> What I would love would be an interactive script that asked me what I was trying to do and constructed a command line for me while explaining what it would do and the meaning of each argument. And of course it should favour commands that do not re-encode where possible.

My ChatGPT history is full of conversations like this.

I have mixed feelings about using chatgpt to write code. But LLMs certainly make an excellent ffmpeg frontend. And you can even ask them to explain all the ffmpeg arguments they used and why they used them.