BriaVideoReplaceBackground - ComfyUI Built-in Node Documentation

Complete documentation for the BriaVideoReplaceBackground node in ComfyUI. Learn its inputs, outputs, parameters and usage.

This node replaces the background of a video with a supplied image or video using Bria’s API. The output keeps the foreground video’s resolution and frame rate; a background with a different aspect ratio is stretched to fit, so matching aspect ratios produces undistorted results.

Inputs

Parameter	Description	Data Type	Required	Range
video	Foreground video whose background is replaced.	VIDEO	Yes	-
background_image	Background image to composite behind the foreground. Provide either a background image or a background video, not both.	IMAGE	No	-
background_video	Background video to composite behind the foreground. Provide either a background image or a background video, not both.	VIDEO	No	-
seed	Seed controls whether the node should re-run; results are non-deterministic regardless of seed. (default: 0)	INT	Yes	0 to 2147483647

Note: You must provide exactly one of background_image or background_video — not both and not neither. The foreground video must be 60 seconds or shorter.

Outputs

Output Name	Description	Data Type
video	The resulting video with the background replaced.	VIDEO

This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! Edit on GitHub

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