Question

我一直在尝试使用pyaudio录制音频，直到输入流中遇到静音。但运行时出现分段错误。我认为在我的树莓中安装pyaudio / portaudio有什么不对pi因为当我试图在pyaudio docs中运行示例时，pyaudio正常工作它没有任何问题。我试图用pdb调试它 gdb是结果：

    Recording: Setting up

    Thread 1 "python" received signal SIGSEGV, Segmentation fault.
    0x7652a298 in ?? ()
    from /usr/lib/python2.7/dist-packages/_portaudio.arm-linux-     gnueabihf.so
    (gdb) backtrace
    #0  0x7652a298 in ?? ()
     from /usr/lib/python2.7/dist-packages/_portaudio.arm-linux-  gnueabihf.so
     #1  0x764f47b0 in Pa_GetDeviceInfo ()
     from /usr/lib/arm-linux-gnueabihf/libportaudio.so.2
     #2  0x7effe2c4 in ?? ()
     Backtrace stopped: previous frame identical to this frame (corrupt   stack?)
     (gdb)

pyaudio回调函数

def _callback(self, in_data, frame_count, time_info, status):  # pylint: disable=unused-argument

    debug = logging.getLogger('alexapi').getEffectiveLevel() == logging.DEBUG

    if not in_data:
        self._queue.put(False)
        return None, pyaudio.paAbort

    do_VAD = True
    if self._callback_data['force_record'] and not self._callback_data['force_record'][1]:
        do_VAD = False

    # do not count first 10 frames when doing VAD
    if do_VAD and (self._callback_data['frames'] < self._callback_data['throwaway_frames']):
        self._callback_data['frames'] += 1

    # now do VAD
    elif (self._callback_data['force_record'] and self._callback_data['force_record'][0]()) \
            or (do_VAD and (self._callback_data['thresholdSilenceMet'] is False)
                and ((time.time() - self._callback_data['start']) < self.MAX_RECORDING_LENGTH)):

        if do_VAD:

            if int(len(in_data) / 2) == self.VAD_PERIOD:
                isSpeech = self._vad.is_speech(in_data, self.VAD_SAMPLERATE)

                if not isSpeech:
                    self._callback_data['silenceRun'] += 1
                else:
                    self._callback_data['silenceRun'] = 0
                    self._callback_data['numSilenceRuns'] += 1

            # only count silence runs after the first one
            # (allow user to speak for total of max recording length if they haven't said anything yet)
            if (self._callback_data['numSilenceRuns'] != 0) \
                    and ((self._callback_data['silenceRun'] * self.VAD_FRAME_MS) > self.VAD_SILENCE_TIMEOUT):
                self._callback_data['thresholdSilenceMet'] = True

    else:
        self._queue.put(False)
        return None, pyaudio.paComplete

    self._queue.put(in_data)
    if debug:
        self._callback_data['audio'] += in_data

    return None, pyaudio.paContinue

pyaudio

def _callback(self, in_data, frame_count, time_info, status):  # pylint: disable=unused-argument

    debug = logging.getLogger('alexapi').getEffectiveLevel() == logging.DEBUG

    if not in_data:
        self._queue.put(False)
        return None, pyaudio.paAbort

    do_VAD = True
    if self._callback_data['force_record'] and not self._callback_data['force_record'][1]:
        do_VAD = False

    # do not count first 10 frames when doing VAD
    if do_VAD and (self._callback_data['frames'] < self._callback_data['throwaway_frames']):
        self._callback_data['frames'] += 1

    # now do VAD
    elif (self._callback_data['force_record'] and self._callback_data['force_record'][0]()) \
            or (do_VAD and (self._callback_data['thresholdSilenceMet'] is False)
                and ((time.time() - self._callback_data['start']) < self.MAX_RECORDING_LENGTH)):

        if do_VAD:

            if int(len(in_data) / 2) == self.VAD_PERIOD:
                isSpeech = self._vad.is_speech(in_data, self.VAD_SAMPLERATE)

                if not isSpeech:
                    self._callback_data['silenceRun'] += 1
                else:
                    self._callback_data['silenceRun'] = 0
                    self._callback_data['numSilenceRuns'] += 1

            # only count silence runs after the first one
            # (allow user to speak for total of max recording length if they haven't said anything yet)
            if (self._callback_data['numSilenceRuns'] != 0) \
                    and ((self._callback_data['silenceRun'] * self.VAD_FRAME_MS) > self.VAD_SILENCE_TIMEOUT):
                self._callback_data['thresholdSilenceMet'] = True

    else:
        self._queue.put(False)
        return None, pyaudio.paComplete

    self._queue.put(in_data)
    if debug:
        self._callback_data['audio'] += in_data

    return None, pyaudio.paContinue

这些实际上是我在互联网上找到的代码的改编。我仔细检查了我的设备索引和采样率它们没有任何问题有人可以帮我解决一下吗？完整代码为here

pdb结果

    > /usr/lib/python2.7/dist-packages/pyaudio.py(438)__init__()
   -> arguments['stream_callback'] = stream_callback
   (Pdb) step
    > /usr/lib/python2.7/dist-packages/pyaudio.py(441)__init__()
    -> self._stream = pa.open(**arguments)
   (Pdb) step
   Segmentation fault
    root@raspberrypi:/home/pi/Desktop# python -m pdb rp3test.py

Answer 1

Idk可能只是pyaudio和everylibs中的一个错误，它使用了python声音设备等pyaudio。因为我用sounddevice库试了一下。最后使用了这段代码

def silence_listener(throwaway_frames,filename = "recording.wav"):
# Reenable reading microphone raw data
inp = alsaaudio.PCM(alsaaudio.PCM_CAPTURE, alsaaudio.PCM_NORMAL, alsa_card)
inp.setchannels(1)
inp.setrate(VAD_SAMPLERATE)
inp.setformat(alsaaudio.PCM_FORMAT_S16_LE)
inp.setperiodsize(VAD_PERIOD)
audio = ""


# Buffer as long as we haven't heard enough silence or the total size is within max size
thresholdSilenceMet = False
frames = 0
numSilenceRuns = 0
silenceRun = 0
start = time.time()

# do not count first 10 frames when doing VAD
while (frames < throwaway_frames): # VAD_THROWAWAY_FRAMES):
    l, data = inp.read()
    frames = frames + 1
    if l:
        audio += data
        isSpeech = vad.is_speech(data, VAD_SAMPLERATE)

# now do VAD
while (thresholdSilenceMet == False) and ((time.time() - start) < MAX_RECORDING_LENGTH):
    l, data = inp.read()
    if l:
        audio += data

        if (l == VAD_PERIOD):
            isSpeech = vad.is_speech(data, VAD_SAMPLERATE)

            if (isSpeech == False):
                silenceRun = silenceRun + 1
                #print "0"
            else:
                silenceRun = 0
                numSilenceRuns = numSilenceRuns + 1
                #print "1"

    # only count silence runs after the first one
    # (allow user to speak for total of max recording length if they haven't said anything yet)
    if (numSilenceRuns != 0) and ((silenceRun * VAD_FRAME_MS) > VAD_SILENCE_TIMEOUT):
        thresholdSilenceMet = True

if debug: print ("End recording")

rf = open(filename, 'w')
rf.write(audio)
rf.close()
inp.close()
return

分段故障：在无阻塞模式下进行pyaudio录制

1 个答案: