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Recursively loops through a directory (./audio) looking for audio and analyzes it with the EchoNest API.
#!/usr/bin/env python
#
# This is a small script which can be used to recursively loop through
# a directory and analyze every piece of audio in that directory using
# the impressive EchoNest API (http://the.echonest.com/).
#
# After completion, it will write a file in this script's directory
# which contains a mapping of every absolute file path analyzed and
# the related MD5 and title attributes of the resulting track. You
# can then use these MD5s in your own projects to reference the final
# analysis data over the EchoNest API.
#
# This also now stores some interesting information from the API
# into the JSON. This includes most of the analysis data (I figure
# that I probably missed something) as well as the bitrate, song title,
# artist, etc.
#
# This was created with the current development version of PyEchoNest.
#
#!/usr/bin/env python
from pyechonest import track, song
import os
import json
analysis_dir = os.path.abspath(os.path.dirname(__file__))
dir_segments = [
analysis_dir,
'audio',
]
allowed_file_extensions = ['.flac', '.mp3', '.ogg', '.wav']
audio_dir = os.sep.join(dir_segments)
if not os.path.exists(audio_dir):
raise ValueError('Directory does not exist: {0}'.format(audio_dir))
if not os.path.isdir(audio_dir):
raise ValueError('File must be a directory: {0}'.format(audio_dir))
meta_data = {}
def analyze_audio(dir_name):
for filename in os.listdir(dir_name):
absolute_path = os.sep.join([
dir_name,
filename
])
print('Creating track from: {0}'.format(absolute_path))
if os.path.isdir(absolute_path):
analyze_audio(absolute_path)
elif os.path.splitext(filename)[1] in allowed_file_extensions:
next_track = track.track_from_filename(absolute_path)
if next_track is not None:
meta_data[absolute_path] = {
'id': next_track.id,
'md5': next_track.md5,
'status': next_track.status,
'title': next_track.title,
'artist': next_track.artist,
'analysis': {
'status': next_track.status,
'tatums': next_track.tatums,
'segments': next_track.segments,
'sections': next_track.sections,
'beats': next_track.beats,
'bars': next_track.bars,
'danceability': next_track.danceability,
'bitrate': next_track.bitrate,
'url': next_track.analysis_url,
'channels': next_track.analysis_channels,
'loudness': next_track.loudness,
'energy': next_track.energy,
'time_signature': {
'estimate': next_track.time_signature,
'confidence': next_track.time_signature_confidence,
},
'tempo': {
'estimate': next_track.tempo,
'confidence': next_track.tempo_confidence
},
'key': {
'estimate': next_track.key,
'confidence': next_track.key_confidence,
},
'mode': {
'estimate': next_track.mode,
'confidence': next_track.mode_confidence,
},
'fading': {
'start': next_track.start_of_fade_out,
},
'samples': {
'rate': next_track.samplerate,
'analysis_rate': next_track.analysis_sample_rate,
'count': next_track.num_samples,
},
}
}
analyze_audio(audio_dir)
meta_file = open(os.sep.join([analysis_dir, 'metadata.json']), 'w')
meta_file.write(json.dumps(meta_data))
meta_file.close()
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