Ppmtoyuvsplit User Manual(1)General Commands ManuaPpmtoyuvsplit User Manual(1) 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. OPTIONS There are no command line options defined specifically for ppmtoyuvs- plit, but it recognizes the options common to all programs based on libnetpbm (See Common Options ⟨index.html#commonoptions⟩ .) 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)
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