ref: 341585b82fc14f64290032e8213639861dff7f8a
dir: /python/lib/aubio/cut.py/
#! /usr/bin/env python
""" this file was written by Paul Brossier
it is released under the GNU/GPL license.
"""
import sys
import argparse
def parse_args():
usage = "usage: %s [options] -i soundfile" % sys.argv[0]
usage += "\n help: %s -h" % sys.argv[0]
parser = argparse.ArgumentParser()
parser.add_argument("source_file", default=None, nargs='?',
help="input sound file to analyse", metavar = "<source_file>")
parser.add_argument("-i", "--input", action = "store", dest = "source_file2",
help="input sound file to analyse", metavar = "<source_file>")
parser.add_argument("-O","--onset-method",
action="store", dest="onset_method", default='default',
metavar = "<onset_method>",
help="onset detection method [default=default] \
complexdomain|hfc|phase|specdiff|energy|kl|mkl")
# cutting methods
parser.add_argument("-b","--beat",
action="store_true", dest="beat", default=False,
help="use beat locations")
"""
parser.add_argument("-S","--silencecut",
action="store_true", dest="silencecut", default=False,
help="use silence locations")
parser.add_argument("-s","--silence",
metavar = "<value>",
action="store", dest="silence", default=-70,
help="silence threshold [default=-70]")
"""
# algorithm parameters
parser.add_argument("-r", "--samplerate",
metavar = "<freq>", type=int,
action="store", dest="samplerate", default=0,
help="samplerate at which the file should be represented")
parser.add_argument("-B","--bufsize",
action="store", dest="bufsize", default=512,
metavar = "<size>", type=int,
help="buffer size [default=512]")
parser.add_argument("-H","--hopsize",
metavar = "<size>", type=int,
action="store", dest="hopsize", default=256,
help="overlap size [default=256]")
parser.add_argument("-t","--onset-threshold",
metavar = "<value>", type=float,
action="store", dest="threshold", default=0.3,
help="onset peak picking threshold [default=0.3]")
parser.add_argument("-c","--cut",
action="store_true", dest="cut", default=False,
help="cut input sound file at detected labels \
best used with option -L")
# minioi
parser.add_argument("-M","--minioi",
metavar = "<value>", type=str,
action="store", dest="minioi", default="12ms",
help="minimum inter onset interval [default=12ms]")
"""
parser.add_argument("-D","--delay",
action = "store", dest = "delay", type = float,
metavar = "<seconds>", default=0,
help="number of seconds to take back [default=system]\
default system delay is 3*hopsize/samplerate")
parser.add_argument("-C","--dcthreshold",
metavar = "<value>",
action="store", dest="dcthreshold", default=1.,
help="onset peak picking DC component [default=1.]")
parser.add_argument("-L","--localmin",
action="store_true", dest="localmin", default=False,
help="use local minima after peak detection")
parser.add_argument("-d","--derivate",
action="store_true", dest="derivate", default=False,
help="derivate onset detection function")
parser.add_argument("-z","--zerocross",
metavar = "<value>",
action="store", dest="zerothres", default=0.008,
help="zero-crossing threshold for slicing [default=0.00008]")
"""
# plotting functions
"""
parser.add_argument("-p","--plot",
action="store_true", dest="plot", default=False,
help="draw plot")
parser.add_argument("-x","--xsize",
metavar = "<size>",
action="store", dest="xsize", default=1.,
type=float, help="define xsize for plot")
parser.add_argument("-y","--ysize",
metavar = "<size>",
action="store", dest="ysize", default=1.,
type=float, help="define ysize for plot")
parser.add_argument("-f","--function",
action="store_true", dest="func", default=False,
help="print detection function")
parser.add_argument("-n","--no-onsets",
action="store_true", dest="nplot", default=False,
help="do not plot detected onsets")
parser.add_argument("-O","--outplot",
metavar = "<output_image>",
action="store", dest="outplot", default=None,
help="save plot to output.{ps,png}")
parser.add_argument("-F","--spectrogram",
action="store_true", dest="spectro", default=False,
help="add spectrogram to the plot")
"""
parser.add_argument("-o","--output", type = str,
metavar = "<outputdir>",
action="store", dest="output_directory", default=None,
help="specify path where slices of the original file should be created")
parser.add_argument("--cut-until-nsamples", type = int,
metavar = "<samples>",
action = "store", dest = "cut_until_nsamples", default = None,
help="how many extra samples should be added at the end of each slice")
parser.add_argument("--cut-every-nslices", type = int,
metavar = "<samples>",
action = "store", dest = "cut_every_nslices", default = None,
help="how many slices should be groupped together at each cut")
parser.add_argument("--cut-until-nslices", type = int,
metavar = "<slices>",
action = "store", dest = "cut_until_nslices", default = None,
help="how many extra slices should be added at the end of each slice")
parser.add_argument("-v","--verbose",
action="store_true", dest="verbose", default=True,
help="make lots of noise [default]")
parser.add_argument("-q","--quiet",
action="store_false", dest="verbose", default=True,
help="be quiet")
args = parser.parse_args()
if not args.source_file and not args.source_file2:
sys.stderr.write("Error: no file name given\n")
parser.print_help()
sys.exit(1)
elif args.source_file2 is not None:
args.source_file = args.source_file2
return args
def main():
options = parse_args()
source_file = options.source_file
hopsize = options.hopsize
bufsize = options.bufsize
samplerate = options.samplerate
source_file = options.source_file
from aubio import onset, tempo, source
s = source(source_file, samplerate, hopsize)
if samplerate == 0: samplerate = s.get_samplerate()
if options.beat:
o = tempo(options.onset_method, bufsize, hopsize, samplerate=samplerate)
else:
o = onset(options.onset_method, bufsize, hopsize, samplerate=samplerate)
if options.minioi:
if options.minioi.endswith('ms'):
o.set_minioi_ms(int(options.minioi[:-2]))
elif options.minioi.endswith('s'):
o.set_minioi_s(int(options.minioi[:-1]))
else:
o.set_minioi(int(options.minioi))
o.set_threshold(options.threshold)
timestamps = []
total_frames = 0
# analyze pass
while True:
samples, read = s()
if o(samples):
timestamps.append (o.get_last())
if options.verbose: print ("%.4f" % o.get_last_s())
total_frames += read
if read < hopsize: break
del s
# print some info
nstamps = len(timestamps)
duration = float (total_frames) / float(samplerate)
info = 'found %(nstamps)d timestamps in %(source_file)s' % locals()
info += ' (total %(duration).2fs at %(samplerate)dHz)\n' % locals()
sys.stderr.write(info)
# cutting pass
if options.cut and nstamps > 0:
# generate output files
from aubio.slicing import slice_source_at_stamps
timestamps_end = None
if options.cut_every_nslices:
timestamps = timestamps[::options.cut_every_nslices]
nstamps = len(timestamps)
if options.cut_until_nslices and options.cut_until_nsamples:
print ("warning: using cut_until_nslices, but cut_until_nsamples is set")
if options.cut_until_nsamples:
timestamps_end = [t + options.cut_until_nsamples for t in timestamps[1:]]
timestamps_end += [ 1e120 ]
if options.cut_until_nslices:
timestamps_end = [t for t in timestamps[1 + options.cut_until_nslices:]]
timestamps_end += [ 1e120 ] * (options.cut_until_nslices + 1)
slice_source_at_stamps(source_file, timestamps, timestamps_end = timestamps_end,
output_dir = options.output_directory,
samplerate = samplerate)
# print some info
duration = float (total_frames) / float(samplerate)
info = 'created %(nstamps)d slices from %(source_file)s' % locals()
info += ' (total %(duration).2fs at %(samplerate)dHz)\n' % locals()
sys.stderr.write(info)