Using dual-channel separation audio Python

Some audio is dialogue between the parties, it may be necessary to make separate audio channels.

Sample code is as follows:

. 1  # ! / Usr / bin / Python the env 
2  # - * - Coding: UTF-. 8 - * - 
. 3  "" " 
. 4  audio dual channel separation
 . 5  " "" 
. 6  Import SYS
 . 7  Import numpy AS NP
 . 8  from scipy.io Import wavfile
 . 9  from Converter Import mp3_to_wav
 10  
. 11  
12 is  DEF split_channel (wav_path, left_wav_path, right_wav_path):
 13 is      "" " 
14      channel separator
 15      : param wav_path: wav audio path
 16      : param left_wav_path: left channel audio path wav
17     :param right_wav_path: 右声道的wav音频路径
18     :return None:
19     """
20     try:
21         sample_rate, wav_data = wavfile.read(wav_path)
22         left = []
23         right = []
24         for item in wav_data:
25             left.append(item[0])
26             right.append(item[1])
27         wavfile.write(left_wav_path, sample_rate, np.array(left))
28         wavfile.write(right_wav_path, sample_rate, np.array(right))
29     except IOError as e:
30         print('error is %s' % str(e))
31     except:
32         print('other error', sys.exc_info())
33 
34 
35 if __name__ == '__main__':
36     mp3_to_wav('input/test.mp3', 'tmp/tmp.wav')
37     split_channel('tmp/tmp.wav', 'output/left.wav', 'output/right.wav')

Which calls a custom library, converter.py joined the Code:

 1 from pydub import AudioSegment
 2 
 3 
 4 def mp3_to_wav(source, destin):
 5     """
 6     mp3 转 wav
 7     :param source:
 8     :param destin:
 9     :return None:
10     """
11     data = AudioSegment.from_mp3(source)
12     data.export(destin, format='wav')

This code can be generated wav files exemplary two separate channels.

Note: If the source file format is wav file format conversion process can be omitted.