Transcribe speech using the Google Speech Recognition API

transcribe.py

"""
Transcribe speech using the Google Speech Recognition API
"""

import math
import speech_recognition
import sys


if len(sys.argv) < 2:
    print("usage: python3 transcribe.py speech_file.wav output_file.txt")
    sys.exit(0)

filename = sys.argv[1]
chunk_size_s = 60

recognizer = speech_recognition.Recognizer()
audio_file = speech_recognition.AudioFile(filename)
text = []

with audio_file as source:
    for i in range(0, math.floor(source.DURATION), chunk_size_s):
        duration = chunk_size_s 
        
        if i + chunk_size_s > source.DURATION:
            duration = source.DURATION - i

        audio = recognizer.record(source, offset=i, duration=duration)

        try:
            text.append(recognizer.recognize_google(audio))
        except speech_recognition.UnknownValueError as e:
            print(e)

with open(sys.argv[2] if len(sys.argv) > 2 else "output.txt", "w") as f:
    f.write("".join(text))