[aubio-user] Split audio clip using Aubio

[Paul Brossier]

Hi Malintha!

On 2/13/13 1:18 AM, Malintha Adikari wrote:
> Hi, I want to split my audio file in to 20 seconds segments. Can I
> employ aubio for that operation? Then how can I do it ?

I just pushed a little python example to do that. It's not perfect
though: to get the exact duration, only part of the samples should be
written when a boundary is found.

> * Are you going to apply GSOC 2013 for aubio project ?

Yeah, that would be great. Any specific project in mind? :-)

Cheers, Paul

Here is the content of 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])
     sink_base, sink_ext = os.path.splitext(os.path.basename(source_file))
     slice_n, total_frames, read = 1, 0, 256
     f = source(source_file, 0, 256)
     g = sink(sink_base + '-%02d' % slice_n + sink_ext, f.samplerate)
     while read:
         vec, read = f()
         g(vec, read)
         total_frames += read
         if total_frames / float(f.samplerate) >= duration * slice_n:
             slice_n += 1
             del g
             g = sink(sink_base + '-%02d' % slice_n + sink_ext, 
f.samplerate)
     total_duration = total_frames / float(f.samplerate)
     print 'created %(slice_n)d slices from %(source_file)s' % locals(),
     print ' (total duration %(total_duration).2fs)' % locals()
     del f, g
--

>
> Thanks, Malintha Adikari
>
>
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