pdf - Get number of pages in a Folder of every pdf and extract only part of pdf when bigger than 30 sites

Question

is there a way to filter out all pds in a folder that have more than 30 pages like qpdf --pages *.pdf and when a documant have more than 30 pages, then extract only the first and last page and generate a new pdf with the first and last site of bevore created pdfs? thx

Answer 1

根据手册，--show-npages用于计算页数，应该只输出数字。使用for /f循环将其捕获到变量中。换一个for来处理每个 PDF：

@echo off
for %%F in (*.pdf) do (
  for /f %%A in ('qpdf --show-npages "%%f"`) do (
    if %%A gtr 30 (
       qpdf "%%F" --pages 1,r1 -- "%%~dpnF-firstlast.%%~xF"
    )
  )
)

（完全未经测试，因为我只知道qpdf手册，我刚刚找到）