tensorflow/models · error · ValueError

Unknown decoder type: {}!

Error message

Unknown decoder type: {}!

What it means

Error "Unknown decoder type: {}!" thrown in tensorflow/models.

Source

Thrown at official/projects/pix2seq/tasks/pix2seq_task.py:175

      self, params, input_context: Optional[tf.distribute.InputContext] = None
  ):
    """Build input dataset."""

    if params.tfds_name:
      decoder = tfds_factory.get_detection_decoder(params.tfds_name)
    else:
      decoder_cfg = params.decoder.get()
      if params.decoder.type == 'simple_decoder':
        decoder = tf_example_decoder.TfExampleDecoder(
            regenerate_source_id=decoder_cfg.regenerate_source_id
        )
      elif params.decoder.type == 'label_map_decoder':
        decoder = tf_example_label_map_decoder.TfExampleDecoderLabelMap(
            label_map=decoder_cfg.label_map,
            regenerate_source_id=decoder_cfg.regenerate_source_id,
        )
      else:
        raise ValueError(
            'Unknown decoder type: {}!'.format(params.decoder.type)
        )

    parser = pix2seq_input.Parser(
        eos_token_weight=self._task_config.losses.eos_token_weight,
        output_size=self._task_config.model.input_size[:2],
        max_num_boxes=self._task_config.model.max_num_instances,
        coord_vocab_shift=self._task_config.coord_vocab_shift,
        quantization_bins=self._task_config.quantization_bins,
        aug_scale_min=params.aug_scale_min,
        aug_scale_max=params.aug_scale_max,
        aug_color_jitter_strength=params.aug_color_jitter_strength,
        label_shift=params.label_shift,
    )

    reader = input_reader_factory.input_reader_generator(
        params,
        dataset_fn=dataset_fn.pick_dataset_fn(params.file_type),

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/projects/pix2seq/tasks/pix2seq_task.py:175 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of tensorflow/models@e006f5f0d5 (2026-08-24). Data as JSON: /api/errors/9518d063d09958c8. Report an issue: GitHub.