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Screencasting library

Project Description


Castro is a library for recording automated screencasts via a simple API.

Here’s an example:

>>> from castro import Castro
>>> c = Castro()
>>> c.start()
>>> # Do something awesome!
>>> c.stop()


1) Install and launch a vncserver. (Hint: Google it.)
2) $ [sudo] easy_install castro
3) There's no step 3!


$ python -c "import castro; castro.test()"


Video stored in: <default_temp_dir>/castro-video.swf

Video player stored in: <default_temp_dir>/castro-video.html


$ firefox /tmp/castro-video.html

License & Repository

Castro was created by Jason Huggins. It is licensed under the GPLv2, since it is a derivative work of pyvnc2swf, which is also licensed under the GPLv2.

Castro has a git respository at


Castro is a minor fork of pyvnc2swf, allowing one to use pyvnc2swf as a regular Python library, instead of a Tk GUI application or command line utility.

The specific improvement Castro brings to pyvnc2swf is the ability to start and stop recording programmatically via a simple Python API. Castro uses a file-based IPC to tell pyvnc2swf when to stop recording.

Ordinarily, pyvnc2swf’s command line utility,, expects users to stop recording by manually typing “Control-C”, sending a KeyboardInterrupt and allowing the process to exit cleanly. On Linux, emulating KeyboardInterrupt is simple enough to do by sending a SIGINT signal. But this does not work cross- platform, specifically on Windows. And a big reason for using pyvnc2swf is its ability to record vnc video on any platform from any platform.


  • Python - 2.5 or above

  • Pygame - 1.6 or above

  • PyYAML - 3.09 or above

    Python < 2.6 dependencies:

  • Multiprocessing - 2.6.21 or above

  • Simplejson - 2.0.9 or above

    Non-python dependencies (for cleaning/editing .flv videos):

  • flvtool2 (ruby gem)

  • ffmpeg


  • 1.0.4 - Added post-recording processing methods. (Depends on ffmpeg and flvtool2)
  • 1.0.3 - Switched from processing library to multiprocessing.
    Added support for changing recording framerate.
  • 1.0.2 - Made stop() block until the recording process is done
    Added support to use Castro in a with statement (e.g “with video(…):”)
  • 1.0.1 - Fixed default vnc password path
  • 1.0 - First Release

Release History

This version
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Filename, Size & Hash SHA256 Hash Help File Type Python Version Upload Date
(127.8 kB) Copy SHA256 Hash SHA256
Egg 2.6 Apr 12, 2011
(46.4 kB) Copy SHA256 Hash SHA256
Source None Apr 12, 2011

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