Dear Sir/Madam,
I am a Python expert with experience of file management and working with imagery. I have looked into ffmpeg, and it appears what you require is possible, so I believe I can deliver a high quality script for you.
My academic education was in Ecology and Natural Resources management, up to masters level, during which I gained skills in quantitative data analysis, programming, and statistics. This lead me to take on roles in data management and analysis for environmental consultancies for over five years, and I have additional experience gained from volunteer work and my current work as a freelance data scientist and developer.
I will be looking forward to hearing back from you about this opportunity, I could likely complete the task within a week.
Kind regards,
Shaun