If no output directory is given, the file is extracted to the file name minus the extension plus "`_extracted`" (
e.g. `xPackmanJr_0.105.star` -> `xPackmanJr_0.105_extracted`). Same goes for packing (it will append `_packed.star`).
**NOTE:** Packing is experimental since I have no way to test it and I'm not sure about the limitations of the system (e.g. filenames). I also don't know if the order of the files is relevant.