pdftk压缩选项 [英] pdftk compression option

问题描述

我使用 pdftk 使用以下命令行压缩pdf。

  pdftk file1.pdf输出file2.pdf compress 
  

它的作用是我的文件的权重减少。

有[选项]可以更改压缩吗？

？它很重，因为一些图形有很多点。有没有办法将这些图形转换为jpg实例和适应压缩？

解决方案

我有同样的问题，不同的解决方案（有关详情，请参阅此主题）。

• 像素化（有损）：

    convert input.pdf -compress Zip output.pdf 
    




• 未像素化（无损，但可能略有不同）：

    gs -sDEVICE = pdfwrite -dCompatibilityLevel = 1.4 -dPDFSETTINGS = / screen -dNOPAUSE -dBATCH -dQUIET -sOutputFile = output.pdf input.pdf 
    

编辑：我刚刚发现了另一个选项（用于无损压缩），避免了令人讨厌的gs命令。 qpdf 是一个整洁的工具，可以转换PDF（压缩/解压缩，加密/解密），并且比gs命令快得多：

  qpdf --linearize input.pdf output.pdf 
  
I use pdftk to compress a pdf using the following command line
pdftk file1.pdf output file2.pdf compress
It works as the weight of my file decreased. 

Are there [options] to change the compression???

Or maybe other solutions to compress my file? It is heavy because some graphics have a lot of points. Is there a way to convert these graphs to jpg for instance and adapt the compression?
解决方案
I had the same problem and found two different solutions (see this thread for more details). Both reduced the size of my uncompressed PDF dramatically.


Pixelated (lossy): 
convert input.pdf -compress Zip output.pdf

Unpixelated (lossless, but may display slightly differently):
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dBATCH  -dQUIET -sOutputFile=output.pdf input.pdf



Edit: I just discovered another option (for lossless compression), which avoids the nasty gs command. qpdf is a neat tool that converts PDFs (compression/decompression, encryption/decryption), and is much faster than the gs command:
qpdf --linearize input.pdf output.pdf


                        
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