Huge PDFs

Huge PDFs

[Jan Heinen]

>  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 ?

Regards
Jannis

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Re: Huge PDFs

[Hans Hagen]

On 29-12-2011 19:44, Jan Heinen wrote:
> I found another way to compress PDFs: The ConText-command
>
> \pdfcompresslevel=9
>
> qpdf and ghostwriter also helped.

use \maximumpdfcompression instead if the low level \pdf* command


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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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                                              | www.pragma-pod.nl
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Re: Huge PDFs

[Jan Heinen]

I found another way to compress PDFs: The ConText-command

\pdfcompresslevel=9

qpdf and ghostwriter also helped.

Thanx
Jannis
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Re: Huge PDFs

[luigi scarso]

On Thu, Dec 29, 2011 at 5:34 PM, Jan Heinen <JaHeinen@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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Re: Huge PDFs

[Jan Heinen]

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>/   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.


Regards
Jannis



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Re: Huge PDFs

[luigi scarso]

On Thu, Dec 29, 2011 at 2:19 PM, Hans Hagen <pragma@wxs.nl> wrote:
> On 29-12-2011 13:45, luigi scarso wrote:
>>
>> On Thu, Dec 29, 2011 at 12:16 PM, Jan Heinen<JaHeinen@gmx.de>  wrote:
>>>
>>> Hello,
>>>
>>> lots of my images are huge 200x250mm. I reduce their size with:
>>> \externalfigure[cow][width=20mm, heigth=25mm]
>>>
>>> After generating the PDF, the pdf is very huge.
>>>
>>> 1. Can't Context put the reduced image into the PDF?
>>> 2. How can I generate one PDF version for printing (300dpi) and one for
>>> the
>>> screen (72dpi)?
>>>
>>> I am using Context mk-IV.
>>
>> no, you need something like ghostscript.
>> In this case (if you have not problems of space and time) it's better
>> to transform the pdf in ps with
>>  pdftops yourfile.pdf
>> and then apply ghostscript to the final ps (see the documentation
>> about ghostscript)
>
>
> ghostscript can do that directly with the pdf (no need to go through ps)
>
> (also see:
> http://article.gmane.org/gmane.comp.tex.context/71919/match=lowres)
yes, but latest ghostscript (ver. 9)  sometimes fail when used
directly with pdf.
pdf -> pdftops ->ps ->ghostscript ->pdf seems to be more robust and
gives better results
(although space and time consuming).



-- 
luigi
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Re: Huge PDFs

[Hans Hagen]

On 29-12-2011 13:45, luigi scarso wrote:
> On Thu, Dec 29, 2011 at 12:16 PM, Jan Heinen<JaHeinen@gmx.de>  wrote:
>> Hello,
>>
>> lots of my images are huge 200x250mm. I reduce their size with:
>> \externalfigure[cow][width=20mm, heigth=25mm]
>>
>> After generating the PDF, the pdf is very huge.
>>
>> 1. Can't Context put the reduced image into the PDF?
>> 2. How can I generate one PDF version for printing (300dpi) and one for the
>> screen (72dpi)?
>>
>> I am using Context mk-IV.
> no, you need something like ghostscript.
> In this case (if you have not problems of space and time) it's better
> to transform the pdf in ps with
>   pdftops yourfile.pdf
> and then apply ghostscript to the final ps (see the documentation
> about ghostscript)

ghostscript can do that directly with the pdf (no need to go through ps)

(also see: 
http://article.gmane.org/gmane.comp.tex.context/71919/match=lowres)


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: Huge PDFs

[luigi scarso]

On Thu, Dec 29, 2011 at 12:16 PM, Jan Heinen <JaHeinen@gmx.de> wrote:
> Hello,
>
> lots of my images are huge 200x250mm. I reduce their size with:
> \externalfigure[cow][width=20mm, heigth=25mm]
>
> After generating the PDF, the pdf is very huge.
>
> 1. Can't Context put the reduced image into the PDF?
> 2. How can I generate one PDF version for printing (300dpi) and one for the
> screen (72dpi)?
>
> I am using Context mk-IV.
no, you need something like ghostscript.
In this case (if you have not problems of space and time) it's better
to transform the pdf in ps with
 pdftops yourfile.pdf
and then apply ghostscript to the final ps (see the documentation
about ghostscript)


-- 
luigi
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___________________________________________________________________________________

Huge PDFs

[Jan Heinen]

Hello,

lots of my images are huge 200x250mm. I reduce their size with:
\externalfigure[cow][width=20mm, heigth=25mm]

After generating the PDF, the pdf is very huge.

1. Can't Context put the reduced image into the PDF?
2. How can I generate one PDF version for printing (300dpi) 
and one for the screen (72dpi)?

I am using Context mk-IV.

Regards
Jannis

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