keras-team/keras · error · ValueError

`cropping` parameter of `Cropping1D` layer must be smaller t

Error message

`cropping` parameter of `Cropping1D` layer must be smaller than the input length. Received: inputs.shape={inputs.shape}, cropping={self.cropping}

What it means

Error "`cropping` parameter of `Cropping1D` layer must be smaller than the input length. Received: inputs.shape={inputs.shape}, cropping={self.cropping}" thrown in keras-team/keras.

Source

Thrown at keras/src/layers/reshaping/cropping1d.py:69

    def compute_output_shape(self, input_shape):
        if input_shape[1] is not None:
            length = input_shape[1] - self.cropping[0] - self.cropping[1]
            if length <= 0:
                raise ValueError(
                    "`cropping` parameter of `Cropping1D` layer must be "
                    "smaller than the input length. Received: input_shape="
                    f"{input_shape}, cropping={self.cropping}"
                )
        else:
            length = None
        return (input_shape[0], length, input_shape[2])

    def call(self, inputs):
        if (
            inputs.shape[1] is not None
            and sum(self.cropping) >= inputs.shape[1]
        ):
            raise ValueError(
                "`cropping` parameter of `Cropping1D` layer must be "
                "smaller than the input length. Received: inputs.shape="
                f"{inputs.shape}, cropping={self.cropping}"
            )
        if self.cropping[1] == 0:
            return inputs[:, self.cropping[0] :, :]
        else:
            return inputs[:, self.cropping[0] : -self.cropping[1], :]

    def get_config(self):
        config = {"cropping": self.cropping}
        base_config = super().get_config()
        return {**base_config, **config}

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/layers/reshaping/cropping1d.py:69 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of keras-team/keras@7a34a03db6 (2026-08-25). Data as JSON: /api/errors/0adfa0e9b51ceb32. Report an issue: GitHub.