Comfy-Org/ComfyUI · error · ValueError

SeedVR2PostProcessing: unknown color_correction_method {colo

Error message

SeedVR2PostProcessing: unknown color_correction_method {color_correction_method!r}

What it means

SeedVR2PostProcessing dispatches on the color_correction_method string: 'lab', 'wavelet', 'adain', and 'none' are implemented. Any other value falls into the final else and raises this error naming the unknown method. It is a strict enum check — there is no silent default.

Source

Thrown at comfy_extras/nodes_seedvr.py:213

        target_w = min(decoded_5d.shape[3], reference_w)
        decoded_5d = decoded_5d[:, :, :target_h, :target_w, :]
        if color_correction_method in ("lab", "wavelet", "adain"):
            reference_5d = reference_full[:b, :t, :, :, :]
            reference_5d = cls._resize_reference(reference_5d, target_h, target_w)
            output_device = decoded_5d.device
            decoded_raw = cls._to_seedvr2_raw(decoded_5d)
            reference_raw = cls._to_seedvr2_raw(reference_5d)
            decoded_flat = decoded_raw.permute(0, 1, 4, 2, 3).reshape(b * t, decoded_raw.shape[4], target_h, target_w)
            reference_flat = reference_raw.permute(0, 1, 4, 2, 3).reshape(b * t, reference_raw.shape[4], target_h, target_w)
            output = cls._color_transfer_chunked(
                decoded_flat, reference_flat, output_device, color_correction_method,
            )
            output = output.reshape(b, t, output.shape[1], output.shape[2], output.shape[3]).permute(0, 1, 3, 4, 2)
            output = output.add(1.0).div(2.0).clamp(0.0, 1.0)
        elif color_correction_method == "none":
            output = decoded_5d
        else:
            raise ValueError(f"SeedVR2PostProcessing: unknown color_correction_method {color_correction_method!r}")

        if alpha_input is not None:
            alpha_5d, _ = cls._as_bthwc(alpha_input)
            alpha_5d = alpha_5d[:output.shape[0], :output.shape[1], :output.shape[2], :output.shape[3], :]
            output = torch.cat([output, alpha_5d.to(dtype=output.dtype, device=output.device)], dim=-1)
        h2 = output.shape[-3] - (output.shape[-3] % 2)
        w2 = output.shape[-2] - (output.shape[-2] % 2)
        output = output[:, :, :h2, :w2, :]
        if decoded_was_4d:
            output = output.reshape(-1, output.shape[-3], output.shape[-2], output.shape[-1])
        return io.NodeOutput(output)

    @staticmethod
    def _as_bthwc(images):
        if images.ndim == 4:
            return images.unsqueeze(0), True
        if images.ndim == 5:
            return images, False

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Set color_correction_method to one of: 'lab', 'wavelet', 'adain', 'none'.
2. Check the workflow JSON for stale values (case-sensitive, no surrounding whitespace) and re-save from the UI.
3. If a custom frontend supplies the value, validate it against the allowed set before queueing the prompt.

Example fix

# before
{"color_correction_method": "LAB"}

# after
{"color_correction_method": "lab"}

ALLOWED = {'lab', 'wavelet', 'adain', 'none'}
if color_correction_method not in ALLOWED:
    raise ValueError(f'invalid color_correction_method {color_correction_method!r}; use one of {sorted(ALLOWED)}')

def is_valid_color_method(v) -> bool:
    return isinstance(v, str) and v in {'lab', 'wavelet', 'adain', 'none'}

When it happens

Trigger: Supplying color_correction_method='LAB' (wrong case), 'none '/typo, or a new method name not in {lab, wavelet, adain, none} to SeedVR2PostProcessing, e.g. via a serialized workflow JSON or an API call that bypasses the combo widget.

Common situations: Hand-edited workflow JSON with a stale or misspelled enum; a frontend/custom node passing its own method names; version skew where a method was renamed or removed between ComfyUI versions.

Related errors

• SeedVR2TemporalChunk: chunking_mode must be 'auto' or 'manua
• Unknown context_schedule '{context_schedule}'.
• Unknown fuse_method '{fuse_method}'.
• {cls.__name__} does not have a NONE member to map None to
• Invalid {cls.__name__} string: '{value}'. Valid values are:

AI-assisted analysis of Comfy-Org/ComfyUI@1c6d8d45b3 (2026-08-14). Data as JSON: /api/errors/6bbb831a612e7acd. Report an issue: GitHub.