Add a node to save animated webp.

comfy_extras/nodes_images.py

 import nodes
+import folder_paths
+from comfy.cli_args import args
+
+from PIL import Image
+import numpy as np
+import json
+import os
+
 MAX_RESOLUTION = nodes.MAX_RESOLUTION
 
 class ImageCrop:
@@ -38,7 +46,75 @@ class RepeatImageBatch:
         s = image.repeat((amount, 1,1,1))
         return (s,)
 
+class SaveAnimatedWEBP:
+    def __init__(self):
+        self.output_dir = folder_paths.get_output_directory()
+        self.type = "output"
+        self.prefix_append = ""
+
+    methods = {"default": 4, "fastest": 0, "slowest": 6}
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required":
+                    {"images": ("IMAGE", ),
+                     "filename_prefix": ("STRING", {"default": "ComfyUI"}),
+                     "fps": ("FLOAT", {"default": 6.0, "min": 0.01, "max": 1000.0, "step": 0.01}),
+                     "lossless": ("BOOLEAN", {"default": True}),
+                     "quality": ("INT", {"default": 80, "min": 0, "max": 100}),
+                     "method": (list(s.methods.keys()),),
+                     # "num_frames": ("INT", {"default": 0, "min": 0, "max": 8192}),
+                     },
+                "hidden": {"prompt": "PROMPT", "extra_pnginfo": "EXTRA_PNGINFO"},
+                }
+
+    RETURN_TYPES = ()
+    FUNCTION = "save_images"
+
+    OUTPUT_NODE = True
+
+    CATEGORY = "_for_testing"
+
+    def save_images(self, images, fps, filename_prefix, lossless, quality, method, num_frames=0, prompt=None, extra_pnginfo=None):
+        method = self.methods.get(method, "aoeu")
+        filename_prefix += self.prefix_append
+        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])
+        results = list()
+        pil_images = []
+        for image in images:
+            i = 255. * image.cpu().numpy()
+            img = Image.fromarray(np.clip(i, 0, 255).astype(np.uint8))
+            pil_images.append(img)
+
+        metadata = None
+        if not args.disable_metadata:
+            metadata = pil_images[0].getexif()
+            if prompt is not None:
+                metadata[0x0110] = "prompt:{}".format(json.dumps(prompt))
+            if extra_pnginfo is not None:
+                inital_exif = 0x010f
+                for x in extra_pnginfo:
+                    metadata[inital_exif] = "{}:{}".format(x, json.dumps(extra_pnginfo[x]))
+                    inital_exif -= 1
+
+        if num_frames == 0:
+            num_frames = len(pil_images)
+
+        c = len(pil_images)
+        for i in range(0, c, num_frames):
+            file = f"{filename}_{counter:05}_.webp"
+            pil_images[i].save(os.path.join(full_output_folder, file), save_all=True, duration=int(1000.0/fps), append_images=pil_images[i + 1:i + num_frames], exif=metadata, lossless=lossless, quality=quality, method=method)
+            results.append({
+                "filename": file,
+                "subfolder": subfolder,
+                "type": self.type
+            })
+            counter += 1
+
+        animated = num_frames != 1
+        return { "ui": { "images": results, "animated": (animated,) } }
+
 NODE_CLASS_MAPPINGS = {
     "ImageCrop": ImageCrop,
     "RepeatImageBatch": RepeatImageBatch,
+    "SaveAnimatedWEBP": SaveAnimatedWEBP,
 }

web/scripts/pnginfo.js

@@ -50,7 +50,6 @@ export function getPngMetadata(file) {
 function parseExifData(exifData) {
 	// Check for the correct TIFF header (0x4949 for little-endian or 0x4D4D for big-endian)
 	const isLittleEndian = new Uint16Array(exifData.slice(0, 2))[0] === 0x4949;
-	console.log(exifData);
 
 	// Function to read 16-bit and 32-bit integers from binary data
 	function readInt(offset, isLittleEndian, length) {
@@ -126,6 +125,9 @@ export function getWebpMetadata(file) {
 				const chunk_length = dataView.getUint32(offset + 4, true);
 				const chunk_type = String.fromCharCode(...webp.slice(offset, offset + 4));
 				if (chunk_type === "EXIF") {
+					if (String.fromCharCode(...webp.slice(offset + 8, offset + 8 + 6)) == "Exif\0\0") {
+						offset += 6;
+					}
 					let data = parseExifData(webp.slice(offset + 8, offset + 8 + chunk_length));
 					for (var key in data) {
 						var value = data[key];