Using GhostScript to get page size

Question

Is it possible to get the page size (from e.g. a PDF document page) using GhostScript? I have seen the \"bbox\" device, but it returns the bounding box (it differs per page)

Answer 1

A solution in pure GhostScript PostScript, no additional scripts necessary:

gs -dQUIET -sFileName=path/to/file.pdf -c "FileName (r) file runpdfbegin 1 1 pdfpagecount {pdfgetpage /MediaBox get {=print ( ) print} forall (\n) print} for quit"

The command prints the MediaBox of each page in the PDF as four numbers per line. An example from a 3-page PDF:

0 0 595 841
0 0 595 841
0 0 595 841

Here's a breakdown of the command:

FileName (r) file  % open file given by -sFileName
runpdfbegin        % open file as pdf
1 1 pdfpagecount { % for each page index
  pdfgetpage       % get pdf page properties (pushes a dict)
  /MediaBox get    % get MediaBox value from dict (pushes an array of numbers)
  {                % for every array element
    =print         % print element value
    ( ) print      % print single space
  } forall
  (\n) print       % print new line
} for
quit               % quit interpreter. Not necessary if you pass -dBATCH to gs

Replace /MediaBox with /CropBox to get the crop box.