Update in 2023
You no longer need this repo. You can achieve much better results with a few lines of Python. Please see https://techtldr.com/transcribing-speech-to-text-with-python-and-openai-api-whisper/ for more info.
Origina Readme...
Please visit https://www.alexkras.com/transcribing-audio-file-to-text-with-google-cloud-speech-api-and-python/ for detailed walk-through.