Public bug reported:

I have a PDF-file that, when being cropped by "pdfcrop", is always
cropped at the top by 28 pts more than expected.

For example

    pdfcrop --margins "-734 -14 -43 -42" that.pdf out1.pdf

acts as if I specified "-734 -42 -43 -42".

Trivial

   pdfcrop --margins "0 0 0 0" that.pdf out2.pdf

doesn't leave the PDF intact but removes the 28pt stripe from the top.

Interesting that cutting "0 0 0 0" again, i.e.

   pdfcrop --margins "0 0 0 0" out2.pdf out3.pdf

doesn't seem to change anything.

I'm not an expect, but I see nothing special in the original PDF file
(that.pdf). The "pdfinfo" says for it:

    Creator:        Adobe InDesign 14.0 (Windows)
    Producer:       Adobe PDF Library 15.0
    CreationDate:   Wed Aug 28 13:53:19 2019 EEST
    ModDate:        Wed Aug 28 13:53:21 2019 EEST
    Tagged:         no
    UserProperties: no
    Suspects:       no
    Form:           none
    JavaScript:     no
    Pages:          1
    Encrypted:      no
    Page size:      1275.59 x 788.031 pts
    Page rot:       0
    MediaBox:           0.00     0.00  1275.59   788.03
    CropBox:            0.00     0.00  1275.59   788.03
    BleedBox:           0.00     0.00  1275.59   788.03
    TrimBox:            0.00     0.00  1275.59   788.03
    ArtBox:             0.00     0.00  1275.59   788.03
    File size:      910760 bytes
    Optimized:      no
    PDF version:    1.4

Passing that PDF through pdftk or qpdf (before using pdfcrop) doesn't
change anything (neither in PDF appearance nor in pdfcrop behavior).

I can provide that PDF file, but I prefer to do it privately (there's
nothing secret in it, just I'm not sure whether the copyright owner will
be happy if I share public it for everyone).

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: texlive-extra-utils 2019.202000218-1
ProcVersionSignature: Ubuntu 5.4.0-58.64-generic 5.4.73
Uname: Linux 5.4.0-58-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Thu Dec 24 17:06:56 2020
InstallationDate: Installed on 2020-03-04 (294 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200304)
PackageArchitecture: all
SourcePackage: texlive-extra
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: texlive-extra (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

** Summary changed:

- The "pdfcrop" utility crops an extra space on the top
+ The "pdfcrop" utility crops an extra space at the top

** Description changed:

  I have a PDF-file that, when being cropped by "pdfcrop", is always
  cropped at the top by 28 pts more than expected.
  
  For example
  
-     pdfcrop --margins "-734 -14 -43 -42" that.pdf out1.pdf
+     pdfcrop --margins "-734 -14 -43 -42" that.pdf out1.pdf
  
  acts as if I specified "-734 -42 -43 -42".
  
  Trivial
  
-    pdfcrop --margins "0 0 0 0" that.pdf out2.pdf
+    pdfcrop --margins "0 0 0 0" that.pdf out2.pdf
  
  doesn't leave the PDF intact but removes the 28pt stripe from the top.
  
  Interesting that cutting "0 0 0 0" again, i.e.
  
-    pdfcrop --margins "0 0 0 0" out2.pdf out3.pdf
+    pdfcrop --margins "0 0 0 0" out2.pdf out3.pdf
  
  doesn't seem to change anything.
  
  I'm not an expect, but I see nothing special in the original PDF file
  (that.pdf). The "pdfinfo" says for it:
  
-     Creator:        Adobe InDesign 14.0 (Windows)
-     Producer:       Adobe PDF Library 15.0
-     CreationDate:   Wed Aug 28 13:53:19 2019 EEST
-     ModDate:        Wed Aug 28 13:53:21 2019 EEST
-     Tagged:         no
-     UserProperties: no
-     Suspects:       no
-     Form:           none
-     JavaScript:     no
-     Pages:          1
-     Encrypted:      no
-     Page size:      1275.59 x 788.031 pts
-     Page rot:       0
-     MediaBox:           0.00     0.00  1275.59   788.03
-     CropBox:            0.00     0.00  1275.59   788.03
-     BleedBox:           0.00     0.00  1275.59   788.03
-     TrimBox:            0.00     0.00  1275.59   788.03
-     ArtBox:             0.00     0.00  1275.59   788.03
-     File size:      910760 bytes
-     Optimized:      no
-     PDF version:    1.4
+     Creator:        Adobe InDesign 14.0 (Windows)
+     Producer:       Adobe PDF Library 15.0
+     CreationDate:   Wed Aug 28 13:53:19 2019 EEST
+     ModDate:        Wed Aug 28 13:53:21 2019 EEST
+     Tagged:         no
+     UserProperties: no
+     Suspects:       no
+     Form:           none
+     JavaScript:     no
+     Pages:          1
+     Encrypted:      no
+     Page size:      1275.59 x 788.031 pts
+     Page rot:       0
+     MediaBox:           0.00     0.00  1275.59   788.03
+     CropBox:            0.00     0.00  1275.59   788.03
+     BleedBox:           0.00     0.00  1275.59   788.03
+     TrimBox:            0.00     0.00  1275.59   788.03
+     ArtBox:             0.00     0.00  1275.59   788.03
+     File size:      910760 bytes
+     Optimized:      no
+     PDF version:    1.4
+ 
+ Passing that PDF through pdftk or qpdf (before using pdfcrop) doesn't
+ change anything (neither in PDF appearance nor in pdfcrop behavior).
  
  I can provide that PDF file, but I prefer to do it privately (there's
- nothing secret in it, just I'm not sure if the copyright owner will be
- happy if I public it for everyone).
- 
- Passing this PDF through pdftk or qpdf before using pdfcrop doesn't
- change anything (neither in PDF appearance nor in pdfcrop behavior).
+ nothing secret in it, just I'm not sure whether the copyright owner will
+ be happy if I share public it for everyone).
  
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: texlive-extra-utils 2019.202000218-1
  ProcVersionSignature: Ubuntu 5.4.0-58.64-generic 5.4.73
  Uname: Linux 5.4.0-58-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.14
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: KDE
  Date: Thu Dec 24 17:06:56 2020
  InstallationDate: Installed on 2020-03-04 (294 days ago)
  InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200304)
  PackageArchitecture: all
  SourcePackage: texlive-extra
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1909242

Title:
  The "pdfcrop" utility crops an extra space at the top

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