1. 从 二进制 pcm 文件中读取数据,并转化位想要的矩阵数组
with open(audioPath, 'rb') as f:
audioData = np.fromfile(f, dtype = np.uint16)
audioData.shape = -1, 8
转换的音频数据是 不确定行,8列数组。
2. 把矩阵转置,以单声道数据为行。
audioData = audioData.T
转换为 8行的二维数组,每一行就是一个声道的数据。
3. 抽取一个通道的数据。
ch1 = audioData[4]
4. 把这个通道的数据写入二进制文件
ch1.tofile("./audio/ch1.pcm")
参考: https://blog.51cto.com/feature09/2316652
https://blog.csdn.net/Tourior/article/details/110791039
https://blog.csdn.net/kebu12345678/article/details/54837245
https://numpy.org/doc/stable/reference/generated/numpy.fromfile.html#:~:text=numpy.fromfile. ¶. numpy.fromfile(file%2C dtype%3Dfloat%2C count%3D-1%2C sep%3D''%2C offset%3D0) ¶.,tofile method can be read using this function.
https://www.cnblogs.com/peixu/p/7991715.html
https://blog.csdn.net/botao_li/article/details/104378469
https://www.cnblogs.com/noluye/p/11224137.html