Because FFmpeg is a swiss army knife with a million blades and I don't think any easy interface is really going to do the job well. It's a great LLM use case.
I know everybody uses a subscription for these things, but doesn't it at least feel expensive to use an LLM like this? Like turning on the oven to heat up a single slice of pizza.
But you only need to find the correct tool once and mark it in some way. Aka write a wrapper script, jot down some notes. You are acting like you’re forced to use the cli each time.