BerriAI/litellm · error · ValueError

Unsupported image type: {type(image)}

Error message

Unsupported image type: {type(image)}

What it means

Error "Unsupported image type: {type(image)}" thrown in BerriAI/litellm.

Source

Thrown at litellm/llms/azure_ai/image_edit/flux2_transformation.py:141

        return request_body, []

    def _convert_image_to_base64(self, image: Any) -> str:
        """Convert image file to base64 string"""
        # Handle list of images (take first one)
        if isinstance(image, list):
            if len(image) == 0:
                raise ValueError("Empty image list provided")
            image = image[0]

        if isinstance(image, BufferedReader):
            image_bytes = image.read()
            image.seek(0)  # Reset file pointer for potential reuse
        elif isinstance(image, bytes):
            image_bytes = image
        elif hasattr(image, "read"):
            image_bytes = image.read()
        else:
            raise ValueError(f"Unsupported image type: {type(image)}")

        return base64.b64encode(image_bytes).decode("utf-8")

    def get_complete_url(
        self,
        model: str,
        api_base: str | None,
        litellm_params: dict,
    ) -> str:
        """
        Constructs a complete URL for Azure AI Foundry FLUX 2 image edits.

        Uses the same /providers/blackforestlabs/v1/flux-2-pro endpoint as image generation.
        """
        api_base = AzureFoundryModelInfo.get_api_base(api_base)

        if api_base is None:
            raise ValueError(

View on GitHub (pinned to 6c2dcb801b)

Solutions

1. Pass the image as bytes, a file-like object, or a supported type.

When it happens

Trigger: Thrown at litellm/llms/azure_ai/image_edit/flux2_transformation.py:141 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of BerriAI/litellm@6c2dcb801b (2026-08-15). Data as JSON: /api/errors/ace3b71786dd0aaf. Report an issue: GitHub.