1Ppmtoyuvsplit User Manual(0)                      Ppmtoyuvsplit User Manual(0)
2
3
4

NAME

6       ppmtoyuvsplit - convert a PPM image to 3 subsampled raw YUV files
7
8

SYNOPSIS

10       ppmtoyuvsplit basename [ppmfile]
11
12

DESCRIPTION

14       This program is part of Netpbm(1).
15
16       ppmtoyuvsplit  reads  a PPM image as input.  Produces 3 raw files base‐
17       name.Y, basename.U and basename.V as output.
18
19       The output files are the subsampled raw YUV representation of the input
20       PPM  image,  as required by the Stanford MPEG codec.  The Y output file
21       contains a byte for each pixel in the image, with the rows  going  from
22       top to bottom and the columns within each row going left to right.  The
23       U and V output files are arranged similarly, except that each byte rep‐
24       resents a square of 4 pixels of the image.  The value is the arithmetic
25       mean of the value for each of those 4 pixels.  Hence, the Y file  is  4
26       times the size of the U file or V file.
27
28       The YUV values are scaled according to CCIR.601, as assumed by MPEG.
29
30

OPTIONS

32       There  are  no command line options defined specifically for ppmtoyuvs‐
33       plit, but it recognizes the options common to  all  programs  based  on
34       libnetpbm (See
35        Common Options ⟨index.html#commonoptions⟩ .)
36
37

SEE ALSO

39       yuvsplittoppm(1), ppmtoyuv(1), ppmtoeyuv(1), ppmtompeg(1), ppm(1)
40
41

AUTHOR

43       Copyright (C) 1993 by Andre Beck. (Andre_Beck@IRS.Inf.TU-Dresden.de)
44
45       Based on ppmtoyuv.c
46

DOCUMENT SOURCE

48       This  manual  page was generated by the Netpbm tool 'makeman' from HTML
49       source.  The master documentation is at
50
51              http://netpbm.sourceforge.net/doc/ppmtoyuvsplit.html
52
53netpbm documentation             06 March 2003    Ppmtoyuvsplit User Manual(0)
Impressum