On Thu, Dec 29, 2011 at 5:34 PM, Jan Heinen <jahei...@gmx.de> wrote:
>>  pdf ->  pdftops ->ps ->ghostscript ->pdf
>>  seems to be more robust and gives better results
>>  --
>>  luigi
>
> I will give it a try:
> Can you tell me the commands with all the parameters I need ?
>
>
> I have tried the following:
>
> #!/bin/sh
> suffix="_opt.pdf"
> pdftops -paper match -level3 $1.pdf tmp.ps
> gs -sDEVICE=pdfwrite -dPDFSETTINGS=/ebook
> -dColorConversionStrategy=/LeaveColorUnchanged -dBATCH -dNOPAUSE
> -sOutputFile=$1.pdf$suffix tmp.ps
> rm tmp.ps
>
>
> But in some cases the PDF-files got bigger instead of smaller.
Yes this also my experience.
I suppose that gs acts only on images, not streams compression
You can try qpdf
http://qpdf.sourceforge.net
see 3.4. Advanced Transformation Options
http://qpdf.sourceforge.net/files/qpdf-manual.html#ref.advanced-transformation

-- 
luigi
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