calculate_framewindow.py

import math

class Calculate_Framewindow:
    """
    Computes: floor((length * float(framerate)) + 1)
    """

    @classmethod
    def INPUT_TYPES(cls):
        return {
            "required": {
                "length": ("FLOAT", {
                    "default": 1.0,
                    "min": 0.0,
                    "max": 1.0e9,
                    "step": 0.001,
                }),
                "framerate": ("INT", {
                    "default": 24,
                    "min": 1,
                    "max": 1000000,
                    "step": 1,
                }),
            }
        }

    RETURN_TYPES = ("INT",)
    RETURN_NAMES = ("result",)

    FUNCTION = "compute"
    CATEGORY = "math"

    def compute(self, length: float, framerate: int):
        framerate_f = float(framerate)  # explicit internal conversion as requested
        value = (length * framerate_f) + 1.0
        result = int(math.floor(value))  # round down
        return (result,)


NODE_CLASS_MAPPINGS = {
    "Calculate_Framewindow": Calculate_Framewindow
}

NODE_DISPLAY_NAME_MAPPINGS = {
    "Calculate_Framewindow": "Calculate_Framewindow"
}