LyX ⇒ Lyx document - smaller PDF file ?

[fcochard]

Hello all,

I'm wirting a technical documentation with Lyx, and I'm facing a problem: when I generate the PDF file, it is huge (more than 50Mo for 70+ pages). This is due to the high number of pictures, but also to the resolution of the PDF file - I guess 600 dpi. However, I've not been able to find how I can reduce the PDF resolution (150 dpi or even less would be OK).

Any idea ?

I work on Ubuntu 10.10 64bits, with Lyx 1.6.7. I've created my own class.

Many thanks in advance for your help,

Regards,

François

[Stefan Kottwitz]

Hi François,

welcome to the board!

• You could try in your document preamble:
  

  Code: Select all

  \pdfminorversion=5
  \pdfobjcompresslevel=3 
  \pdfcompresslevel=9

  Ir requires PDF readers supporting PDF 1.5.
• Or have a look at pdfsizeopt.
• You could also try XeLaTeX instead of pdfLaTeX and compare the results.

Stefan

[fcochard]

Hi Stefan,

Many thanks for your quick reaction !

But... I tried, in vain:
- If I put the given commands in the Lyx preamble, I've an error message : \pdfminorversion cannot be changed after data is written.
- If I put the commands in my class file (.cls file), I've no more error, but the result is similar (more than 50Mo), even if I change the compression value (1 to 9)...

Regarding pdfsizeopt... hum... looks complex to install... (:<).

XeLatex : I don't have this option in the exporting format list (in Lyx)... how can I setup it ?

I hope you can still help (;>)

Regards,

François

[fcochard]

Hello all,

I finally found a simple way, using ghostscript to optimize file size.
The command is :

Code: Select all

gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=out.pdf fichierAComprimer.pdf

The result is a file 5x smaller than original one, without visible quality decrease.

I hoped to find a way to generate a smaller file, but this is a valuable workaround for me - until I find a solution at the source.

Regards,

François