ComfyUI Video Resolution

A simple ComfyUI node for selecting video resolutions. Outputs width and height for video generation models like LTX, CogVideo, Hunyuan, and others.

Installation

Option 1: ComfyUI Manager

Search for "Video Resolution" in ComfyUI Manager and install.

Option 2: Manual

cd ComfyUI/custom_nodes
git clone https://github.com/hyukudan/comfyui-video-resolution.git

Restart ComfyUI after installation.

Usage

Search for "Video Resolution" in the node menu (or use aliases: "video size", "ltx resolution", "ltx2").

Inputs

Parameter	Description
resolution	Preset: 480p, 720p, 1080p, 1440p (2K), 2160p (4K), 4320p (8K), or Custom
aspect_ratio	1:1, 16:9, 19:9, 2.39:1, 9:16, 4:3, 5:4, 3:4, 4:5, 21:9, 9:21, 3:2, 2:3
scale	Multiply resolution: 0.25x, 0.5x, 0.75x, 1x, 1.25x, 1.5x, 2x
model_profile	Applies recommended sizing rules for common video models. Custom leaves divisible_by and add_one untouched
custom_mode	In Custom: manual uses width+height as-is, from_width recalculates height from aspect_ratio, from_height recalculates width
custom_width	Custom width reference value
custom_height	Custom height reference value
divisible_by	Ensure dimensions are divisible by: 8, 16, 32, or 64
rounding_mode	Quantization mode for divisibility: floor, nearest, or ceil
add_one	Add +1 to dimensions when the target model really requires it
swap	Swap width and height

Outputs

Output	Type	Description
width	INT	Width in pixels
height	INT	Height in pixels
resolution_str	STRING	Resolution as text (e.g., "1281x721")

Resolution Examples (with add_one=True)

Preset	1:1	16:9	9:16
480p	481x481	833x481	481x833
720p	705x705	1281x705	705x1249
1080p	1057x1057	1921x1057	1057x1889
4K	2145x2145	3841x2145	2145x3809

Values shown with divisible_by=32, add_one=True (legacy LTX-style sizing).

Custom Mode Notes

• resolution = Custom + custom_mode = manual: the node uses custom_width and custom_height directly.
• resolution = Custom + custom_mode = from_width: changing aspect_ratio now updates the height.
• resolution = Custom + custom_mode = from_height: changing aspect_ratio now updates the width.
• If resolution is not Custom, custom_width and custom_height are ignored.
• If you want the closest valid size instead of always rounding down, use rounding_mode = nearest.

Model Profiles

• LTX Video / LTX2: forces divisible_by = 64 and add_one = False for compatibility with the ComfyUI-LTXVideo workflows in this repo
• CogVideoX: forces divisible_by = 16 and add_one = False
• Hunyuan Video: forces divisible_by = 16 and add_one = False
• Mochi: forces divisible_by = 64 and add_one = False
• Wan 2.x: forces divisible_by = 16 and add_one = False
• Custom: respects the values you set manually

Model Recommendations

Model	divisible_by	add_one
LTX Video / LTX2	64	False
CogVideoX	16	False
Hunyuan Video	16	False
Mochi	64	False
Wan 2.x	16	False

License

MIT License