Apps
Description:

krop is a simple graphical tool to crop the pages of PDF files.

It is written in Python and relies on PyQT, python-poppler-qt4 and pyPDF for its functionality.

A unique feature of krop is its ability to automatically split pages into subpages to fit the limited screen size of devices such as eReaders. This is particularly useful, if your eReader does not support convenient scrolling.

Further information and instructions can be found at http://arminstraub.com/software/krop
Last changelog:

krop (0.5.0) 2018-02-11 -- Armin Straub 3 months ago

+ Support PyQt5.
+ Use Ghostscript to optionally optimize the final PDF (thanks to Mathias Rav for the idea and code).

20 comments
 Comments

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roctheme

2 years ago

krop crash, if I try to open krop directly with a file. E.g. via right click menu.

in terminal it works:
krop <filename>

ProblemType: Crash
CurrentDesktop: KDE
Date: Tue Aug 11 08:57:21 2015
ExecutablePath: /usr/share/krop/krop.py
ExecutableTimestamp: 1400944165
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python /usr/bin/krop /home/user/File.pdf
ProcCwd: /home/user
ProcEnviron:
LANGUAGE=de
PATH=(custom, user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash

...

krop.py crashed with TypeError in main(): decode() argument 1 must be string, not None

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C

arminstraub

2 years ago

Thanks for the report!

The following should fix the crash: in krop.py, replace the line
fileName = args.file.decode(sys.stdin.encoding)
with
fileName = args.file.decode(sys.stdin.encoding or sys.getdefaultencoding())
Please let me know if this does not work as intended.

This change will be included in the next update of krop.

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roctheme

2 years ago

It works!

Thank you!

Great App.

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epsilom

3 years ago

Thanks for this app this is very useful!, I have one wish: please do that the pointer mouse change when over edge icons/markers of mergin to cut, and make those markers more bigger. This would be easier when I want change the selection margins

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arminstraub

2 years ago

Thank you for the helpful suggestions! I hope you like the improved visibility of the selections and handles in the new version 0.4.8.

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Putin

3 years ago

can you include the mainwindow.ui file to the source code ?

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arminstraub

3 years ago

Added to the source files in the new version 0.4.7. Have fun!

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OdinEidolon

4 years ago

krop /mnt/usbpen/images/all_ALL_all_ALL.pdf
Traceback (most recent call last):
File "/usr/bin/krop", line 19, in <module>
krop.krop.main()
File "/usr/lib/python2.7/site-packages/krop/krop.py", line 54, in main
from mainwindow import MainWindow
File "/usr/lib/python2.7/site-packages/krop/mainwindow.py", line 30, in <module>
from vieweritem import ViewerItem
File "/usr/lib/python2.7/site-packages/krop/vieweritem.py", line 20, in <module>
from popplerqt4 import Poppler
RuntimeError: the sip module implements API v11.0 but the popplerqt4 module requires API v10.1

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arminstraub

4 years ago

The last line of your output suggests that popplerqt4 is not correctly setup on your system. Try typing "from popplerqt4 import Poppler" at a python command line to see if you get an error.

Not sure what may have caused the problem; does the suggestion at https://groups.google.com/forum/#!topic/frescobaldi/ViHxQpW4470 make sense to you?

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OdinEidolon

4 years ago

Hi, thanks for this little nifty program, works very well.

I also have the bug which prevents Krop to be used via the right-clivk "open with" menu.

Three more suggestions in order of importance:
1) Provide a way to allow to crop many different pdf files with the same cropping geometry/selection. Or at least speed up the process. (eg: option to remember output folder and cropping region for the next file, and button to open the next file in the working folder)

2)Provide a button to automatically select a region without having to do it manually. Okular does have such a button that says "trim margins".

3)Krop seems to forget, if closed and reopened, the last opened files and their folder.

Thank you!

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arminstraub

4 years ago

Thank you for the comments! I like your suggestions and plan to address them in the next version (which will probably be a few weeks down the road of time).

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arminstraub

4 years ago

Version 0.4.6 now has your item (2) covered, but I have not yet gotten around to items (1) and (3).

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nitsnatsnok

4 years ago

In Kubuntu 12.04, i can't open files using the "Open" button in the GUI - opening the same files using the terminal (krop file.pdf) works great. Here's the error thats shown when I start krop in the terminal and try to open a file:

UnicodeEncodeError: 'ascii' codec can't encode character u'\xe4' in position 26: ordinal not in range(128)

Great program, thanks a lot!!!

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arminstraub

4 years ago

Could you please try if the updated version (now 0.4.5) fixes your issue?

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roctheme

4 years ago

Waiting so long for a good pdf cropping tool.

Debian Package work with Kubuntu 13.04 too.

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roctheme

4 years ago

Note, command line option [file] doesn't work on Kubuntu.

e.g.: krop /home/user/Dokumente/test.pdf

krop: Unexpected argument '/home/user/Dokumente/test.pdf'.
krop: Use --help to get a list of available command line options.

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arminstraub

4 years ago

Thanks for the kind words!
The bug you mention will be fixed in the next version.
(To fix this silly regression right now you can replace the line 'KCmdLineArgs.init (sys.argv, aboutData)' in krop.py by the line 'KCmdLineArgs.init(aboutData)'.)

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roctheme

4 years ago

Thanks,

KCmdLineArgs.init(aboutData) fixes the command line problem in Kubuntu.

context menu "open with->krop" now work too in Dolphin.

Note, krop has no icon in Kubuntu. Perhaps you can use this system icon:
Icon=edit-cut

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C

arminstraub

4 years ago

Nice suggestion! The edit-cut icon is now used in version 0.4.3.

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cgonzalez

4 years ago

I have a Nook 1st Generation to and I was looking for an application like this. Thank you!

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krop (0.5.0) 2018-02-11 -- Armin Straub 3 months ago

+ Support PyQt5.
+ Use Ghostscript to optionally optimize the final PDF (thanks to Mathias Rav for the idea and code).

krop (0.4.13) 2017-07-22 -- Armin Straub 10 months ago

+ Added the command line option --go, which outputs a PDF using the choices
from --autotrim, --rotate and --whichpages, without opening the krop GUI
(thanks to Mirko Weihrauch for the idea).
+ Padding for auto trimming can be specified as in CSS using one to four
values. This option is now also available on the command line as
--autotrim-padding. (Thanks to Jonah Langlieb for providing sanity checks!)
* Fix incorrect string handling when opening files from the command line
using python3 (thanks to Giuliano Costantini for observing and fixing this).

krop (0.4.12) 2017-01-22 -- Armin Straub 1 year ago

* Use CropBox instead of MediaBox when determining the region to be cropped (thanks to Tim Mueller for observing and fixing this).
* Use a more proper Python package structure (thanks to Xavier Corredor Llano for advice).

krop (0.4.11) 2016-08-29 -- Armin Straub 1 year ago

* Make krop compatible with both python2 and python3.

4 years ago

krop (0.4.10) 2016-05-29 -- Armin Straub

* When cropping, all PDF page boxes (ArtBox, BleedBox, CropBox, MediaBox,
TrimBox) are now adjusted.


krop (0.4.9) 2015-10-31 -- Armin Straub

* Reading PDF files is less strict now. As a consequence, krop doesn't give
up cropping some files which resulted in an error before.
* Fix a possible crash when starting krop.


krop (0.4.8) 2015-07-04 -- Armin Straub

+ More options are accessible via command line arguments.
* Mouse cursor now changes when over selections and handles.
* Improved visibility of selections.


krop (0.4.7) 2015-02-15 -- Armin Straub

+ Basic options are accessible as command line arguments (run krop with
--help to see available options).
* When pressing ctrl-c in the terminal, krop will shut down (not gracefully,
though; only intended for when there is trouble).
* Avoid hitting Python's recursion limit in the pyPdf library when working
with certain large pdf files (thanks to Victor).


krop (0.4.6) 2014-05-24 -- Armin Straub

+ Added option to specify pages which require individual selections (thanks
to Roger Krebs for the suggestion and for testing).
* 'Trim Margins' automatically creates a region for the full page if no
regions exist.
* Reorganized options across tabs.
+ Added appdata file (thanks to Richard Hughes).


krop (0.4.5) 2014-02-01 -- Armin Straub

* Load and write files with non-ascii characters in their filename.


krop (0.4.4) 2013-08-18 -- Armin Straub

+ If available use PyPDF2 in place of pyPdf.
* Correctly crop PDFs which have orientation other than 'portrait' (thanks
to Gaetano Pepe for sending sample PDFs and testing).
* In case of more than one selection per page, cropping is much faster now
and results in smaller files.
* Delete old selections when opening a new file.


krop (0.4.3) 2013-08-10 -- Armin Straub

* Fix a bug that prevented PDF files to be specified on the command line
(thanks to roctheme for reporting).
* Instead of no icon at all, use the system icon 'edit-cut' as application
icon (thanks to roctheme for the suggestion).


krop (0.4.2) 2013-08-04 -- Armin Straub

+ Use PyKDE if available (though this is not really used yet).
* If default icons are missing, use text instead.


krop (0.4.1) 2013-07-28 -- Armin Straub

* Initial public release.
+ Several small bug fixes.


krop (0.4.0) 2013-06-16 -- Armin Straub

* Rewrote cropping code, resulting in much smaller pdf files.

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updated Feb 11 2018
added Jul 29 2013
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