Batch for recursiv resize but only if larger than value

[ivovon]

Hi, I have a large number of Folders including many Pictures.
i have to resize them to save space on the file server.
i have a batch file that resizes long side to a value like 1024 or 2048. That’s fine. BUT: if the picture has a smaller long side, it will get bigger. Pictures must stay where that are, I just change the size and rewrite.
is there a chance to check, if dpi has a specific value and only resize if value is higher?

thank you very much.
regards
Ivo

[Bhikkhu Pesala]

• Should I assume that all of these images are in JPG format?
• You should check the box to use estimated quality, then if some images are lower quality they won't be saved at a preset higher quality, which would increase the file size.
• If you do not need to preserve image data, that will save considerable on file size
• In the advanced batch dialog, set the longest side in pixels to suit your needs
• Do not enlarge smaller images

[ivovon]

Thank you, but can I set the "Don't enlarge" in a cmd? I have to use it recursive in a folder tree...

[Bhikkhu Pesala]

Use /advancedbatch

/advancedbatch - apply Advanced Batch Dialog options to image (from INI file)

[ivovon]

Thank you very much.
Here I got the same approach:

https://irfanview-forum.de/forum/program/command-line-and-scripts/working-scripts/10362-?p=94108#post94108

Looks like, what I was searching for.