Oh that's incredible, thank you!
Okay only issue is I can't seem to get the preset working from the command line. I can create a preset in the gui and export it somewhere, but whatever I try to point the arguments at the preset file, whether in the same directory or not, doesn't seem to get used. The defaults would be fine actually, if only they included transparency/copying the alpha channel. Is there something I'm missing or is this perhaps a bug with the command line usage?