How to make ImageMagick take file order correctly?

Question

linux

Hello. There are .png files, you need to convert them to pdf with compression. I do it like this:

convert -quality 75 *.png result.jpg && convert *.jpg result.pdf && rm *.jpg

But here's the problem. PNG files are sorted by name (in alphabetical order). But the resulting JPGs are no longer complete , the
result-0, result-1 ... result-9, result-10>
problem is that IM has a primitive sorting mechanism by name - numbers are not converted into numbers, as a result result-10.jpg in pdf will go in second, not 11th, as it should . What to do (except for a crutch in the form of renaming by hands)?
PS Directly from .png the file is 2 times larger, so I do intermediate compression to .jpg. Maybe there are better ways?

Answer 1

wincmd.ru/multirename.php is speeding up the crutch
www.imagemagick.org/Usage/files and these are the rules:
use wildcard not "*", but ? - one character
i.e. first shove everything with one, then with two, etc.
but safer - rename

Answer 2

#!/bin/bash
mkdir converted

for file in *.png;
do
  convert -quality 70 $file 'converted/'result.jpg
  mv 'converted/'result.jpg 'converted/'$file'_result'.jpg
  echo "Converted..."
done

echo "Done"

Thanks to the unknown author for the answer. In theory, this should be processed by IM in the same order as the source files.

Answer 3

Oh. You read man there. What can be thrown out of PNG and in what "quality" to get the output.
But my answer to the question is simple: use xargs.
Well, or we do it corny, for example, ls *.png | convert ...
But there is nothing better than xargs in this case.

Answer 4

convert `ls *.jpg | sort -n` result.pdf

Answer 5

example input_0.png input_1.png input_2.png ...input_10.png
result result_0.png result_1.png result_2.png ...result_10.png
or if only selected files are needed
but better
then the result is result_ 00 .png result_ 01 .png result_ 02 .png ...result_10.png which is much more convenient when working with files