Skipping half images from a thread.

[junomarian]

Is it possible to download only half/alternative images from a forum thread?
Site Vipergirls Page have 200 pics . I just want to download half of them 1,3,5 or 2,4,6 odd or even
doesnt matter. Is it possible with gallery-dl r:

[mikf]

Not exactly, but you can make it somewhat work.

Either you write all potential URLs from a thread to file, filter them somehow, and then use said file as input for gallery-dl

$ gallery-dl -g r:https://vipergirls.to/threads/... > urls.txt
# remove unwanted URLs from 'urls.txt'
$ gallery-dl -i urls.txt

or you use --chapter-range with a long list of indices:

$ gallery-dl --range 1,3,5,7,9,11,13,...,201,203,205 r:https://vipergirls.to/threads/...

[mikf]

Downloading only every 2nd or 3rd file is now possible with the changes from d651d45:
--range 1::2, --range 2::3, etc.