我正在使用 pyaudio 使用此功能从两声道声卡记录数据
def record(self):
'''
Record Function reads from stream with configured soundcard and stores items in an array
uses callback function as can be told to stop recording during stream. After ending writes contents
to wav file
'''
wf = wave.open('audiooutput.wav', 'wb')
wf.setnchannels(2)
wf.setsampwidth(pyaudio.get_sample_size(pyaudio.paInt16))
wf.setframerate(44100)
p = pyaudio.PyAudio()
frames = []
# sub function checks the queue for a message to stop recording
def check_for_recordstop():
try:
message = self.my_queue.get(timeout = 0.1)
except:
return
if message == None:
pass
elif message.payload == "Stop":
self.confirm_message_recieved(message)
stream.stop_stream()
#subfunction callback
def callback(in_data, frame_count, time_info, status):
if stream.is_active():
frames.append(in_data)
return (in_data, pyaudio.paContinue)
else:
frames.append(in_data)
return (in_data, pyaudio.paComplete)
stream = p.open(format=pyaudio.get_sample_size(pyaudio.paInt16),
channels= 2,
rate=44100,
input=True,
frames_per_buffer=1024,
input_device_index=1,
stream_callback = callback)
self.logger.info("Recording")
stream.start_stream() # callback is run on a new thread when start_stream() is triggered
while stream.is_active(): #Loop to keep thread alive while callback is running
time.sleep(0.1)
check_for_recordstop()
print("done")
stream.close()
wf.writeframes(b''.join(frames))
wf.close()
p.terminate()
但是，当我大胆地查看这些数据时，我最终不会得到 2 通道流，它看起来像这样
但是当使用这样的函数时
CHUNK = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 44100
RECORD_SECONDS = 5
p = pyaudio.PyAudio()
stream = p.open(format=FORMAT,
channels=CHANNELS,
rate=RATE,
input=True,
input_device_index=1,
frames_per_buffer=CHUNK)
print("* recording")
frames = []
for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
data = stream.read(CHUNK)
frames.append(data)
print("* done recording")
stream.stop_stream()
stream.close()
p.terminate()
wf = wave.open("pyaudoutput.wav", 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(b''.join(frames))
wf.close()
音频数据按预期输出，请参见此处
我似乎无法从第二个函数中获得第一个函数来产生所需的结果！我需要为我的用例使用 pyaudio 的回调功能，但无法将两个通道分开。任何建议都会很棒！