SaveWEBM - ComfyUI Built-in Node Documentation

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

The SaveWEBM node saves a sequence of images as a WEBM video file. It takes multiple input images and encodes them into a video using either VP9 or AV1 codec with configurable quality settings and frame rate. The resulting video file is saved to the output directory with metadata including prompt information.

Inputs

Parameter	Description	Data Type	Required	Range
images	RGBA images are saved with their alpha channel as transparency (vp9 codec only)	IMAGE	Yes	-
filename_prefix	Prefix for the output filename (default: “ComfyUI”)	STRING	No	-
codec	Video codec to use for encoding	COMBO	Yes	”vp9" "av1”
fps	Frame rate for the output video (default: 24.0)	FLOAT	No	0.01-1000.0
crf	Higher crf means lower quality with a smaller file size, lower crf means higher quality higher filesize (default: 32.0)	FLOAT	No	0-63.0

Note on alpha channel: The alpha channel from RGBA images is only preserved when using the VP9 codec. When using the AV1 codec, the alpha channel is ignored and only RGB data is encoded.

Outputs

Output Name	Description	Data Type
ui	Video preview showing the saved WEBM file	PREVIEW

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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