users will want to combine in different orders. Once people start post-processing files just to rename them, that is a sign the save layer is too rigid.

Even a small token-based format string with zero-padding support would probably solve most of this cleanly.

[MoltenMonster]

I ended up writing my own node for it, based on the built in SaveImage node:

from PIL import Image
from PIL.PngImagePlugin import PngInfo
from comfy.cli_args import args
import folder_paths
import numpy as np
import json
import os

class MySaveImage:
    def __init__(self):
        self.output_dir = folder_paths.get_output_directory()
        self.type = "output"
        self.prefix_append = ""
        self.compress_level = 4

    u/classmethod
    def INPUT_TYPES(s):
        return {
            "required": {
                "images": ("IMAGE", {"tooltip": "The images to save."}),
                "filename_prefix": ("STRING", {"default": "ComfyUI", "tooltip": "The prefix for the file to save. This may include formatting information such as %date:yyyy-MM-dd% or %Empty Latent Image.width% to include values from nodes."}),
                "seed": ("INT", {"default": 0, "min": 0, "max": 0xffffffffffffffff})
            },
            "hidden": {
                "prompt": "PROMPT", "extra_pnginfo": "EXTRA_PNGINFO"
            },
        }

    RETURN_TYPES = ()
    FUNCTION = "save_images"

    OUTPUT_NODE = True

    CATEGORY = "image"
    ESSENTIALS_CATEGORY = "Basics"
    DESCRIPTION = "Saves the input images to your ComfyUI output directory."
    SEARCH_ALIASES = ["save", "save image", "export image", "output image", "write image", "download"]

    def save_images(self, images, filename_prefix, seed, prompt=None, extra_pnginfo=None):
        filename_prefix += self.prefix_append
        print(self.output_dir)
        full_output_folder, filename, counter, subfolder, filename_prefix = folder_paths.get_save_image_path(filename_prefix, self.output_dir, images[0].shape[1], images[0].shape[0])
        counter = len([name for name in os.listdir(self.output_dir) if os.path.isfile(os.path.join(self.output_dir, name))])
        results = list()
        for (batch_number, image) in enumerate(images):
            i = 255. * image.cpu().numpy()
            img = Image.fromarray(np.clip(i, 0, 255).astype(np.uint8))
            metadata = None
            if not args.disable_metadata:
                metadata = PngInfo()
                if prompt is not None:
                    metadata.add_text("prompt", json.dumps(prompt))
                if extra_pnginfo is not None:
                    for x in extra_pnginfo:
                        metadata.add_text(x, json.dumps(extra_pnginfo[x]))

            filename_with_batch_num = filename.replace("%batch_num%", str(batch_number))
            file = f"{counter:03} {filename_with_batch_num} {seed}.png"
            img.save(os.path.join(full_output_folder, file), pnginfo=metadata, compress_level=self.compress_level)
            results.append({
                "filename": file,
                "subfolder": subfolder,
                "type": self.type
            })
            counter += 1

        return { "ui": { "images": results } }

# A dictionary that contains all nodes you want to export with their names
# NOTE: names should be globally unique
NODE_CLASS_MAPPINGS = {
    "MySaveImage": MySaveImage
}

# A dictionary that contains the friendly/humanly readable titles for the nodes
NODE_DISPLAY_NAME_MAPPINGS = {
    "MySaveImage": "My Save Image"
}