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Ppmtoyuvsplit User Manual(0)					     Ppmtoyuvsplit User Manual(0)

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.

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

netpbm documentation			  06 March 2003 	     Ppmtoyuvsplit User Manual(0)
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