Software: Apache/2.2.3 (CentOS). PHP/5.1.6 uname -a: Linux mx-ll-110-164-51-230.static.3bb.co.th 2.6.18-194.el5PAE #1 SMP Fri Apr 2 15:37:44 uid=48(apache) gid=48(apache) groups=48(apache) Safe-mode: OFF (not secure) /usr/share/doc/netpbm-10.35.58/userguide/ drwxr-xr-x |
Viewing file: ppmtoyuvsplit.html (1.92 KB) -rw-r--r-- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) | ppmtoyuvsplitUpdated: 06 March 2003Table Of Contents NAMEppmtoyuvsplit - convert a PPM image to 3 subsampled raw YUV filesSYNOPSISppmtoyuvsplit basename [ppmfile]DESCRIPTIONThis program is part of Netpbm. 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 ALSOyuvsplittoppm, ppmtoyuv, ppmtoeyuv, ppmtompeg, ppmAUTHORCopyright (C) 1993 by Andre Beck. (Andre_Beck@IRS.Inf.TU-Dresden.de) Based on ppmtoyuv.c Table Of Contents |
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