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Slice up PDFs like a pro.

Project description

Slice up PDFs like a pro:

% python my-fancy-file.pdf --pages 1 3 5 6 10 --angle 30 --zoom 1.6

bocho takes a PDF file and creates a “stacked page” preview from a selection of pages.

It accepts a bunch of options for customising the output (pass the -h flag for details).


Requires ImageMagick and the contents of requirements.txt, e.g:

% sudo apt-get install libmagickwand-dev
% pip install -r requirements.txt

On OS X, it’s a bit more complicated:

% brew install ghostscript
% brew install imagemagick
% ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install --allow-external pyPdf --allow-unverified pyPdf -r requirements.txt


  • implement rotation properly ✓
  • allow a “zoom” option ✓
  • optional drop-shadows ✓
  • make shadows smarter in their orientation (they’re currently uniform, not respecting the angle / affine transformation)
  • make the basic edge separators optional ✓
  • automatic spacing as an option as well as fixed pixel spacing
  • horizontal and vertical spacing ✓
  • horizontal and vertical offsets ✓
  • optional right-to-left stacking ✓
  • handle non-A4 aspect ratio input documents ✓
  • optionally apply transforms:
    • affine ✓ (basic, subtle, non-configurable)
    • perspective
  • ensure sliced PNGs are large enough when custom width / height are specified
  • fix x and y spacing calculation to account for any applied rotation & transformation
  • allow transforms to be configurable (probably with presets defined in an .ini file)
  • drop the PyPDF dependency ✓
  • use an ImageMagick binding rather than using subprocess to call convert ✓ (Wand)
  • optionally re-use pages between runs ✓
  • allow user-specified resolution for the PDF to PNG conversion ✓
  • docs ✓
  • pretty pictures illustrating the effect of the various options

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