1vidwhacker(6x) XScreenSaver manual vidwhacker(6x)
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6 vidwhacker - grab images and apply random filters to them
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9 vidwhacker [-display host:display.screen] [-root] [-verbose] [-stdin]
10 [-stdout] [-delay seconds] [-directory directory] [-fps]
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13 The vidwhacker program grabs an image from disk, or from the system's
14 video input, then applies random image filters to it, and displays the
15 result. The vidwhacker program does not terminate until killed.
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17 It depends heavily on the various PBM tools (e.g., ppmrelief(1).)
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19 Selection of random image files is done by running the xscreen‐
20 saver-getimage-file(6x) program. Capture of video frames (if re‐
21 quested) is done by running the xscreensaver-getimage-video(6x) pro‐
22 gram. The options of whether to do video, and which directory to
23 search for images, are specified in the ~/.xscreensaver file.
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26 vidwhacker accepts the following options:
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28 -root Draw on the root window. This is the default.
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30 -verbose
31 Print diagnostics.
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33 -stdin Instead of grabbing an image from disk or video, read an image
34 to manipulate from stdin. This image must be in ppm(5) format.
35 The program will still perform repeated random image transfor‐
36 mations, but it will always use this one image as its starting
37 point.
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39 -delay seconds
40 How long to sleep between images. Default 5 seconds (the ac‐
41 tual elapsed time is significantly longer, due to processing
42 time.)
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44 -stdout Instead of displaying the image on a window or on the root,
45 write the new image on stdout, and exit.
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47 -directory directory
48 Use this directory instead of the imageDirectory specified in
49 the ~/.xscreensaver file.
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51 -fps Display the current frame rate and CPU load.
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54 DISPLAY to get the default host and display number.
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56 XENVIRONMENT
57 to get the name of a resource file that overrides the global
58 resources stored in the RESOURCE_MANAGER property.
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61 It's slow.
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64 It might be interesting to rewrite this to use gimp(1) plugins instead
65 of the pbm tools. It probably wouldn't be any faster, but there would
66 be a wider variety of effects available.
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69 X(1), xscreensaver(1), xscreensaver-getimage-file(6x), xscreen‐
70 saver-getimage-video(6x), xv(1), ppmtogif(1), cjpeg(1)
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73 Copyright © 1998-2001 by Jamie Zawinski. Permission to use, copy, mod‐
74 ify, distribute, and sell this software and its documentation for any
75 purpose is hereby granted without fee, provided that the above copy‐
76 right notice appear in all copies and that both that copyright notice
77 and this permission notice appear in supporting documentation. No rep‐
78 resentations are made about the suitability of this software for any
79 purpose. It is provided "as is" without express or implied warranty.
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82 Jamie Zawinski <jwz@jwz.org>, 18-Jan-98.
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86X Version 11 6.02-4.fc35 (09-Nov-2021) vidwhacker(6x)