I am also interested in any experiences, especially regarding the computers you can attach to these small displays. I often see RPi as an option, but I heared about RocketChip, too. What are the best platforms to drive these displays?
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Finally I found the time to write down, how I use Ghostscript:
gs \ -sDEVICE=pdfwrite \ -o /output/gs_file.pdf \ -dPDFSETTINGS=/prepress \ -sProcessColorModel=DeviceCMYK \ -sDefaultCMYKProfile=/path/to/ISOcoated_v2_eci.icc \ -sColorConversionStrategy=CMYK \ source/file.pdf \ -fI don't now which of
ProcessColorModelorColorConversionStrategyis the important one. I kept both and did not bother to try to omit one of them.-dPDFSETTINGS=/prepressmakes sure that embedded bitmaps are in 300dpi and I think-fprevents Ghostscript staying in interactive mode after all pages have been finished.