> I am looking at converting a colored pdf to black and white using gs.  I
> have all the proper command to do the conversion however it look like when
> it I convert the ps file back to pdf, it doesn't like the landscape
> formating.

> Here's the set of commands I use

> Convert from colored pdf to bw
> gs -sDEVICE=psmono -dNOPAUSE -dBATCH -dSAFER -sOutputFile=my-bw.psmy-color.pdf

> To convert ps file back pdf I use something similar to this
> gs -dBATCH -dNOPAUSE -sOutputFile=my-bw.pdf -sDEVICE=pdfwrite
> -dAutoRotatePages=/None -c "<< /PageSize [792 612] /Orientation 3 >>
> setpagedevice" 90 rotate 0 -612 translate -f my-bw.ps

> The original colored pdf files could varie from 1 to 20 pages. All pages are
> in landscape format. When I open the ps file in gv all test and paper
> orientation look great.

So you're saying that the pdf2ps conversion works right, so you get a PS
that looks exactly like what you want except you want it in PDF?
I.e. the problem is that the ps2pdf conversion does something wrong?

If so, what does it do wrong, concretely?  Does ps2pdf introduce the
same problems or are these different?


        Stefan
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