使用 Pydub 在Python中处理 wav 文件
音频文件是一种广泛的信息传输方式。那么让我们看看如何使用Python处理音频文件。 Python提供了一个名为pydub的模块来处理音频文件。 pydub是一个Python库,只能处理 .wav文件。通过使用这个库,我们可以播放、拆分、合并、编辑我们的. wav 音频文件。
安装
这个模块没有内置在Python中。要安装它,请在终端中键入以下命令。
pip install pydub
以下是 pydub 可以执行的一些功能:
- 播放音频文件。
- 我们可以得到文件的某些信息,比如长度通道。
- 增加/减少给定 .wav 文件的音量。
- 合并两个或多个音频文件。
- 导出音频文件。
- 分割音频文件。
要访问输入声音文件,请单击 这里。让我们看看 pydub 库的一些功能的代码:
1)播放音频文件:这是使用play()方法完成的。
Python3
# import required libraries
from pydub import AudioSegment
from pydub.playback import play
# Import an audio file
# Format parameter only
# for readability
wav_file = AudioSegment.from_file(file = "Sample.wav",
format = "wav")
# Play the audio file
play(wav_file)
Python3
# import required library
from pydub import AudioSegment
# import the audio file
wav_file = AudioSegment.from_file(file="Sample.wav", format="wav")
# data type fo the file
print(type(wav_file))
# OUTPUT:
# To find frame rate of song/file
print(wav_file.frame_rate)
# OUTPUT: 22050
# To know about channels of file
print(wav_file.channels)
# OUTPUT: 1
# Find the number of bytes per sample
print(wav_file.sample_width )
# OUTPUT : 2
# Find Maximum amplitude
print(wav_file.max)
# OUTPUT 17106
# To know length of audio file
print(len(wav_file))
# OUTPUT 60000
'''
We can change the attrinbutes of file by
changeed_audio_segment = audio_segment.set_ATTRIBUTENAME(x)
'''
wav_file_new = wav_file.set_frame_rate(50)
print(wav_file_new.frame_rate)
Python3
# import required library
import pydub
from pydub.playback import play
wav_file = pydub.AudioSegment.from_file(file = "Sample.wav",
format = "wav")
# Increase the volume by 10 dB
new_wav_file = wav_file + 10
# Reducing volume by 5
silent_wav_file = wav_file - 5
# Playing silent file
play(silent_wav_file)
# Playing original file
play(wav_file)
# Playing louder file
play(new_wav_file)
# Feel the difference!
Python3
# import required libraries
from pydub import AudioSegment
from pydub.playback import play
wav_file_1 = AudioSegment.from_file("noice.wav")
wav_file_2 = AudioSegment.from_file("Sample.wav")
# Combine the two audio files
wav_file_3 = wav_file_1 + wav_file_2
# play the sound
play(wav_file_3)
Python3
# import library
from pydub import AudioSegment
# Import audio file
wav_file = AudioSegment.from_file("Sample.wav")
'''
You can do anything like remixing and export
I'm increasing volume just for sake of my simplicity
Increase by 10 decibels
'''
louder_wav_file = wav_file + 10
# Export louder audio file
louder_wav_file.export(out_f = "louder_wav_file.wav",
format = "wav")
Python3
# import required libraries
from pydub import AudioSegment
from pydub.playback import play
# importing audio file
a = AudioSegment.from_file("pzm12.wav")
# Split stereo to mono
b = a.split_to_mono()
print(b)
print(b[0].channels )
b[0].export(out_f="outNow.wav",format="wav")
输出:
2)了解 .wav 文件:为此,我们将使用音频文件对象的属性。
Python3
# import required library
from pydub import AudioSegment
# import the audio file
wav_file = AudioSegment.from_file(file="Sample.wav", format="wav")
# data type fo the file
print(type(wav_file))
# OUTPUT:
# To find frame rate of song/file
print(wav_file.frame_rate)
# OUTPUT: 22050
# To know about channels of file
print(wav_file.channels)
# OUTPUT: 1
# Find the number of bytes per sample
print(wav_file.sample_width )
# OUTPUT : 2
# Find Maximum amplitude
print(wav_file.max)
# OUTPUT 17106
# To know length of audio file
print(len(wav_file))
# OUTPUT 60000
'''
We can change the attrinbutes of file by
changeed_audio_segment = audio_segment.set_ATTRIBUTENAME(x)
'''
wav_file_new = wav_file.set_frame_rate(50)
print(wav_file_new.frame_rate)
输出:
22050
1
2
17106
60000
50
3)增加/减少文件的体积:通过使用' +'和' -'运算符。
Python3
# import required library
import pydub
from pydub.playback import play
wav_file = pydub.AudioSegment.from_file(file = "Sample.wav",
format = "wav")
# Increase the volume by 10 dB
new_wav_file = wav_file + 10
# Reducing volume by 5
silent_wav_file = wav_file - 5
# Playing silent file
play(silent_wav_file)
# Playing original file
play(wav_file)
# Playing louder file
play(new_wav_file)
# Feel the difference!
输出:
4)合并文件:这是使用'+' 运算符完成的。
Python3
# import required libraries
from pydub import AudioSegment
from pydub.playback import play
wav_file_1 = AudioSegment.from_file("noice.wav")
wav_file_2 = AudioSegment.from_file("Sample.wav")
# Combine the two audio files
wav_file_3 = wav_file_1 + wav_file_2
# play the sound
play(wav_file_3)
输出:
5) 导出文件:这是使用export()方法完成的。
Python3
# import library
from pydub import AudioSegment
# Import audio file
wav_file = AudioSegment.from_file("Sample.wav")
'''
You can do anything like remixing and export
I'm increasing volume just for sake of my simplicity
Increase by 10 decibels
'''
louder_wav_file = wav_file + 10
# Export louder audio file
louder_wav_file.export(out_f = "louder_wav_file.wav",
format = "wav")
输出:
6)分割音频:使用split_to_mono()方法分割音频。
Python3
# import required libraries
from pydub import AudioSegment
from pydub.playback import play
# importing audio file
a = AudioSegment.from_file("pzm12.wav")
# Split stereo to mono
b = a.split_to_mono()
print(b)
print(b[0].channels )
b[0].export(out_f="outNow.wav",format="wav")
输出:
[, ]
1