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Convert the colorspace of a PDF from RGB to CMYK under Ubuntu Linux

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Henning Koch
August 24, 2011Software engineer at makandra GmbH

Note that converting from RGB to CMYK will usually degrade your colors because no exact mapping is possible. Anyway, this Stackoverflow post Archive worked for me:

gs -dSAFER -dBATCH -dNOPAUSE -dNOCACHE -sDEVICE=pdfwrite \
-sColorConversionStrategy=CMYK -dProcessColorModel=/DeviceCMYK \
-sOutputFile=output.pdf input.pdf
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Posted by Henning Koch to makandra dev (2011-08-24 13:52)