optimize/compress screenshots for docbook handbook

[Yuri Chornoivan]

El dijous, 29 de maig del 2025, a les 22:59:55 (Hora d’estiu d’Europa 
central), Jack va escriure:
> (I recently asked this on IRC, but Konversation crashed before I saw
> any response, so apologies if this is actually a duplicate request.)
> 
> I'm currently capturing screenshots for the handbook for the new
> version of KMyMoney.  I recall the last time I did this (years ago)
> there was a tool (or more than one?) for optimizing/compressing the png
> files, but I can't currently find any mention of such beyond the simple
> basics of capturing screenshots.

optipng (i'm sure there's more, search in you favorite search engine for 
optinpng alternative for linux or something)

Cheers,
  Albert

> 
> Thanks for any pointers to any fine manual I seem to have missed
> reading.
> 
> Jack

Hi,

Personally, I use pngnq/advpng like this:

#!/bin/sh

for i in *.png
do
     pngnq -s 1 "$i" && advpng -z4 "${i%.*}-nq8.png" && mv -f "${i%.*}-
nq8.png" "$i"
done 

Hope this helps.

Best regards,
Yuri