Python Subtitle Generation Script

I need a Python script that processes an input video with audio. The script should generate subtitles from the audio and then add them to the video.

Requirements:
- Generate subtitles from English audio
- Apply custom font and color as specified

Ideal Skills & Experience:
- Proficiency in Python
- Experience with video and audio processing
- Familiarity with subtitle generation tools and libraries
- Ability to implement custom styling for subtitles

Subtitles should be similar to below image or video.