vidwhacker(6) XScreenSaver manual vidwhacker(6) NAME vidwhacker - grab images and apply random filters to them SYNOPSIS vidwhacker [--display host:display.screen] [--root] [--window-id num- ber][--verbose] [--stdin] [--stdout] [--delay seconds] [-directory direc- tory] [--fps] DESCRIPTION Distorts an image using a random series of filters: edge detection, sub- tracting the image from a rotated version of itself, etc. Selection of random image files is done by running the xscreensaver-getim- age-file(6) program. Capture of video frames (if requested) is done by running the xscreensaver-getimage-video(6) program. OPTIONS vidwhacker accepts the following options: --root Draw on the root window. This is the default. --window-id number Draw on the specified window. --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 re- sources stored in the RESOURCE_MANAGER property. XSCREENSAVER_WINDOW The window ID to use with --root. BUGS It is poorly named; originally it worked only on grabbed video frames, be- fore being expanded to work on any image. It requires the various PBM tools, e.g., ppmrelief(1). Though still avail- able, the "pbmplus" suite has largely fallen out of favor these days, so it would be nice if someone were to port this script to make use of Image- Magick's convert(1) instead. That would also probably make it faster. SEE ALSO X(1), xscreensaver(1), xscreensaver-getimage(6), xscreensaver-getim- age-file(6), xscreensaver-getimage-video(6), ppmtogif(1), convert(1) COPYRIGHT Copyright (C) 1998-2001 by Jamie Zawinski. Permission to use, copy, mod- ify, distribute, and sell this software and its documentation for any pur- pose is hereby granted without fee, provided that the above copyright no- tice appear in all copies and that both that copyright notice and this per- mission notice appear in supporting documentation. No representations are made about the suitability of this software for any purpose. It is pro- vided "as is" without express or implied warranty. AUTHOR Jamie Zawinski <jwz@jwz.org>, 18-Jan-98. X Version 11 6.15 (30-Mar-2026) vidwhacker(6)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | BUGS | SEE ALSO | COPYRIGHT | AUTHOR
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