R: 'gm convert' in 1.5 and 1.7

[Marco Atzeri <marco_atzeri at yahoo dot it>]

> Da: Angelo Graziosi 
> Oggetto: 'gm convert' in 1.5 and 1.7
> A: "Cygwin" <cygwin cygwin.com>
> Data: Sabato 3 ottobre 2009, 17:16
> I have noticed different results in
> size using 'gm convert', from JPG to PDF, in Cygwin 1.5 and
> in 1.7. For example, in Cygwin-1.5
> 
> $ gm convert -page 595x842! test.jpg test.jpg.pdf
> 
> $ ls -lrt
> [...]
> -rw-r--r--? 1 graziosi Users? ? 351268
> Sep? 6? 2008 test.jpg
> -rw-r--r--? 1 graziosi Users? ? 296578
> Oct? 3 16:49 test.jpg.pdf
> 
> 
> On Cygwin-1.7:
> 
> $ gm convert -page 595x842! test.jpg test.jpg.pdf
> 
> $ ls -lrt
> [...]
> -rw-r--r--? 1 graziosi Users? 351268? 6
> Sep? 2008 test.jpg
> -rw-r--r--? 1 graziosi Users 1524227? 3 Oct 16:50
> test.jpg.pdf
> 
> So, on 1.5, 'test.jpg.pdf' has a size of 292K, instead on
> 1.7 it has a size of 1.5M!
> 
> Why this difference?
> 
> I have attached a simple test case with which one should
> reproduce the things, but this big discrepancy happens with
> all JPG files I have tried.
> 
> I discovered the above trying to convert many JPG files to
> PDF and then creating a single PDF with 'pdftk'. But on
> Cygwin 1.7 the resulting final PDF is very very big (image
> 100 JPGs...)!!
> 

as workaround try 

gm convert -compress jpeg test.jpg test2.pdf


> 
> Cheers,
> Angelo.

Regards
Marco






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