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_1..ref_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.
- Full user guide: H3_LONG_VIDEOS_GUIDE.md
- Only the canonical DumasH3LongVideos node key is exposed now; the older FL2VA/REF2VA alias entries are no longer duplicated in the Add Node menu.
- Prompt <Picture N> tags now map to the actual ref socket numbers you wire, even with gaps such as only ref_2 and ref_7 connected.
- Character refs now contribute appearance and wardrobe context from the same structured object, while location refs contribute environment context from theirs.
- The default ref2v bias is now stronger: ref_mode defaults to auto ref2v so untagged prompts condition every shot instead of only shot 1, and ref_noise_aug defaults to 0.95 rather than the upstream-literal 0.999.
- Dumas H3 Latent Upscale Params provides the optional pre-decode latent refinement stage for the long-video node.
- Per-shot directives now support continuity:, ref_mode:, ref_noise_aug:, anchor_add:, soundscape:, and music: in addition to the existing timing and wardrobe directives.
Dumas H3 Latent Upscale Params
- Inputs: mode, model_name, method, width, height, device, precision, sampler_name, scheduler, steps, denoise, megapixels
- Output: latent_upscale_param
- Bundles the optional latent-space upscaler settings used by Dumas H3 Long Videos before decode, so the main node can rebuild conditioning at the target size and run a short refinement pass with your chosen sampler, scheduler, step count, and denoise.
Dumas H3 Beat Prompt
- Inputs: authored through the custom front-end beat editor
- Output: prompt
- Builds one H3 prompt block per beat, with quick controls for per-shot timing, continuity, ref behavior, anchor additions, soundscape, and music while staying compatible with direct text editing.
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 Reference
- Inputs: image, character_id, name, alias, gender, age, nationality, occupation, height_feet, height_inches, accent, description, general, wardrobe
- Output: reference
- Builds one structured REFERENCE object carrying the conditioning image, identity description, wardrobe, general notes, and simple facts together.
Dumas Location Reference
- Inputs: image, location_id, name, alias, description, general
- Output: reference
- Builds one structured REFERENCE object for a location/environment so H3 can use the same socket type for both character and scenic refs.
Dumas Anchor Style
- Inputs: anchor_style, style_description
- Output: anchor
- Offers a large preset dropdown of anchor-style titles such as cinematic action movie, comedy, found footage, 90s sitcom, mobile/cell phone captured, news broadcast, mockumentary, heist thriller, cyberpunk neon, nature documentary, courtroom drama, and more.
- The preset wording is tuned for H3-safe persistent anchors: camera language, lighting, texture, production treatment, and tone, without naming characters or describing one-off actions.
- Selecting a preset fills the editable description field, and the edited multiline description is the STRING value passed downstream into H3 anchor sockets such as anchor_override.
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

Change into your ComfyUI custom nodes directory:
```
cd /path/to/ComfyUI/custom_nodes
```

Clone this repository:

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

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 Reference and Dumas Location Reference live in Dumas/MiniMax. Both output a structured REFERENCE object that carries the image plus its semantic payload. Dumas H3 Long Videos accepts those REFERENCE sockets directly on ref_1..ref_9, resolves <Picture N> against the wired slot positions, and can also pull character wardrobe context from the structured ref data when character_memory is left blank.

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.