Scale Batch Prompt Schedule (ScaleBatchPromptSchedule) - ComfyUI-KJNodes

The Scale Batch Prompt Schedule node parses the input string to identify keyframes defined in the format frame_number:(value) (e.g., 0:(0.0)). Multiple keyframes are separated by commas and line breaks.

The Scale Batch Prompt Schedule node is used to adjust a prompt schedule generated by Fizz's BatchPromptSchedule node to fit a new total frame count. Its core function is to remap the positions of keyframes within the schedule, thereby adapting the original animation prompt plan to video sequences of different lengths without altering the prompt content.

Node Function

This node parses the input string to identify keyframes defined in the format frame_number:(value) (e.g., 0:(0.0), 7:(1.0), 15:(0.0)). It then calculates a scaling factor based on the old and new total frame counts and uses this to recalculate the position of each keyframe on the new timeline. Finally, it outputs a string in the same format but with updated frame numbers for use by subsequent nodes.

Node Parameter Description - Scale Batch Prompt Schedule

Control Parameters (Parameters)

Parameter Name	Data Type	Required	Default Value	Range/Options	Description
`input_str`	STRING	Yes	`0:(0.0),\n7:(1.0),\n15:(0.0)\n`	-	input_str (Input Parameter): The original prompt schedule string to be scaled. The format must be `frame_number:(value)` with keyframes separated by commas and newlines (e.g., `0:(0.0),\n7:(1.0),\n15:(0.0)\n`).
`old_frame_count`	INT	Yes	1	1 - 4096 (Step: 1)	old_frame_count (Input Parameter): The total frame count corresponding to the original prompt schedule. The value range is 1 to 4096.
`new_frame_count`	INT	Yes	1	1 - 4096 (Step: 1)	new_frame_count (Input Parameter): The new total frame count to which the prompt schedule should be scaled. The value range is 1 to 4096.

Output

Parameter Name	Data Type	Description
STRING	STRING	STRING (Output Parameter): The output is the scaled new prompt schedule string.

Use Cases

This node is very useful when creating animated videos and needing to adjust the total frame count. For example, if you initially designed a prompt variation plan for a 30-frame animation but later decided to extend the animation to 60 frames, you can use this node to smoothly scale the original 30-frame plan to 60 frames without manually recalculating and entering the position of each keyframe.

Scale Batch Prompt Schedule Node Source Code Link

The Scale Batch Prompt Schedule node is from the ComfyUI-KJNodes node package.

Scale Batch Prompt Schedule(ScaleBatchPromptSchedule)