DumasNodes/README.md

DumasNodes

DumasNodes is a ComfyUI custom-node pack for generic utility workflows under the Dumas brand.

Included Nodes

• Dumas Image Compare

  • Inputs: optional image1, optional image2
  • Outputs: new image
  • Saves preview images for the built-in compare UI and passes through the second image when present, otherwise the first.
  • Bundles a js/ frontend extension so the compare viewer renders inside both classic ComfyUI and Nodes 2.0.

• Save Image Dumas

  • Inputs: images, folder, pattern, format, quality, embed_workflow, save_on_run, optional name, optional name_2
  • Output: none
  • Saves images to any folder, not just ComfyUI's output directory.
  • Supports filename tokens including %input%, %input2%, %date:yyyy-MM-dd%, %counter%, %width%, %height%, and %batch_num%.

• Load Images from Folder Dumas

  • Inputs: configured on-node via folder picker and image gallery
  • Outputs: image, mask, width, height, filename, index, total
  • Loads one or many images from any folder on disk as ComfyUI list outputs.
  • Supports manual picks, Select all, First N, and Select random so each run can choose one random image from the visible folder tree.

• Dumas H3 Plan Attach Scene Images

  • Inputs: plan, scene_index, optional image1..image9
  • Outputs: plan, connected_images
  • Attaches up to nine optional image sockets to one MiniMax H3 plan scene while keeping the plan JSON-serializable for the upstream archive system.
  • Chain one node per scene that needs its own nine-image bundle.

• Dumas H3 Plan Extract Scene Images

  • Inputs: plan, scene_index
  • Outputs: plan, image1..image9, connected_images
  • Reads back the nine optional images for a selected MiniMax H3 plan scene, for example by connecting the current clip_index.

• Dumas H3 Long Videos (FL2VA + REF2VA)

  • Inputs: H3 model stack, prompt socket, optional first_frame, optional ref_image_1..ref_image_9, plus the upstream long-video control surface for pacing, continuity, audio, overlays, and guards
  • Outputs: images, audio, info, script, frames_per_shot, total_frames, shots, video_seconds, fps, fps_int, latent, soundscape
  • First-pass Dumas port of the MiniMax-H3-Longvideos sampler, brought in as a local starting point for long-form H3 chaining work.
  • Keeps the upstream split-beats / handoff / ref-routing behavior close to source so future Dumas-specific improvements can be compared against a known baseline.
  • Prompt <Picture N> tags now map to the actual ref socket numbers you wire, even with gaps such as only ref_image_2 and ref_image_7 connected.

• Dumas H3 Shot Length

  • Inputs: shot_seconds, fps, optional cap_to_h3_max
  • Outputs: seconds, frames, info
  • Emits one H3-safe shot length as both seconds and a grid-aligned frame count for wiring into the long-video sampler and preview helpers.

• Dumas H3 Model Inspector

  • Input: model
  • Outputs: format, report
  • Reports the detected H3 base precision / quant format and the relevant compute-capability hints for the current card.

• Dumas Character Helper

  • Inputs: image1, image2, image1_picture_id, image2_picture_id, character_id, name, alias, gender, age, nationality, occupation, height_feet, height_inches, accent, general
  • Outputs: image1, image2, character_text
  • Passes both images through unchanged and builds a character reference string such as <Picture 2> and <Picture 3> reference the same character who is called Dave.
  • Collapses optional non-visual facts such as alias, gender, age, nationality, occupation, height, and accent into one comma-separated sentence, then ends with the freeform note as the final sentence when provided.

• Dumas JSON String to Object

  • Input: json_string
  • Output: parsed JSON
  • Use it to turn raw JSON text into a structured object.

• Dumas JSON Object to String

  • Inputs: json_object, pretty, sort_keys
  • Output: serialized STRING
  • Use it to compact or pretty-print JSON for prompts, logs, or file output.

• Dumas Strip Iteration Suffix

  • Input: filename
  • Output: cleaned STRING
  • Keeps only the part before the first underscore, for example asset_build_003.png -> asset.png and char123_pose.png -> char123.png.

• Dumas Slugify String

  • Input: text
  • Output: slug STRING
  • Converts text into a lowercase URL/file-safe slug, for example Crème brûlée 2026 -> creme-brulee-2026.

• Dumas JSON Get Value

  • Inputs: json_object, path
  • Output: JSON
  • Reads a nested value using dot paths like user.profile.name or items.0.id.

• Dumas JSON Set Value

  • Inputs: json_object, path, value_json
  • Output: updated JSON
  • Writes a parsed JSON value into a nested path without mutating the original object.

• Dumas JSON Has Key

  • Inputs: json_object, path
  • Output: BOOLEAN
  • Checks whether a nested path exists.

• Dumas JSON Remove Key

  • Inputs: json_object, path
  • Output: updated JSON
  • Removes a nested key or array item by path.

• Dumas JSON Pick Fields

  • Inputs: json_object, paths
  • Output: filtered JSON
  • Builds a new object from newline-separated paths that exist in the input.

• Dumas JSON Merge Objects

  • Inputs: base_object, overlay_object
  • Output: merged JSON
  • Deep-merges dictionaries so overlay values replace or extend the base object.

• Dumas JSON Keys

  • Input: json_object
  • Outputs: keys as JSON array, count as integer
  • Lists the top-level keys of an object and reports how many there are.

• Dumas JSON Array Length

  • Input: json_array
  • Output: INT
  • Returns the length of a JSON array.

• Dumas JSON Array Append

  • Inputs: json_array, value_json
  • Output: updated JSON
  • Appends a parsed JSON value to the end of an array.

• Dumas JSON Array Slice

  • Inputs: json_array, start, end, step
  • Output: sliced JSON
  • Returns an array slice. end=0 means "slice to the end".

• Dumas JSON Array Iterator

  • Inputs: json_input, index, mode
  • Outputs: item, current_index, total_items
  • Returns the current array item and position, with mode set to fixed, incr, or decr.

• Dumas JSON Object Iterator

  • Inputs: json_input, index, mode
  • Outputs: key, value, current_index, total_items
  • Returns the current object entry in insertion order, with mode set to fixed, incr, or decr.

• Dumas JSON Flatten

  • Input: json_input
  • Output: flat JSON
  • Flattens nested objects and arrays into dot-path keys.

• Dumas JSON Unflatten

  • Input: flat_json_object
  • Output: nested JSON
  • Rebuilds nested JSON from a flat dot-path object.

All nodes live in the Dumas/JSON category.

Installation

1. Change into your ComfyUI custom nodes directory:

   cd /path/to/ComfyUI/custom_nodes
   

2. Clone this repository:

   git clone https://git.dumas.ddns.net/chris.dumas/DumasNodes.git
   

3. Restart ComfyUI.

Usage

Use dot paths for nested access:

user.profile.name
items.0.id
settings.render.width

Dumas JSON Set Value expects value_json to be valid JSON, so strings should be quoted:

"Dumas"

{"enabled": true, "retries": 3}

Dumas JSON Pick Fields expects one path per line:

user.name
meta.active
items.0.id

Dumas JSON Array Slice treats end=0 as "use the rest of the array".

Dumas JSON Array Iterator clamps to valid bounds:

fixed -> use index as-is
incr  -> use index + 1
decr  -> use index - 1

Dumas JSON Object Iterator uses the same index rules and iterates object entries in their existing key order.

Dumas JSON Flatten and Dumas JSON Unflatten use the same dot-path format as the other path-based nodes.

Dumas Image Compare accepts one or two images. The new image socket forwards image2 when connected so you can keep the "after" image moving through the workflow, and falls back to image1 if only one input is present.

Save Image Dumas leaves folder empty to use ComfyUI's output directory. name feeds %input% and name_2 feeds %input2%, so a pattern like project/%input%_%input2%_%counter% can combine two upstream strings into the saved filename.

Dumas H3 Plan Attach Scene Images and Dumas H3 Plan Extract Scene Images are a companion pair for ComfyUI-MiniMaxH3-Contex-Loop and the local ref2v lane. The upstream H3 plan node cannot dynamically grow nine new image sockets for every JSON-defined scene, so Dumas stores scene image bindings beside the plan using a lightweight token and an in-memory registry. That keeps plan.json archiving intact while still letting you wire up nine IMAGE sockets per scene through chained helper nodes.

Dumas Character Helper lives in Dumas/String. Use the picture ID dropdowns to decide which <Picture N> tags get mentioned in the generated text, while the two IMAGE sockets continue downstream unchanged. The node is tuned for useful non-visible facts rather than visual descriptions already obvious from the reference images.

Dumas Strip Iteration Suffix keeps the part before the first underscore and drops the rest. Names like char123_pose_final.png become char123.png, while names with no underscore such as char123.png are left untouched.

Dumas Slugify String lowercases text, strips accents, replaces non-alphanumeric runs with -, and trims leading or trailing dashes.

Roadmap

This repo is intended to grow into a broader set of Dumas-branded generic utility nodes, including JSON helpers and adjacent data-manipulation tools.

License

MIT.