[asterisk-users] SendFAX - multi-page TIFF

[Steve Underwood]

On 10/07/2012 04:56 PM, Mikhail Lischuk wrote:
>
> Gabriel Ortiz Lour писал 06.10.2012 17:07:
>
>> I am using this command to generate the TIFF from a PDF:
>>
>> /usr/bin/gs -q -sDEVICE=tiffg3 -sPAPERSIZE=a4 -r204x196 -dNOPAUSE 
>> -sOutputFile=$tiffFile -- $pdfFile
>>
> I use imagemagic's convert instead of gs, for gs gave me lots of 
> problems I had no time to debug:
>
> /usr/local/bin/convert -density 204x98 -resize 1728x1346 -units 
> pixelsperinch -monochrome -compress Fax $timestamp.pdf $timestamp.tif
>
> And it works perfectly with multipage PDFs
>
>
imagemagic just calls gs to do the actual work. The command you gave 
will not give you reliable conversion. It will work a lot of the time, 
to produce a low resolution FAX image. However, if you have large images 
in your PDF they can cause the output image size to change sometimes.

The commands you will find at 
http://www.soft-switch.org/spandsp_faq/ar01s14.html will reliably 
produce standard, fine, and superfine image files in the various common 
FAX formats.

Steve