New answers tagged imagemagick
Print the PNG files to PDF. By default, the PDF pages will all be the same size but you can crop them down once it is created.
The problem arises, because ImageMagick cannot determine the resolution of the input PDF and hence is using the default resolution of 72x72dpi as shown in the convert -verbose 0038.pdf out.pdf output: [ghostscript library] -q -dQUIET (...) "-r72x72" (...) You applied the correct option -density 300, but as an output option, i.e. after the input file name. ...
I'm pretty sure ImageMagick won't work recursively like that by itself. You'll need to write a script/program around it to work through your directory structure and call it once per file you want to check.
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