Error

[GrunCrow]

Describe the bug
During training from the GUI it gives me an error, the log says folder of a class is empty, but I checked and it has audio segments.

To Reproduce
Steps to reproduce the behavior:
For the GUI:

1. Go to Train
2. Click on Select training data, select folder

• Classifier output: tflite
• Epochs, batch size and learning rate, default
• Upsampling mode: SMOTE
• Upsampling ratio: 0.25
• Use mixup
• Crop mde: segments
• Model save: replace

4. See error:
   `Log:
   [2025-01-29 14:13:34]
   Traceback (most recent call last):
   File "birdnet_analyzer\utils.py", line 411, in upsample_core
   File "numpy\random\mtrand.pyx", line 951, in numpy.random.mtrand.RandomState.choice
   ValueError: 'a' cannot be empty unless no samples are taken

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "birdnet_analyzer\train.py", line 393, in trainModel
File "birdnet_analyzer\model.py", line 244, in trainLinearClassifier
File "birdnet_analyzer\utils.py", line 504, in upsampling
File "birdnet_analyzer\utils.py", line 413, in upsample_core
birdnet_analyzer.utils.EmptyClassException: Class with label Lanius is empty. Please remove it from the training data.`

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots

Lanius Folder:

Desktop (please complete the following information):

• OS: Win11
• Version 1.5.1