ComfyUI-WanResolutions

ComfyUI Video Resolutions

ComfyUI custom nodes that output width and height presets for Wan 2.2, MiniMax H3, and LTX video generation.

Nodes

WanResolutions

• Lets you choose an aspect_ratio and resolution quality tier (Fast Draft, Preview, High Detail, Wan 2.2 Native)
• Outputs INT values: width, height
• All sizes are divisible by 16 — the real alignment requirement for the Wan 2.2 A14B T2V/I2V models (8× VAE stride × 2× DiT patch), so no rounding flag is needed
• Wan 2.2 Native matches what the model actually targets (e.g. 16:9 → 1280×720); the lower tiers are faster, lower-area conveniences
• Optional IMAGE input auto-matches the closest supported aspect ratio as an override
• Optional official_only restricts output to Wan's four official CLI buckets (1280×720 / 720×1280 / 832×480 / 480×832). Enabling it swaps the resolution dropdown to show just the two official sizes for the current orientation (480P / 720P), so it's clear what is being filtered out; the current tier is mapped to the nearest bucket by area
• Keeps equivalent quality tier when you switch aspect ratios in the UI

LTXResolutions

• Uses the same aspect-ratio workflow as WanResolutions
• Uses dimensions divisible by 32
• Adds image_bypass so a connected IMAGE input can be ignored when needed
• Adds upscaler_power options for none, x1.5, and x2; upscale modes output the lower base resolution needed to reach the selected target tier
• The upscaler_power combo accepts a direct connection from the LTX Upscaler Power support node or any compatible generic/combo switch
• Preset tiers are tuned around current LTX 2.3 guidance:
  • official fast-iteration aspect sizes such as 640×640, 512×768, 768×512, 512×704, and 704×512
  • the documented two-stage workflow, where lower preview passes feed higher output tiers
  • the current official landscape workflow pair of 960×544 base resolution and 1920×1088 x2 output
  • 720p / 1080p-class output targets, snapped to legal multiples of 32 and adapted per aspect ratio

MiniMax H3 Resolutions

• Uses MiniMax H3's official T2V aspect ratios: 21:9, 16:9, 4:3, 1:1, 3:4, and 9:16
• Provides eight useful area buckets: 0.25 MP, 0.40 MP, 1K, 0.90 MP (720p class), 1 MP, 1.5K, 2.00 MP (1080p class), and 2K
• Includes the official ComfyUI fast-preview anchor (16:9 at 0.40 MP → 864×480) and base-quality anchor (16:9 near 1 MP → 1344×768)
• Uses dimensions divisible by 32, matching H3's effective transformer grid
• Without an IMAGE, outputs the selected T2V aspect-ratio preset
• With an IMAGE, switches to adaptive I2V sizing: it preserves the source image's ratio, targets the selected bucket's pixel area, and rounds both dimensions to the nearest multiple of 32
• At 16:9, the 0.90 MP and 2.00 MP buckets produce the H3-legal neighbors 1280×736 and 1920×1088; other ratios receive area-equivalent sizes

LTX Upscaler Power

• Outputs a connectable COMBO value: none, x1.5, or x2
• Connects directly to the LTXResolutions.upscaler_power combo, or can pass through a compatible generic/combo switch first

Supported aspect ratios for WanResolutions and LTXResolutions:

• 1:1
• 2:3
• 3:2
• 3:4
• 4:3
• 9:16
• 16:9

MiniMax H3 Resolutions uses the official H3 T2V set:

• 1:1
• 3:4
• 4:3
• 9:16
• 16:9
• 21:9

Installation

Clone into your ComfyUI custom_nodes directory:

cd ComfyUI/custom_nodes
git clone https://github.com/boobkake22/ComfyUI-WanResolutions.git

Restart ComfyUI after installing.

Usage

1. Add WanResolutions, MiniMax H3 Resolutions, or LTXResolutions.
2. Pick aspect_ratio and resolution.
3. Optional: for WanResolutions, enable official_only to force one of Wan's four official buckets.
4. Optional: connect an IMAGE input. The H3 node preserves its exact aspect ratio with smart area sizing; the other nodes auto-select the nearest supported ratio.
5. Optional: on LTXResolutions, enable image_bypass to ignore the connected IMAGE.
6. Optional: select an upscaler_power, or connect LTX Upscaler Power directly to the upscaler_power combo.
7. Connect width and height outputs to your downstream nodes.

Notes

• The LTX presets follow current LTX 2.3 notes rather than older 0.9.x guidance. The documented anchor sizes are 640×640, 512×768, 768×512, 512×704, and 704×512. Current official ComfyUI workflows use 960×544 before x2 spatial upscaling and 1920×1088 afterward.
• Upscaler modes treat the selected preset as the desired final target, round it upward to a factor-compatible legal size when necessary, and output a base resolution divisible by 32.
• WanResolutions sizes are derived from Wan 2.2 A14B's true 16-pixel alignment grid: dense aspect ratios (1:1, 2:3, 3:2, 3:4, 4:3) land on exact ratios, and 16:9 / 9:16 sit within ~0.6% (sub-pixel) while keeping an even area ladder. Wan 2.2 Native reproduces the sizes Wan's own pipeline emits.
• MiniMax documents the open H3 Base model as a 768p stage. Its official 2K result uses a separate in-context regeneration stage that is not yet open-sourced. This node's 2K entry supplies a direct, 32-aligned canvas size for local experimentation; it does not reproduce the unavailable H3-Regenerate-2K process.

License

Apache-2.0. See LICENSE.