Image OCR using google docs, output to srt file

refactor the code more properly

How to use

Create new google cloud project and download credentials.json file: see https://developers.google.com/drive/api/quickstart/python

put credentials.json file beside main.py

Install the Google Client Library: pip install -r requirements.txt

Export images fro hard-subbed video: https://sourceforge.net/projects/videosubfinder/

Run python main.py and login with google account (only for first time), it creates a new file token.json

Wait until it complete processing evey image.

Code is based on https://tanaikech.github.io/2017/05/02/ocr-using-google-drive-api/