ValueError: not enough values to unpack (expected 2, got 0)

[talhaanwarch]

Unable to classify audio files. Getting this error.
ValueError: not enough values to unpack (expected 2, got 0) This is the code

datamodule = AudioClassificationData.from_files(
    train_files=list(train_df.path),
     train_targets=list(train_df.label),
    sampling_rate=16000,
    transform_kwargs=dict(spectrogram_size=(64, 64)),
    batch_size=4,
)

Where as train_df.path is wav files such as

['/content/Recordings/train_001.wav',
 '/content/Recordings/train_002.wav',
 '/content/Recordings/train_003.wav',
 '/content/Recordings/train_004.wav',]

Complete Error

ValueError                                Traceback (most recent call last)
[<ipython-input-24-02e6f89f2bb9>](https://localhost:8080/#) in <module>()
      6     sampling_rate=16000,
      7     transform_kwargs=dict(spectrogram_size=(64, 64)),
----> 8     batch_size=4,
      9 )

4 frames
[/usr/local/lib/python3.7/dist-packages/flash/audio/classification/data.py](https://localhost:8080/#) in from_files(cls, train_files, train_targets, val_files, val_targets, test_files, test_targets, predict_files, train_transform, val_transform, test_transform, predict_transform, target_formatter, input_cls, transform_kwargs, **data_module_kwargs)
    152         )
    153 
--> 154         train_input = input_cls(RunningStage.TRAINING, train_files, train_targets, transform=train_transform, **ds_kw)
    155         ds_kw["target_formatter"] = getattr(train_input, "target_formatter", None)
    156 

[/usr/local/lib/python3.7/dist-packages/flash/core/data/io/input.py](https://localhost:8080/#) in wrapper(self, *args, **kwargs)
    132         @functools.wraps(fn)
    133         def wrapper(self, *args, **kwargs):
--> 134             fn(self, *args, **kwargs)
    135             _validate_input(self)
    136 

[/usr/local/lib/python3.7/dist-packages/flash/core/data/io/input.py](https://localhost:8080/#) in __init__(self, running_stage, transform, transform_kwargs, input_transforms_registry, *args, **kwargs)
    190         self.data = None
    191         if len(args) >= 1 and args[0] is not None:
--> 192             self.data = getattr(self, f"{_STAGES_PREFIX[running_stage]}_load_data")(*args, **kwargs)
    193 
    194     def _create_dataloader_collate_fn(self, callbacks: List[FlashCallback]) -> Optional[Callable]:

[/usr/local/lib/python3.7/dist-packages/flash/core/data/io/input.py](https://localhost:8080/#) in train_load_data(self, *args, **kwargs)
    229             **kwargs: Any additional keyword arguments that the input requires.
    230         """
--> 231         return self.load_data(*args, **kwargs)
    232 
    233     def val_load_data(self, *args: Any, **kwargs: Any) -> Union[Sequence, Iterable]:

[/usr/local/lib/python3.7/dist-packages/flash/audio/classification/input.py](https://localhost:8080/#) in load_data(self, files, targets, target_formatter)
     60             files = filter_valid_files(files, valid_extensions=IMG_EXTENSIONS + NP_EXTENSIONS)
     61             return to_samples(files)
---> 62         files, targets = filter_valid_files(files, targets, valid_extensions=IMG_EXTENSIONS + NP_EXTENSIONS)
     63         self.load_target_metadata(targets, target_formatter=target_formatter)
     64         return to_samples(files, targets)

ValueError: not enough values to unpack (expected 2, got 0)

[ethanwharris]

Hey @talhaanwarch Thanks for reporting this! This is a bad error message, but I think it happens because ".wav" support is not released yet. It should be working if you install Flash from Github with:

pip install 'git+https://github.com/PyTorchLightning/lightning-flash.git#egg=lightning-flash[audio,image]'

I'll open an issue to improve the error messaging there. Hope that helps! 😃

[talhaanwarch]

thanks, but it did not worked

…

On Thu, Jun 30, 2022 at 8:47 PM Ethan Harris ***@***.***> wrote: Hey @talhaanwarch <https://github.com/talhaanwarch> Thanks for reporting this! This is a bad error message, but I think it happens because ".wav" support is not released yet. It should be working if you install Flash from Github with: pip install 'git+https://github.com/PyTorchLightning/lightning-flash.git#egg=lightning-flash[audio,image]' I'll open an issue to improve the error messaging there. Hope that helps! 😃 — Reply to this email directly, view it on GitHub <#1373 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AI5FYO4IHO7DAMXTEFNCA2TVRW6SZANCNFSM52JZLDHQ> . You are receiving this because you were mentioned.Message ID: <Lightning-AI/lightning-flash/repo-discussions/1373/comments/3057619@ github.com>

[ethanwharris]

Hey @talhaanwarch Did it give a different error that time? Could you share it? The other possibility is that the paths are not pointing to existing files. The path '/content/Recordings/train_001.wav' points to a file under the drive root, is that correct? If it's meant to be a relative path you would need to remove the leading slash (e.g. 'content/Recordings/train_001.wav')

[talhaanwarch]

thanks a lot. its a error on my side

…

On Thu, Jun 30, 2022 at 9:19 PM Ethan Harris ***@***.***> wrote: Hey @talhaanwarch <https://github.com/talhaanwarch> Did it give a different error that time? Could you share it? The other possibility is that the paths are not pointing to existing files. The path '/content/Recordings/train_001.wav' points to a file under the drive root, is that correct? If it's meant to be a relative path you would need to remove the leading slash (e.g. 'content/Recordings/train_001.wav') — Reply to this email directly, view it on GitHub <#1373 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AI5FYO3EU3MTJDYOVW6LH2LVRXCHRANCNFSM52JZLDHQ> . You are receiving this because you were mentioned.Message ID: <Lightning-AI/lightning-flash/repo-discussions/1373/comments/3057849@ github.com>