如何合并pdf文件，以便每个文件都以奇数页码开头？

我需要合并几个打z的pdf，我希望所有输入的pdf都以输出pdf的奇数页开始。

示例：A.pdf有3页，B.pdf有4页。我不希望我的输出有7页。我想要的是8页pdf，其中1-3 A.pdf页来自，第4页为空，而5-8页来自B.pdf。我怎样才能做到这一点？

我了解pdftk，但是我在手册页中找不到这样的选项。

如果您愿意编写一些Python ，PyPdf库使这种事情变得容易。将下面的代码保存在一个名为pdf-cat-even（或您喜欢的脚本）的脚本中，使其可执行（chmod +x pdf-cat-even），然后作为过滤器（./pdf-cat-even a.pdf b.pdf >concatenated.pdf）运行。该addBlankPage方法需要pyPdf≥1.13 。

#!/usr/bin/env python
import copy, sys
from pyPdf import PdfFileWriter, PdfFileReader
output = PdfFileWriter()
output_page_number = 0
alignment = 2           # to align on even pages
for filename in sys.argv[1:]:
    # This code is executed for every file in turn
    input = PdfFileReader(open(filename))
    for p in [input.getPage(i) for i in range(0,input.getNumPages())]:
        # This code is executed for every input page in turn
        output.addPage(p)
        output_page_number += 1
    while output_page_number % alignment != 0:
        output.addBlankPage()
        output_page_number += 1
output.write(sys.stdout)

第一步是产生一个空白页的pdf文件。您可以使用许多程序（LibreOffice / OpenOffice，inkscape，（La）TeX，scribus等）轻松完成此操作

然后仅在需要的地方包括这个空白页：

pdftk A.pdf empty_page.pdf B.pdf output result.pdf 

如果要使用脚本自动执行此操作，则可以使用例如pdftk file.pdf dump_data | grep NumberOfPages | egrep -o '[0-9]*'提取页数。

Gilles的回答对我有用，但是由于我必须合并许多文件，因此如果我可以从文本文件中读取它们的名称，则更加方便。我稍微修改了Gilles的代码来做到这一点，也许会对其他人有所帮助：

#!/usr/bin/env python

# requires PyPdf library, version 1.13 or above -
# its homepage is http://pybrary.net/pyPdf/
# running: ./this-script-name file-with-pdf-list > output.pdf

import copy, sys
from pyPdf import PdfFileWriter, PdfFileReader
output = PdfFileWriter()
output_page_number = 0

# every new file should start on (n*alignment + 1)th page
# (with value 2 this means starting always on an odd page)
alignment = 2

listoffiles = open(sys.argv[1]).read().splitlines()
for filename in listoffiles:
    # This code is executed for every file in turn
    input = PdfFileReader(open(filename))
    for p in [input.getPage(i) for i in range(0,input.getNumPages())]:
        # This code is executed for every input page in turn
        output.addPage(p)
        output_page_number += 1
    while output_page_number % alignment != 0:
        output.addBlankPage()
        output_page_number += 1
output.write(sys.stdout)

您也可以使用LaTeX进行此操作（尽管我知道这可能不是您想要的）。类似于以下内容的东西应该起作用：

\documentclass{book}

\usepackage{pdfpages}

\begin{document}

\includepdf[pages=-]{A}
\cleardoublepage % Make sure we clear to an odd page
\includepdf[pages=-]{B} % This inserts all pages. Or you can specify specific pages, a range, or `{}` for a blank page

\end{document}

请注意，\cleardoublepage仅插入带有双面打印类的空白页（例如书本）

pdfpages可以在CTAN上找到更多选项和信息。

这是PyPDF2和python3的代码

#!/usr/bin/env python


# requires PyPdf2 library, version 1.26 or above -
# its homepage is https://pythonhosted.org/PyPDF2/index.html
# running: ./this-script-name output.pdf file-with-pdf-list

import copy, sys
from PyPDF2 import PdfFileWriter, PdfFileReader
output = PdfFileWriter()
output_page_number = 0

# every new file should start on (n*alignment + 1)th page
# (with value 2 this means starting always on an odd page)
alignment = 2

for filename in sys.argv[2:]:
    # This code is executed for every file in turn
    input = PdfFileReader(open(filename, "rb"))
    output.appendPagesFromReader(input)
    output_page_number += input.getNumPages()

    while output_page_number % alignment != 0:
        output.addBlankPage()
        output_page_number += 1

output.write(open(sys.argv[1], "wb"))