ByteDanceFirstLastFrameNode - ComfyUI Built-in Node Documentation - ComfyUI

This node generates a video using a text prompt along with first and last frame images. It takes your description and the two key frames to create a complete video sequence that transitions between them. The node provides various options to control the video’s resolution, aspect ratio, duration, and other generation parameters.

Inputs

Parameter	Description	Data Type	Required	Range
`model`	The model used for video generation (default: `"seedance-1-5-pro-251215"`).	COMBO	Yes	`"seedance-1-5-pro-251215"` `"seedance-1-0-pro-250528"`
`prompt`	The text prompt used to generate the video. Must not be empty and must not contain reserved parameter keywords (`resolution`, `ratio`, `duration`, `seed`, `camerafixed`, `watermark`).	STRING	Yes	-
`first_frame`	First frame to be used for the video. Must be between 300x300 and 6000x6000 pixels, with an aspect ratio between 0.4 and 2.5.	IMAGE	Yes	-
`last_frame`	Last frame to be used for the video. Must be between 300x300 and 6000x6000 pixels, with an aspect ratio between 0.4 and 2.5.	IMAGE	Yes	-
`resolution`	The resolution of the output video.	COMBO	Yes	`"480p"` `"720p"` `"1080p"`
`aspect_ratio`	The aspect ratio of the output video.	COMBO	Yes	`"adaptive"` `"16:9"` `"4:3"` `"1:1"` `"3:4"` `"9:16"` `"21:9"`
`duration`	The duration of the output video in seconds. When using `seedance-1-5-pro-251215`, the minimum duration is 4 seconds. (default: 5)	INT	Yes	3 - 12
`seed`	Seed to use for generation. (default: 0)	INT	No	0 - 2147483647
`camera_fixed`	Specifies whether to fix the camera. The platform appends an instruction to fix the camera to your prompt, but does not guarantee the actual effect. (default: False)	BOOLEAN	No	-
`watermark`	Whether to add an “AI generated” watermark to the video. (default: False)	BOOLEAN	No	-
`generate_audio`	This parameter is ignored for any model except `seedance-1-5-pro-251215`. (default: False)	BOOLEAN	No	-

Note: For the seedance-1-5-pro-251215 model, duration must be 4 seconds or greater. Both first_frame and last_frame must be between 300x300 and 6000x6000 pixels and have an aspect ratio between 0.4 and 2.5. The prompt is checked and rejected if it contains reserved parameter keywords.

Outputs

Output Name	Description	Data Type
`output`	The generated video file.	VIDEO

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