Pyaudio录音多个小时

Question

我正在尝试一次录制多个（〜12）小时的麦克风。尝试关闭流时出现结构错误，但仅在长时间记录后才会发生。

这是我的代码：

import pyaudio
import wave

import sys

import keyboard


if __name__ == '__main__':
    print('recording')

    CHUNK = 1024
    FORMAT = pyaudio.paInt16
    CHANNELS = 2
    RATE = 44100
    RECORD_SECONDS = 5
    WAVE_OUTPUT_FILENAME = "raw_radio.wav"

    p = pyaudio.PyAudio()

    stream = p.open(format=FORMAT,
                    channels=CHANNELS,
                    rate=RATE,
                    input=True,
                    frames_per_buffer=CHUNK)

    frames = []

    flag = False
    try:
        while(not flag and sys.getsizeof(frames) < sys.maxsize * .8):
            for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
                try:
                    data = stream.read(CHUNK)
                    frames.append(data)
                except Exception as e:
                    print(e)
                    flag=True
    except KeyboardInterrupt:
        print('ended recording, now saving')
        pass

    stream.stop_stream()
    stream.close()
    p.terminate()

    wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
    wf.setnchannels(CHANNELS)
    wf.setsampwidth(p.get_sample_size(FORMAT))
    wf.setframerate(RATE)
    wf.writeframes(b''.join(frames))
    wf.close()

这是标准输出：

recording
ended recording, now saving
Traceback (most recent call last):
  File ".\record_mic.py", line 54, in <module>
    wf.writeframes(b''.join(frames))
  File "C:\Users\Ben\AppData\Local\Programs\Python\Python36\lib\wave.py", line 427, in writeframes
    self.writeframesraw(data)
  File "C:\Users\Ben\AppData\Local\Programs\Python\Python36\lib\wave.py", line 416, in writeframesraw
    self._ensure_header_written(len(data))
  File "C:\Users\Ben\AppData\Local\Programs\Python\Python36\lib\wave.py", line 457, in _ensure_header_written
    self._write_header(datasize)
  File "C:\Users\Ben\AppData\Local\Programs\Python\Python36\lib\wave.py", line 474, in _write_header
    self._sampwidth * 8, b'data'))
struct.error: argument out of range
Exception ignored in: <bound method Wave_write.__del__ of <wave.Wave_write object at 0x000001CA028A5FD0>>
Traceback (most recent call last):
  File "C:\Users\Ben\AppData\Local\Programs\Python\Python36\lib\wave.py", line 316, in __del__
  File "C:\Users\Ben\AppData\Local\Programs\Python\Python36\lib\wave.py", line 434, in close
  File "C:\Users\Ben\AppData\Local\Programs\Python\Python36\lib\wave.py", line 457, in _ensure_header_written
  File "C:\Users\Ben\AppData\Local\Programs\Python\Python36\lib\wave.py", line 474, in _write_header
struct.error: argument out of range

我在想，因为我必须两次按Ctrl + C才能引发KeyboardInput错误，我正在做一些错误地编辑框架列表的事情。

Answer 1

您正在尝试编写比wave格式可以表示的波形文件长的波形文件。您正尝试一次写入2 * 44100 * 2 *（12 * 3600）或7.3GB。

失败的代码是

        self._file.write(struct.pack('<L4s4sLHHLLHH4s',
            36 + self._datalength, b'WAVE', b'fmt ', 16,
            WAVE_FORMAT_PCM, self._nchannels, self._framerate,
            self._nchannels * self._framerate * self._sampwidth,
            self._nchannels * self._sampwidth,
            self._sampwidth * 8, b'data'))

这将写入wave标头。第一个L是数据的长度加上标题，该标题将数据限制为4294967259字节。这是4GB-36个字节

将文件分块写入。