snippets/old_snippets/imagemagik-png-to-jpg-white-bg.en.md

title	seo_description	date	draft	snippet_types
imagemagik .png to .jpg with white background	snippet explaining how to use imagemagik to covert images from .png .jpg and make the transparent parts white	2022-03-03T21:31:00+01:00	false	imagemagik

Working on some .png map files today. I needed to covert them to small .jpg's for uses in Oblastle. Problem being by default the transparent part fills into to black. Here is how to make it white:

$ ls
us-ak.png
us-al.png
us-ar.png
us-az.png
us-ca.png

$ for file in *.png ; do magick mogrify -format jpg -resize '500' -background white -flatten  $file; done

$ ls
us-ak.png
us-ak.jpg
us-al.png
us-al.jpg
us-ar.png
us-ar.jpg
us-az.png
us-az.jpg
us-ca.png

$ rm ./*.png

The important bit being -background white -flatten.

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