用GhostScript裁剪PDF页面

hbghlyj

今天终于搞明白了.
第一步

1. sed -i 's/CropBox/cropbox/' input.pdf

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把原pdf的CropBox值弄掉(且保持字符数不变)见stackoverflow.com/questions/5797841

answer to Cropping a PDF using Ghostscript 9.01 says that command line argument /CropBox is ignored if it's already defined in the file. Workaround is to preprocess the file and change case, e.g. /crOPbOX so the internal setting is ignored.

第二步 用gsview32.exe (Windows) / gv (Linux) 打开PDF [默认单位1 pt = 1/72 in]

左下角坐标xmin ymin = 114 293	右上角坐标xmax ymax = 329 496

第三步 添加边框值 [xmin ymin xmax ymax] 不用转换单位(因为gsview是GhostScript配套阅读器)

1. gs -o output.pdf -sDEVICE=pdfwrite -c "[/CropBox [114 293 329 496] /PAGES pdfmark" -f input.pdf

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成功!
input.pdf (94.81 KB, Downloads: 61)

2023-3-9 00:08 Upload

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output.pdf (32.81 KB, Downloads: 61)

2023-3-9 00:08 Upload

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hbghlyj

在ghostgum可以下载GSView 5 但与最新版GhostScript不兼容!
但最新版本GSView 6不知在哪里才能下载. wisc提供的链接gsview.com/显示

Artifex is announcing end of life for GSView 6.0. Support will no longer be available.

GSView官方不再支持.
根据StackOverflow需要Ghostscript version 9.52
在官方GitHub找到了下载地址gs952w64.exe

hbghlyj

打开这个PDF时GSView会报错:
input.pdf (29.79 KB, Downloads: 61)

2023-3-30 01:31 Upload

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参考StackOverflow

1. "C:\Program Files\gs\gs9.52\bin\gswin64.exe" -sDEVICE=pdfwrite  -dNoOutputFonts -sOutputFile=output.pdf input.pdf

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把字体换成图形, 就能用GSView打开了:
output.pdf (154.23 KB, Downloads: 63)

2023-3-30 01:31 Upload

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但是文件变大