怎么把视频的声音转成文字免费软件

from google.cloud import speech_v1p1beta1 as speech

def transcribe_video(video_path):
    client = speech.SpeechClient()

    with open(video_path, 'rb') as video_file:
        content = video_file.read()

    audio = speech.RecognitionAudio(content=content)
    config = speech.RecognitionConfig(
        encoding=speech.RecognitionConfig.AudioEncoding.LINEAR16,
        sample_rate_hertz=16000,
        language_code='en-US'
    )

    response = client.recognize(config=config, audio=audio)

    for result in response.results:
        print('Transcript: {}'.format(result.alternatives[0].transcript))

video_path = 'path/to/your/video/file.mp4'
transcribe_video(video_path)