Comment by skydhash

If you take the set of possible ffmpeg invocations, it's very huge. Yes, it's possible to create some kind of wrapper that serve some common cases. And there are many of such wrappers or alternative tools like Xld (macOS) or Handbrake. But when you do need to use ffmpeg, that means that such wrapper is unfit for some reason or another. And in that case, it's not that much of an effort to read the manual which is very comprehensive.

It's the same with video viewers or music players. Often the default app of the OS is enough and they are very intuitive. But sometimes you need a bit more control and that's when using something like vlc or mpv which their extensive filter capabilities (which requires to have the doc at hand) is mandatory.

ffmpeg interface is ok for what it does. Any of your suggestion would be complex to implement if it aims to support the whole feature set of ffmpeg.