Recording automatically ends the recording python

# - * - Coding: UTF-8 - * - 
Import pyaudio 
Import numpy AS NP 
from SciPy Import fftpack 
Import Wave 


# Record 
# portaudio recording module must be installed, otherwise it will error 
# http://portaudio.com/docs/v19-doxydocs /compile_linux.html 
DEF recording (filename, time = 0, threshold = 7000): 
    "" " 
    : param filename: file name 
    : param time: recording time, if the specified time, according to the recording time, the default is to automatically identify whether the end of the recording 
    : param threshold: determining a threshold recording is ended 
    : return: 
    "" " 
    the CHUNK block size = 1024 # 
    FORMAT = pyaudio.paInt16 # bits per acquisition 
    cHANNELS = 1 # number of channels 
    rATE = 16000 # sampling rate: second acquisition the number of data 
    RECORD_SECONDS = time # recording time 
    WAVE_OUTPUT_FILENAME = filename # file location
    p = pyaudio.PyAudio()
    stream = p.open(format=FORMAT, channels=CHANNELS, rate=RATE, input=True, frames_per_buffer=CHUNK)
    print("* 录音中...")
    frames = []
    if time > 0:
        for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
            data = stream.read(CHUNK)
            frames.append(data)
    else:
        stopflag = 0
        stopflag2 = 0
        while True:
            data = stream.read(CHUNK)
            rt_data = np.frombuffer(data, np.dtype('<i2'))
            # print(rt_data*10)
            # 傅里叶变换
            fft_temp_data = fftpack.fft(rt_data, rt_data.size, overwrite_x=True)
            = np.abs fft_data (fft_temp_data) [0: // fft_temp_data.size. 1 + 2] 

            # test threshold, the output value of the threshold value for judging 
            Print (SUM (fft_data) // len (fft_data)) 

            # determines whether or not the microphone is stopped, it is determined talk has ended, # microphone threshold, default 7000 
            iF SUM (fft_data) // len (fft_data)> threshold: 
                StopFlag + = 1 
            the else: 
                stopflag2 + = 1 
            oneSecond = int (the RATE / CHUNK) 
            iF stopflag2 + StopFlag> oneSecond: 
                iF stopflag2> // oneSecond. 3 * 2: 
                    BREAK 
                the else: 
                    stopflag2 = 0 
                    StopFlag = 0 
            frames.append (Data) 
    Print ( "recording end *")
    stream.stop_stream () 
    stream.close () 
    p.terminate () 
    with wave.open (WAVE_OUTPUT_FILENAME, 'WB') AS WF: 
        wf.setnchannels (the CHANNELS) 
        wf.setsampwidth (p.get_sample_size (the FORMAT)) 
        wf.setframerate ( the RATE) 
        wf.writeframes (B ''. the Join (Frames)) 


# recording ( 'ppp.mp3', = time. 5) # according to the recording time, recording five seconds 
recording ( 'ppp.mp3') # no sound is automatically stopped ,Automatic stop