write_audiofile raises IndexError/IOError

[xjcl]

This happened while writing a large (159MB, almost 3 hours) audio file.

Related issues

See #246, #262 (?), #265

Temporary Fix

write_audiofile completed successfully after I replaced each call of the form AudioFileClip(s) in my script by AudioFileClip(s, buffersize=20000) (i.e. setting buffersize to 20k). At that time I mistakenly believed the default buffersize for AudioFileClips to be 10k, but it is in fact 200k, so lowering(!) buffersize is what made it work properly. The call to write_audiofile remained unmodified (mentioned because this function also takes a buffersize as argument).

I have no idea whether this fix works in general or just for my specific file.

Traceback

(Note that IOError is aliased to OSError in Python3)

[MoviePy] Writing audio in ops01to40.mp3
 96%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████▋           | 219372/228977 [03:17<00:07, 1323.03it/s]Traceback (most recent call last):
  File "/usr/lib/python3.5/site-packages/moviepy/audio/io/readers.py", line 187, in get_frame
    result[in_time] = self.buffer[indices]
IndexError: index 100001 is out of bounds for axis 0 with size 100001

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "conan2.py", line 54, in <module>
    res.write_audiofile('ops01to40.mp3')
  File "<decorator-gen-73>", line 2, in write_audiofile
  File "/usr/lib/python3.5/site-packages/moviepy/decorators.py", line 54, in requires_duration
    return f(clip, *a, **k)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 204, in write_audiofile
    verbose=verbose, ffmpeg_params=ffmpeg_params)
  File "<decorator-gen-70>", line 2, in ffmpeg_audiowrite
  File "/usr/lib/python3.5/site-packages/moviepy/decorators.py", line 54, in requires_duration
    return f(clip, *a, **k)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/io/ffmpeg_audiowriter.py", line 161, in ffmpeg_audiowrite
    nbytes= nbytes, fps=fps):
  File "/usr/lib/python3.5/site-packages/tqdm/_tqdm.py", line 459, in __iter__
    for obj in iterable:
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 81, in generator
    buffersize=chunksize)
  File "<decorator-gen-72>", line 2, in to_soundarray
  File "/usr/lib/python3.5/site-packages/moviepy/decorators.py", line 54, in requires_duration
    return f(clip, *a, **k)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 127, in to_soundarray
    snd_array = self.get_frame(tt)
  File "<decorator-gen-14>", line 2, in get_frame
  File "/usr/lib/python3.5/site-packages/moviepy/decorators.py", line 89, in wrapper
    return f(*new_a, **new_kw)
  File "/usr/lib/python3.5/site-packages/moviepy/Clip.py", line 95, in get_frame
    return self.make_frame(t)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 292, in make_frame
    for c,part in zip(self.clips, played_parts)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 293, in <listcomp>
    if (part is not False) ]
  File "<decorator-gen-14>", line 2, in get_frame
  File "/usr/lib/python3.5/site-packages/moviepy/decorators.py", line 89, in wrapper
    return f(*new_a, **new_kw)
  File "/usr/lib/python3.5/site-packages/moviepy/Clip.py", line 95, in get_frame
    return self.make_frame(t)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 292, in make_frame
    for c,part in zip(self.clips, played_parts)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 293, in <listcomp>
    if (part is not False) ]
  File "<decorator-gen-14>", line 2, in get_frame
  File "/usr/lib/python3.5/site-packages/moviepy/decorators.py", line 89, in wrapper
    return f(*new_a, **new_kw)
  File "/usr/lib/python3.5/site-packages/moviepy/Clip.py", line 95, in get_frame
    return self.make_frame(t)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 292, in make_frame
    for c,part in zip(self.clips, played_parts)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/AudioClip.py", line 293, in <listcomp>
    if (part is not False) ]
  File "<decorator-gen-14>", line 2, in get_frame
  File "/usr/lib/python3.5/site-packages/moviepy/decorators.py", line 89, in wrapper
    return f(*new_a, **new_kw)
  File "/usr/lib/python3.5/site-packages/moviepy/Clip.py", line 95, in get_frame
    return self.make_frame(t)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/io/AudioFileClip.py", line 71, in <lambda>
    self.make_frame =  lambda t: reader.get_frame(t)
  File "/usr/lib/python3.5/site-packages/moviepy/audio/io/readers.py", line 193, in get_frame
    "but len(buffer)=%d\n"%(len(self.buffer))+ str(error))
OSError: Error in file 38.mp3, At time t=224.51-224.55 seconds, indices wanted: 100000-100479, but len(buffer)=100001
index 100001 is out of bounds for axis 0 with size 100001

[somewacko]

Interestingly after reducing buffersize, moviepy looks for a range with a negative value in the front, like:

indices wanted: -49499-500, but len(buffer)=1000
index -49499 is out of bounds for axis 0 with size 1000

Perhaps this is just a simple indexing problem?

In the meantime, I have a more reliable (and less efficient) workaround to get the audio signal for anyone else experiencing this bug:

import numpy as np
audio = np.vstack(audio_clip.iter_frames())

[keikoro]

I see one (merged) PR linked from this issue, did it solve the problem? (I'm guessing #19 is related)

[keikoro]

Oh wait, the other issue is in another repo... nevermind.

[Shubham-Kumar-2000]

Hi I am still facing this issue How to resolve this issue?

Any workarounds is appreciated

[Ned-Comet]

audio.write_audiofile("xxxx.wav", fps=44100, codec='pcm_s16le') works for me.
I met the same issue when I set fps=30 the same as video fps

Hi I am still facing this issue How to resolve this issue?

Any workarounds is appreciated

[OsaAjani]

Thank you for your contributions and for reporting issues in this repository. With the release of v2, which introduces significant changes to the codebase and API, we’ve reviewed the backlog of open PRs and issues. Due to the length of the backlog and the likelihood that many of these are either fixed or no longer applicable, we’ve made the decision to close all previous PRs and issues.

If you believe that any of these are still relevant to the current version or if you'd like to reopen a related discussion, please feel free to create a new issue or pull request, referencing the old one.

Thank you for your understanding and continued support!