Copyright (C) 2000-2012 |
Manpages giftopnmSection: User Commands (1)Updated: 13 January 2001 Index Return to Main Contents NAMEgiftopnm - convert a GIF file into a portable anymapSYNOPSISgiftopnm [--alphaout={alpha-filename,-}] [-verbose] [-comments] [-image N] [GIFfile]DESCRIPTIONReads a GIF file for input, and outputs portable anymap.If you have an animated GIF file, you can extract individual frames from it with gifsicle and then convert those using giftopnm. A GIF image contains rectangular pixels. They all have the same aspect ratio, but may not be square (it's actually quite unusual for them not to be square, but it could happen). The pixels of a Netpbm image are always square. Because of the computational complexity to do otherwise, giftopnm converts a GIF image to a Netpbm image pixel-for-pixel. This means if the GIF pixels are not square, the Netpbm output image has the wrong aspect ratio. In this case, giftopnm issues an informational message telling you to run pnmscale to correct the output. OPTIONS
All flags can be abbreviated to their shortest unique prefix. BUGSThis does not correctly handle the Plain Text Extension of the GIF89 standard, since I did not have any example input files containing them.SEE ALSOppmtogif(1), ppmcolormask(1), pnmcomp(1), gifsicle(1) <http://www.lcdf.org/gifsicle>, ppm(5).AUTHORCopyright (c) 1993 by David Koblas (koblas@netcom.com)LICENSEIf you use giftopnm, you are using a patent on the LZW compression method which is owned by Unisys, and in all probability you do not have a license from Unisys to do so. Unisys typically asks $5000 for a license for trivial use of the patent. Unisys has never enforced the patent against trivial users. The patent expires in 2003.Rumor has it that IBM also owns a patent covering giftopnm. A replacement for the GIF format that does not require any patents to use is the PNG format.
IndexThis document was created by man2html, using the manual pages. Time: 15:54:07 GMT, March 28, 2024 |