stripping the DPI from many png images at once

[aimeeandbeatles]

I usually do this manually within IrfanView by going to Info, removing the DPI number, and then saving again. But this gets annoying on multiple images. I was trying to google how to do this. Firstly I searched for that but I stupidly forgot to turn on safesearch. Oops. So I tried again this time with the proper settings. I found a program to set the DPI for a bunch of files:
http://blog.quppa.net/2011/03/10/setdpi-utility/

Which is not what I want. Also it mentions PNGOUT strips the info but I'd rather not use that (I use it for my web-quality images and not the archival version, as on occasion it'll drop the color depth of the archival versions).

Does anyone have any suggestions?

 

[Till]

Have you tried Irfanview's batch processing? Failing that, you could write a scheme script for GIMP.

 

[aimeeandbeatles]

well I was looking at the batch processing and I could not find an option for that but I will look again.

EDIT: I see in the advanced options "Set new DPI value." Thanks!