言语文本代码卡在“说些什么”上：

Question

我通过导入speech_recognition运行语音到python 3上的文本代码，我的程序卡在“说些什么”并显示

sudo jack_control start //终端命令

--- start

sudo python speech.py​​ //终端命令

终端输出：

ALSA lib pcm_dsnoop.c:606:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
speak say anything

python3代码：

import speech_recognition as sr 
r = sr.Recognizer()
with sr.Microphone() as source:
    print('speak say anything')
    audio = r.listen(source)
    text = r.recognize_google(audio)
    print("you said:{}".format(text))

无论是插孔还是代码，我都无法找到问题。

Answer 1

根据official documentation，listen()方法等待直到音频能量超过一定水平（表明有人说话），并记录直到检测到静音。如果你的麦克风吸收过多的环境噪音，那么listen()永远不会回来，因为它一直在等待沉默。

要解决这个问题，你可以使用r.adjust_for_ambient_noise(source)：

with sr.Microphone() as source:
    r.adjust_for_ambient_noise(source)
    print('speak say anything')
    audio = r.listen(source) 
    print("done listening")

您还可以在timeout中指定phrase_time_limit和listen()参数，使其在一定秒数后停止并返回，即使未检测到语音或静音。

with sr.Microphone() as source:
    r.adjust_for_ambient_noise(source)
    print('speak say anything')
    try:
    # wait for speech for a maximum of 3 seconds
    # listen to speech for a maximum of 3 seconds
        audio = r.listen(source, timeout=3, phrase_time_limit=3)
    except Exception as e:
        # a timeouterror exception will be thrown if the timeout is reached
        print(e) 
    print("done listening")

在初始化中，检查工作麦克风并明确设置device_index也是一个好主意：

for device_index in Microphone.list_working_microphones():
    m = Microphone(device_index=device_index)
    break
else:
    print("No working microphones found!")