Applying changes to lots of files

[rich2005]

At risk of repeating myself, you can not use Hue-Chroma. It is a GEGL operation. GEGL is not scriptable with Gimp.

However, Chroma -100 desaturates a RGB image and can be substituted by the desaturate (luminosity) function.

Color-Balance is better, it is scriptable so get that pencil sharpened and start writing your script. That of course is for one file only and needs to be wrapped up in a batchfile to cycle through the filenames.

Back to BIMP Almost exactly as shown in the video only using Color-balance for the second 'other-gimp-function'

Here is a hint.