Re: [hylafax-users] Resize pdf to document size

[Konrad Baechler <konrad@xxxxxxxxx>]

Hi Alex

Maybe the following extracts from one of our script helps you. It is 
processing heterogeneous pdf input (like too big, too small, landscape 
and portrait mixed in one pdf etc.) and standardizes the output to A4. 
It needs a few tools: pdftk, gs, convert and tiffcp. The CPU load might 
be high during conversion - and conversion might take time for large 
documents.

The two methods, PDF->TIFF or PDF->PDF, are independent.

$FN contains the input file (pdf). Output is either $FN\.out.tif or 
$FN\.out.pdf .


Method 1, PDF -> TIFF:

[...]
    echo `date +%T.%N` Method CONVERTTIFF
    echo `date +%T.%N` Splitting PDF...

    pdftk $FN burst output $FN\_singlepage_%03d.pdf
    convert +dither -density 204x196 $FN\_singlepage_*.pdf -colorspace 
GRAY -rotate "-90>" -quality 100 $FN\_%03d.png
    rm $FN\_singlepage_*.pdf

    convert +antialias +dither $FN\_*.png -adjoin -modulate 80 -level 
30% -white-threshold 85% -black-threshold 20% -dither -monochrome -page 
 A4+0-35 $FN\.out_temp.pdf

    rm $FN\_*.png

    gs -sDEVICE=tiffg3 -dNOPAUSE -dSAFER -dBATCH -sPAPERSIZE=A4 
-dFIXEDMEDIA -r204x196 -sOutputFile=$FN\.out_temp.tif $FN\.out_temp.pdf
    tiffcp -c g3 -r -1 -f lsb2msb $FN\.out_temp.tif $FN\.out.tif
    rm $FN\.out_temp.*

    echo `date +%T.%N` I am done.
[...]

OR, Method 2, PDF -> PDF

[...]

    echo `date +%T.%N` Method CONVERTPDF
    echo `date +%T.%N` Splitting PDF...

    pdftk $FN burst output $FN\_singlepage_%03d.pdf
    convert +dither -density 209.10x196 $FN\_singlepage_*.pdf 
-colorspace GRAY -rotate "-90>" -quality 100 $FN\_%03d.png
    rm $FN\_singlepage_*.pdf

    convert +antialias +dither $FN\_*.png -adjoin -modulate 80 -level 
30% -white-threshold 85% -black-threshold 20% -dither -monochrome -page 
A4 $FN\.out.pdf
    rm $FN\_*.png

    echo `date +%T.%N` I am done.

[...]

Kind regards, Konrad


Alexander Busam wrote:
> Hello,
>
> I'm using Hylafax to send a fax via email (postfix).
>
> How can I resize or shrink a pdf-document automaticaly to the paper size 
> e. g. A4 ?
>
> Thanks for help :-)
>
> Regards, Alex
>
>
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