gnychis / pyscreenshot

python screenshot

The pyscreenshot module can be used to copy the contents of the screen to a PIL or Pillow image memory. Replacement for the ImageGrab Module, which works on Windows only. For handling image memory (e.g. saving to file, converting,..) please read PIL or Pillow documentation.

Links:

• home: https://github.com/ponty/pyscreenshot
• documentation: http://pyscreenshot.readthedocs.org
• PYPI: https://pypi.python.org/pypi/pyscreenshot

Goal:

Pyscreenshot tries to allow to take screenshots without installing 3rd party libraries. It is cross-platform but useful for Linux based distributions. It is only a pure Python wrapper, a thin layer over existing back-ends. Its strategy should work on most Linux distributions: a lot of back-ends are wrapped, if at least one exists then it works, if not then one back-end should be installed. Performance and interactivity are not important for this library.

Features:

• Cross-platform wrapper
• Capturing the whole desktop
• Capturing an area
• saving to PIL or Pillow image memory
• some back-ends are based on this discussion: http://stackoverflow.com/questions/69645/take-a-screenshot-via-a-python-script-linux
• pure Python library
• supported python versions: 2.6, 2.7, 3.3, 3.4, 3.5

• Plugin based, it has wrappers for various back-ends:

  • scrot
  • ImageMagick
  • PyGTK
  • PIL or Pillow (only on windows)
  • PyQt4
  • wxPython
  • Quartz (Mac)
  • screencapture (Mac)

• time: 0.1s - 1.0s

Known problems:

• ImageMagick creates blackbox on some systems
• PyGTK back-end does not check $DISPLAY -> not working with Xvfb

Similar projects:

• http://sourceforge.net/projects/gtkshots/
• http://pypi.python.org/pypi/autopy

Examples

grab and show the whole screen:

#-- include('examples/showgrabfullscreen.py') --#
import pyscreenshot as ImageGrab

if __name__ == "__main__":
    # fullscreen
    im=ImageGrab.grab()
    im.show()
#-#

to start the example:

python -m pyscreenshot.examples.showgrabfullscreen

grab and show the part of the screen

#-- include('examples/showgrabbox.py')--#
import pyscreenshot as ImageGrab

if __name__ == "__main__":
    # part of the screen
    im=ImageGrab.grab(bbox=(10,10,510,510)) # X1,Y1,X2,Y2
    im.show()
#-#

to start the example:

python -m pyscreenshot.examples.showgrabbox

Installation

General

• install pip

• install PIL or Pillow

• install at least one back-end

• install the program:

  # as root
  pip install pyscreenshot
  

Ubuntu 14.04

sudo apt-get install python-pip
sudo apt-get install python-pil
sudo pip install pyscreenshot
# optional back-ends
sudo apt-get install scrot imagemagick python-gtk2 python-qt4 python-wxgtk2.8
# optional for examples
sudo pip install entrypoint2

Uninstall

# as root
pip uninstall pyscreenshot

Command line interface

Back-end performance:

The performance can be checked with pyscreenshot.check.speedtest.

Example:

#-- sh('python -m pyscreenshot.check.speedtest --virtual-display 2>/dev/null') --#

n=10   to_file: True   bounding box: None
------------------------------------------------------
wx                    1.3  sec        (  130 ms per call)
pygtk                 1    sec        (  100 ms per call)
pyqt                  1.1  sec        (  109 ms per call)
scrot                 0.71 sec        (   70 ms per call)
imagemagick           0.64 sec        (   64 ms per call)

n=10   to_file: False  bounding box: None
------------------------------------------------------
wx                    1.1  sec        (  109 ms per call)
pygtk                 1.3  sec        (  126 ms per call)
pyqt                  1.4  sec        (  135 ms per call)
scrot                 0.94 sec        (   94 ms per call)
imagemagick           0.78 sec        (   78 ms per call)

n=10   to_file: False  bounding box: (10, 10, 20, 20)
------------------------------------------------------
wx                    1    sec        (  101 ms per call)
pygtk                 0.62 sec        (   61 ms per call)
pyqt                  1.3  sec        (  127 ms per call)
scrot                 0.87 sec        (   87 ms per call)
imagemagick           0.58 sec        (   57 ms per call)
#-#

Print versions:

#-- sh('python -m pyscreenshot.check.versions 2> /dev/null ')--#
pyscreenshot         0.3.4
wx                   2.8.12.1
pygtk                2.28.6
pyqt                 not implemented
scrot                0.8
imagemagick          6.7.7
#-#

command line help

#-- sh('python -m pyscreenshot.check.speedtest --help')--#
usage: speedtest.py [-h] [-v] [--debug]

optional arguments:
  -h, --help            show this help message and exit
  -v, --virtual-display
  --debug               set logging level to DEBUG
#-#

#-- sh('python -m pyscreenshot.check.versions --help')--#
usage: versions.py [-h] [--debug]

optional arguments:
  -h, --help  show this help message and exit
  --debug     set logging level to DEBUG
#-#