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Unhelpful error message in recurrence_matrix [formerly: Load Small Duration Error]

See original GitHub issue

Description

I have a project that has to occasionally deal with very small audio file segments. These segments can be less than 2 seconds long. pydub handles small segments correctly, but librosa crashes.

Steps/Code to Reproduce

import librosa

librosa.load(file_path, sr=None, duration=1, offset=10)

Expected Results

I expected to be able to load the offset to duration length of the file

Actual Results

...
  File "/Users/patrick/anaconda3/lib/python3.6/site-packages/librosa/decompose.py", line 503, in nn_filter
    rec = segment.recurrence_matrix(S, axis=axis, **kwargs)
  File "/Users/patrick/anaconda3/lib/python3.6/site-packages/librosa/segment.py", line 216, in recurrence_matrix
    rec.setdiag(0, diag)
  File "/Users/patrick/anaconda3/lib/python3.6/site-packages/scipy/sparse/base.py", line 1143, in setdiag
    raise ValueError("k exceeds matrix dimensions")
ValueError: k exceeds matrix dimensions

Versions

Darwin-18.2.0-x86_64-i386-64bit
Python 3.6.5 |Anaconda, Inc.| (default, Apr 26 2018, 08:42:37)
[GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)]
NumPy 1.14.3
SciPy 1.1.0
librosa 0.6.2

Issue Analytics

State:
Created 5 years ago
Comments:7 (5 by maintainers)

Top GitHub Comments

1reaction

bmcfeecommented, Feb 16, 2019

Note: I’m re-opening this issue and flagging it for 0.7 so that we improve the documentation in the recurrence matrix function.

1reaction

bmcfeecommented, Feb 13, 2019

Great, thanks for checking back on it! I expect that the culprit here is the width parameter, which is passed through to recurrence_matrix and documented here: https://librosa.github.io/librosa/generated/librosa.segment.recurrence_matrix.html#librosa.segment.recurrence_matrix . I don’t know what you currently have it set to, but dropping it down to something smaller should resolve the problem.

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