vidwhacker(6x)
NAME
vidwhacker - grab images and apply random filters to them
SYNOPSIS
vidwhacker [-display host:display.screen] [-root] [-verbose] [-stdin] [-stdout] [-delay seconds] [-directory directory] [-fps]
DESCRIPTION
The vidwhacker program grabs an image from disk, or from the system's video input, then applies random image filters to it, and displays the result. The vidwhacker program does not terminate until killed. It depends heavily on the various PBM tools (e.g., ppmrelief(1).) Selection of random image files is done by running the xscreensaver- getimage-file(1) program. Capture of video frames (if requested) is done by running the xscreensaver-getimage-video(1) program. The options of whether to do video, and which directory to search for images, are specified in the ~/.xscreensaver file.
OPTIONS
vidwhacker accepts the following options:
-root Draw on the root window. This is the default.
-verbose
Print diagnostics.
-stdin Instead of grabbing an image from disk or video, read an image
to manipulate from stdin. This image must be in ppm(5) format.
The program will still perform repeated random image
transformations, but it will always use this one image as its
starting point.
-delay seconds
How long to sleep between images. Default 5 seconds (the
actual elapsed time is significantly longer, due to processing
time.)
-stdout Instead of displaying the image on a window or on the root,
write the new image on stdout, and exit.
-directory directory
Use this directory instead of the imageDirectory specified in
the ~/.xscreensaver file.
-fps Display the current frame rate and CPU load.
ENVIRONMENT
DISPLAY to get the default host and display number.
XENVIRONMENT
to get the name of a resource file that overrides the global
resources stored in the RESOURCE_MANAGER property.
BUGS
It's slow.
TO DO
It might be interesting to rewrite this to use gimp(1) plugins instead of the pbm tools. It probably wouldn't be any faster, but there would be a wider variety of effects available.
SEE ALSO
X(1), xscreensaver(1), xscreensaver-getimage-file(1), xscreensaver- getimage-video(1), xv(1), ppmtogif(1), cjpeg(1)
COPYRIGHT
Copyright 1998-2001 by Jamie Zawinski. Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. No representations are made about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty.
AUTHOR
Jamie Zawinski <jwz@jwz.org>, 18-Jan-98.
Opportunity
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
Free Books
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Education
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.
