Pamsplit User Manual(1) General Commands Manual Pamsplit User Manual(1)
NAME
pamsplit - split a multi-image Netpbm file into single-image files
SYNOPSIS
pamsplit
[netpbmfile
[ output_file_pattern]]
[-padname=n]
Minimum unique abbreviation of option is acceptable. You may use double
hyphens instead of single hyphen to denote options. You may use white
space in place of the equals sign to separate an option name from its
value.
DESCRIPTION
This program is part of Netpbm(1).
pamsplit reads a PNM or PAM stream as input. It copies each image in
the input into a separate file, in the same format.
netpbmfile is the file name of the input file, or - to indicate Standard
Input. The default is Standard Input.
output_file_pattern tells how to name the output files. It is the file
name of the output file, except that the first occurrence of "%d" in it
is replaced by the image sequence number in unpadded ASCII decimal, with
the sequence starting at 0. If there is no "%d" in the pattern, pam-
split fails.
The default output file pattern is "image%d".
The -padname option specifies how many characters you want the image se-
quence number in the output file name padded with zeroes. pamsplit adds
leading zeroes to the image sequence number to get up to at least that
number of characters. This is just the number of characters in the se-
quence number part of the name. For example, pamsplit - output-
file%d.ppm -padname=3 would yield output filenames outputfile000.ppm,
outputfile001.ppm, etc.
Note that to do the reverse operation (combining multiple single-image
Netpbm files into a multi-image one), there is no special Netpbm pro-
gram. Just use cat.
If you just want to find out basic information about the images in a
stream, you can use pamfile on the stream.
To extract images from a stream and generate a single stream containing
them, use pampick.
To run a program on each image in a stream without the hassle of tempo-
rary files, use pamexec.
OPTIONS
In addition to the options common to all programs based on libnetpbm
(most notably -quiet, see ]8;;index.html#commonoptions\ Common Options]8;;\ ), pamsplit recognizes the
following command line option:
-padname=n
Specify the width (i.e. number of digits) of the image sequence
number field in the filenames of the output files. The image se-
quence will be padded with leading zeroes to achieve the stated
width.
The default is no padding (equivalent to -padname=0).
The -padname option was new in Netpbm 10.23 (July 2004). Before
that, there was never any padding.
SEE ALSO
pamfile(1), pampick(1), pamexec(1), pnm(1), pam(1), cat man page
DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML
source. The master documentation is at
http://netpbm.sourceforge.net/doc/pamsplit.html
netpbm documentation 11 August 2011 Pamsplit User Manual(1)
Generated by dwww version 1.16 on Tue Dec 16 04:51:15 CET 2025.