LZW compression CLI tool (was: screen capture)
LZW compression CLI tool (was: screen capture)
- Subject: LZW compression CLI tool (was: screen capture)
- From: brian mather <email@hidden>
- Date: Wed, 10 Dec 2003 00:26:42 -0500
From: "j.e.b." <email@hidden>
Michael
Thanks! Works great! I made 3 versions (just because) i.e. one for PNG,
JPG
and TIFF
I appreciate you taking the time to provide this information.
Jim
How would I save this PNG to the Desktop rather than the /tmp/
directory?
do shell script "screencapture -S ~/Desktop/screengrab.pdf ; sips -s
format
png ~/Desktop/screengrab.pdf --out ~/Desktop/screengrab.png"
BTW, you can also use the TIFF format doing it this way (as Bill Briggs
suggests), but the output file can be large (my test PDF 444 KB :
output
tiff 2.5 MB):
do shell script "screencapture -S ~/Desktop/screengrab.pdf ; sips -s
format
tiff ~/Desktop/screengrab.pdf --out ~/Desktop/screengrab.tif"
Perhaps, someone on the list can suggest a CLI or AS method for LZW
compressing that output tiff?
HTH
Michael Alatorre (mailto:email@hidden)
regarding the question of CLI tools to lzw compress. perhaps look at
www.imagemagick.org. or www.graphicsmagick.org s splinter from the
imagemagick project.
binaries as well as source code are available and if I am not mistaken
Unisys' US patent on lzw compression expired this past June so where
previously users could not enable the option in imagemagick when
building from source -- without securing Unisys' blessing -- they can
now freely do so. not sure about worldwide patents....
from the man page for 'convert'
NAME
convert - converts an input file using one image format to an
output
file with the same or differing image format.
SYNOPSIS
convert [ options ... ] file [ file... ] file
DESCRIPTION
convert converts an input file using one image format to an
output file
with the same or differing image format.
other than just changing formats imagemagick does about a jillion other
things .... docs are sketchy (IMO) but there's a pretty good list
community.
-brian
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