ppmtoyuvsplit man page on CentOS

ppmtoyuvsplit man page on CentOS

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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 base‐
       name.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 rep‐
       resents 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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