Hi! Author here, there are a few ways to use it, including your suggestion (did you make your suggestion up or were you pulling from the docs?):

    # magical, designed only for single shell scripts
    from pbs import *
    ffmpeg()

    # less magical
    from pbs import ffmpeg
    ffmpeg()

    # or
    import pbs
    pbs.ffmpeg()

    # no magic
    import pbs
    ffmpeg = pbs.Command(pbs.which("ffmpeg")) # command takes full path
    ffmpeg()

I tried to cover the main use cases adequately. My goal was to ease a pain point myself and others have experienced, that other popular packages don't address well unfortunately.

If it's helped anyone like it's helped me, I'm happy and glad to share!