FluxVideoUpscaleNode - ComfyUI Built-in Node Documentation

Flux Video Upscale upscales a video clip by 1.5 to 3 times using FLUX super-resolution. In creative mode it restores and invents fine detail; in precise mode it sharpens the source without changing it.

Inputs

Parameter	Description	Data Type	Required	Range
`video`	Source clip of 1 to 20 seconds with an aspect ratio between 1:4 and 4:1. The output is rendered at 24 fps and capped at about 14.4 megapixels per frame.	VIDEO	Yes	1 to 20 seconds duration; aspect ratio between 1:4 and 4:1; minimum 64x64 pixels
`upscale_factor`	Output size relative to the source. Very large sources are upscaled by less than the requested factor because of the per-frame cap. (default: 2.0)	FLOAT	Yes	1.5 to 3.0 (step 0.1)
`mode`	’creative’ restores and invents fine detail, best for generated footage, textures and scenery. ‘precise’ sharpens the source without changing it, for faces, products and real footage. (default: “creative”)	COMBO	Yes	”creative" "precise”
`prompt`	Optional description of the clip that steers the enhanced detail. Leave empty for a neutral upscale. (default: empty)	STRING	Yes	Multiline text
`auto_downscale`	Automatically downscale sources larger than 3840x2160 pixels in area to fit the input limit. Aspect ratio is preserved; smaller videos are untouched. (default: true)	BOOLEAN	Yes	true false
`safety_tolerance`	Moderation tolerance, 0 is the strictest. (default: 2, advanced parameter)	INT	Yes	0 to 4
`seed`	Seed to determine if node should re-run; FLUX picks its own seed, so actual results are nondeterministic regardless of this value. (default: 42)	INT	Yes	0 to 4294967295

Note: The source video must be between 1 and 20 seconds long and at least 64x64 pixels in size. If auto_downscale is disabled and the video area exceeds 3840x2160 pixels, the node raises an error. The output video is rendered at 24 fps and capped at about 14.4 megapixels per frame, so very large sources may be upscaled by less than the requested factor.

Outputs

Output Name	Description	Data Type
`video`	The upscaled video clip.	VIDEO

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Inputs

Outputs