如何用Python将音频文件的双通道分离成两个独立声道？
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本文共计472个文字，预计阅读时间需要2分钟。
某些音频是双声道对话，可能需要将音频作适当的分离。 例如代码如下： pythonimport waveimport numpy as np
def split_stereo_to_mono(input_path, output_path): with wave.open(input_path, 'rb') as wav: n_channels=wav.getnchannels() if n_channels !=2: raise ValueError(Input audio must be stereo)
frames=wav.readframes(wav.getnframes()) audio_data=np.frombuffer(frames, dtype=np.int16)
# Split stereo audio into two mono channels left_channel=audio_data[0::2] right_channel=audio_data[1::2]
# Write left channel to output file with wave.open(output_path + '_left.wav', 'wb') as left_wav: left_wav.setnchannels(1) left_wav.setsampwidth(wav.getsampwidth()) left_wav.setframerate(wav.getframerate()) left_wav.writeframes(left_channel.tobytes())
# Write right channel to output file with wave.open(output_path + '_right.wav', 'wb') as right_wav: right_wav.setnchannels(1) right_wav.setsampwidth(wav.getsampwidth()) right_wav.setframerate(wav.getframerate()) right_wav.writeframes(right_channel.tobytes())
Example usagesplit_stereo_to_mono('input.wav', 'output')
某些音频是双方对话，有可能需要对音频作通道的分离。
示例代码如下：
#!/usr/bin/env python # -*- coding: utf-8 -*- """ 音频双通道分离 """ import sys import numpy as np from scipy.io import wavfile from converter import mp3_to_wav def split_channel(wav_path, left_wav_path, right_wav_path): """ 通道分离 :param wav_path: wav音频的路径 :param left_wav_path: 左声道的wav音频路径 :param right_wav_path: 右声道的wav音频路径 :return None: """ try: sample_rate, wav_data = wavfile.read(wav_path) left = [] right = [] for item in wav_data: left.append(item[0]) right.append(item[1]) wavfile.write(left_wav_path, sample_rate, np.array(left)) wavfile.write(right_wav_path, sample_rate, np.array(right)) except IOError as e: print('error is %s' % str(e)) except: print('other error', sys.exc_info()) if __name__ == '__main__': mp3_to_wav('input/test.mp3', 'tmp/tmp.wav') split_channel('tmp/tmp.wav', 'output/left.wav', 'output/right.wav')
其中调用了一个自定义的库，converter.py 加入了代码：
from pydub import AudioSegment def mp3_to_wav(source, destin): """ mp3 转 wav :param source: :param destin: :return None: """ data = AudioSegment.from_mp3(source) data.export(destin, format='wav')
本代码示例可以生成两个通道分离后的 wav 文件。
注意：如果源文件的格式是 wav 文件，可以省掉转换格式的过程。
以上就是使用Python实现音频双通道分离的详细内容，更多关于python 音频分离的资料请关注易盾网络其它相关文章！
本文共计472个文字，预计阅读时间需要2分钟。
某些音频是双声道对话，可能需要将音频作适当的分离。 例如代码如下： pythonimport waveimport numpy as np
def split_stereo_to_mono(input_path, output_path): with wave.open(input_path, 'rb') as wav: n_channels=wav.getnchannels() if n_channels !=2: raise ValueError(Input audio must be stereo)
frames=wav.readframes(wav.getnframes()) audio_data=np.frombuffer(frames, dtype=np.int16)
# Split stereo audio into two mono channels left_channel=audio_data[0::2] right_channel=audio_data[1::2]
# Write left channel to output file with wave.open(output_path + '_left.wav', 'wb') as left_wav: left_wav.setnchannels(1) left_wav.setsampwidth(wav.getsampwidth()) left_wav.setframerate(wav.getframerate()) left_wav.writeframes(left_channel.tobytes())
# Write right channel to output file with wave.open(output_path + '_right.wav', 'wb') as right_wav: right_wav.setnchannels(1) right_wav.setsampwidth(wav.getsampwidth()) right_wav.setframerate(wav.getframerate()) right_wav.writeframes(right_channel.tobytes())
Example usagesplit_stereo_to_mono('input.wav', 'output')
某些音频是双方对话，有可能需要对音频作通道的分离。
示例代码如下：
#!/usr/bin/env python # -*- coding: utf-8 -*- """ 音频双通道分离 """ import sys import numpy as np from scipy.io import wavfile from converter import mp3_to_wav def split_channel(wav_path, left_wav_path, right_wav_path): """ 通道分离 :param wav_path: wav音频的路径 :param left_wav_path: 左声道的wav音频路径 :param right_wav_path: 右声道的wav音频路径 :return None: """ try: sample_rate, wav_data = wavfile.read(wav_path) left = [] right = [] for item in wav_data: left.append(item[0]) right.append(item[1]) wavfile.write(left_wav_path, sample_rate, np.array(left)) wavfile.write(right_wav_path, sample_rate, np.array(right)) except IOError as e: print('error is %s' % str(e)) except: print('other error', sys.exc_info()) if __name__ == '__main__': mp3_to_wav('input/test.mp3', 'tmp/tmp.wav') split_channel('tmp/tmp.wav', 'output/left.wav', 'output/right.wav')
其中调用了一个自定义的库，converter.py 加入了代码：
from pydub import AudioSegment def mp3_to_wav(source, destin): """ mp3 转 wav :param source: :param destin: :return None: """ data = AudioSegment.from_mp3(source) data.export(destin, format='wav')
本代码示例可以生成两个通道分离后的 wav 文件。
注意：如果源文件的格式是 wav 文件，可以省掉转换格式的过程。
以上就是使用Python实现音频双通道分离的详细内容，更多关于python 音频分离的资料请关注易盾网络其它相关文章！