在Python中更新/附加到.wav文件 [英] Updating/appending to a .wav file in Python
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问题描述
我在Python脚本中加入了PCM音频帧流,并且能够将这些帧的块保存为.wav文件,如下所示:
I have a stream of PCM audio frames coming into my Python script, and I am able to save blocks of these frames as .wav files as such:
def update_wav():
filename = "test.wav"
wav_file = wave.open(filename, "wb")
n_frames = len(audio)
wav_file.setparams((n_channels, sample_width, sample_rate, n_frames, comptype, compname))
for sample in audio:
wav_file.writeframes(struct.pack('h', int(sample * 32767.0)))
wav_file.close()
但是,我希望随着新框架的加入而不断更新.是否可以通过附加到现有.wav文件的方式来写入框架?现在,我只能完成覆盖.
However, I'd like this to continually update as new frames come in. Is there way to writeframe in a way that appends to an existing .wav file? Right now I am only able to accomplish an overwrite.
推荐答案
I found a way of doing this with SciPy, it actually seems to be the default functionality for their writing method.
import scipy.io.wavfile
def update_wav():
numpy_data = numpy.array(audio, dtype=float)
scipy.io.wavfile.write("test.wav", 8000, numpy_data)
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