See my more generalized CLI helper which does exactly this:

https://github.com/dheera/scripts/blob/master/helpme

Example usage:

    helpme ffmpeg assemble all the .jpg files into an .mp4 timelapse video at 8fps
    helpme zip my-folder into my-zip.tar with compression level 9
    helpme git delete commit 1a4db4c
    ...

This originated from an ffmpeg wrapper I wrote but then realized it could be used for all commands:

https://news.ycombinator.com/item?id=40410637