ComfyUI Thumbnail Cycle Generator

A custom node for ComfyUI that triggers WinThumbsPreloader every X cycles to ensure Windows thumbnails are generated for your output folders.

Features

• Persistent Counter: Starts at 0 and increments every time the workflow runs.
• Cycle Control: Configurable number of runs before triggering the command.
• Windows Integration: Specifically designed to run WinThumbsPreloader.exe in silent mode.
• Path Resolution: Automatically uses the ComfyUI output directory and allows for a folder suffix.

Requirements

• Windows OS
• WinThumbsPreloader: Must be installed and available in your system's PATH. If it's not in your PATH, you may need to update the node code with the full absolute path to the executable.

Installation

1. Clone or download this repository into your ComfyUI/custom_nodes/ directory:

   cd ComfyUI/custom_nodes/
   git clone https://github.com/your-username/comfyui-thumb-generator
   

2. Restart ComfyUI.

Parameters

• cycle_time: (INT) How many times the node should run before triggering the command.
• folder_suffix: (STRING) Appended to the default ComfyUI output path (e.g., if you output to a specific subfolder).

Output

• current_count: (INT) Returns the current count (starting from 0).

How it works

Every time ComfyUI executes the workflow:

1. The internal counter increments.
2. If the counter matches cycle_time:
   • It calculates the full path: {ComfyUI_Output_Dir}/{folder_suffix}.
   • It runs: WinThumbsPreloader.exe -s {path}.
   • The counter resets to 0.
3. The node always reports it has "changed" to ensure it executes on every queue run.