In [2]:
import matplotlib.pyplot as plt
from scipy.io import wavfile as wav
import numpy as np
import IPython
%matplotlib inline
In [18]:
DIR = 'data/'
FILENAME = 'Intro'
EXT = '.mp3'
In [5]:
# This file is part of audioread.
# Copyright 2011, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Command-line tool to decode audio files to WAV files."""
from __future__ import print_function
import audioread
import sys
import os
import wave
import contextlib
def decode(filename):
filename = os.path.abspath(os.path.expanduser(filename))
if not os.path.exists(filename):
print("File not found.", file=sys.stderr)
sys.exit(1)
try:
with audioread.audio_open(filename) as f:
print('Input file: %i channels at %i Hz; %.1f seconds.' % \
(f.channels, f.samplerate, f.duration),
file=sys.stderr)
print('Backend:', str(type(f).__module__).split('.')[1],
file=sys.stderr)
with contextlib.closing(wave.open(filename + '.wav', 'w')) as of:
of.setnchannels(f.channels)
of.setframerate(f.samplerate)
of.setsampwidth(2)
for buf in f:
of.writeframes(buf)
except audioread.DecodeError:
print("File could not be decoded.", file=sys.stderr)
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decode(DIR + FILENAME + EXT)
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WAV_FILE = DIR + FILENAME + '.wav'
In [8]:
rate, data = wav.read(WAV_FILE)
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plt.plot(data)
plt.show()
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print('audio clip is %f seconds' % (data.shape[0] // rate))
In [12]:
IPython.display.Audio(WAV_FILE)
Out[12]: