python - 谷歌语音到文本不适用于小音频

Question

我希望它能够识别说话者说话的字母（0.28 秒的音频），但它给出了未知值错误

import speech_recognition as sr
r=sr.Recognizer()

l1=sr.AudioFile("clips/a.wav")
l2=sr.AudioFile("clips/B.wav")
with l1 as source:
   a1=r.record(source,offset=.28,duration=.28)
with l2 as source:
   a2=r.record(source) 

 print(r.recognize_google(a1))

Speech_recognition.UnknownValueError

标签： pythongoogle-apispeech-recognitionspeech-to-text