ref: 2a14820a54dc6147abcd3c8eabd2eb0eaa5e9755
dir: /python/demos/demo_slicing.py/
#! /usr/bin/env python import sys import os.path from aubio import source, sink if __name__ == '__main__': if len(sys.argv) < 3: print 'usage: %s <inputfile> <duration>' % sys.argv[0] sys.exit(1) source_file = sys.argv[1] duration = float(sys.argv[2]) source_base_name, source_ext = os.path.splitext(os.path.basename(source_file)) hopsize = 256 slice_n, total_frames_written, read = 0, 0, hopsize def new_sink_name(source_base_name, slice_n, duration = duration): return source_base_name + '_%02.3f' % (slice_n*duration) + '.wav' f = source(source_file, 0, hopsize) samplerate = f.samplerate g = sink(new_sink_name(source_base_name, slice_n), samplerate) #print "new slice:", slice_n, 0, "+", 0, "=", 0 while read == hopsize: vec, read = f() start_of_next_region = int(duration * samplerate * (slice_n + 1)) remaining = start_of_next_region - total_frames_written # number of samples remaining is less than what we got if remaining <= read: # write remaining samples from current region g(vec[0:remaining], remaining) # close this file del g #print "new slice", slice_n, total_frames_written, "+", remaining, "=", start_of_next_region slice_n += 1 # create a new file for the new region g = sink(new_sink_name(source_base_name, slice_n), samplerate) # write the remaining samples in the new file g(vec[remaining:read], read - remaining) else: g(vec[0:read], read) total_frames_written += read total_duration = total_frames_written / float(samplerate) slice_n += 1 print 'created %(slice_n)s slices from %(source_base_name)s%(source_ext)s' % locals(), print ' (total duration %(total_duration).2fs)' % locals() # close source and sink files del f, g