Cygwin: convert: unrecognized option `-d'

Question

I use cygwin to convert a pdf file to png. It seems some installation package is missing or there is a problem somewhere

D:\>convert -d 300 foo.pdf bar.png

convert: unrecognized option `-d' @ error/convert.c/ConvertImageCommand/1382.

Answer 1

I went digging around, and I discovered this Stack Overflow post, which was a bit similar to yours. It, in turn, linked to this blog post, which describes using convert on the command line as this:

convert -density 300 -depth 4 lang.font-name.exp0.pdf lang.font-name.exp0.tif

In other words, -d may not be a valid option, partly because there are multiple options which begin with the letter d. Try using the following:

convert -density 300 foo.pdf bar.png

You may have to also specify a depth parameter.