More of a suggestion for the GitHub rather than an issue

[senpaizuri3]

It would be a good idea to mention that, because this is command-based, you can make a paste script. For an example I have a txt file that extracts all pcm*.int files from Grisaia no Kajitsu separately and puts them in appropriate output folders. You can, of course, change the sources or destinations by editing the file. If the source was detected automatically, you can remove the contents of the line (but not the line itself).
All you have to do to execute the "paste script" (as I call it) is paste the contents of the text file in the application.

The only con to said "paste scripts" is that each task is done one after the other so it does not have a cumulative time (but that's a feature you added yourself for multiple extractions or extraction and conversion in a single attempt, so I guess it can be a nonissue).

Edit: I don't know what you mean by the enhancement tag, since what I mentioned can be done now with the current version. (I just wanted to make that clear even though I already said as much.)

Edit 2: I read the description of it and now understand.