NAME

       ppmtoyuvsplit - convert a PPM image to 3 subsampled raw YUV files

SYNOPSIS

       ppmtoyuvsplit basename [ppmfile]

DESCRIPTION

       This program is part of Netpbm(1).

       ppmtoyuvsplit  reads a PPM image as input.  Produces 3 raw files basename.Y, basename.U and basename.V as
       output.

       The output files are the subsampled raw YUV representation of the input PPM image,  as  required  by  the
       Stanford  MPEG codec.  The Y output file contains a byte for each pixel in the image, with the rows going
       from top to bottom and the columns within each row going left to right.  The U and  V  output  files  are
       arranged similarly, except that each byte represents a square of 4 pixels of the image.  The value is the
       arithmetic  mean of the value for each of those 4 pixels.  Hence, the Y file is 4 times the size of the U
       file or V file.

       The YUV values are scaled according to CCIR.601, as assumed by MPEG.

OPTIONS

       There are no command line options defined specifically for ppmtoyuvsplit, but it recognizes  the  options
       common to all programs based on libnetpbm (See  Common Options .)

SEE ALSO

       yuvsplittoppm(1), ppmtoyuv(1), ppmtoeyuv(1), ppmtompeg(1), ppm(1)

AUTHOR

       Copyright (C) 1993 by Andre Beck. (Andre_Beck@IRS.Inf.TU-Dresden.de)

       Based on ppmtoyuv.c

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/ppmtoyuvsplit.html

netpbm documentation                              06 March 2003                     Ppmtoyuvsplit User Manual(1)