y4mtopnm(1) MJPEG tools manual y4mtopnm(1) (NAME) y4mtopnm - YUV4MPEG2 PNM (SYNOPSIS) y4mtopnm [options] (DESCRIPTION) y4mtopnm YUV4MPEG2 PPM PGM PAM . ( <> PPM PGM PBM . PAM .) stdout ( ). YUV4MPEG2 stdin . YUV4MPEG2 Y'CbCr ( ITU-R BT.601) . 4:4:4 () y4mtopnm R'G'B' PPM . <> ( luma) [0,255] PGM . YUV4MPEG2 (!) (subsampled) y4mtopnm ( <> ). y4mscaler 4:4:4 . y4mtopnm <<444ALPHA>> ( 4:4:4 ) <<-P>> . <<-P>> PAM TUPLTYPE RGB_ALPHA . <<-P>> PPM PGM : PPM PGM . ( PPM PGM pnmtoy4m . .) . / << >> pnmsplit . ( PNM / .) y4mtopnm pnmtoy4m (pipe) ( <<444ALPHA>> <> ). (lossy) ( / ). PNM (interlacing) (sample aspect ratio) ( pnmtoy4m ). (OPTIONS) y4mtopnm : -P PAM PPM / PGM. PAM PNM . ( NetPBM .) -D (field) . ( .) (interlaced) bottom-field-first . (progressive) << >> (mixed-mode) . <> PNM/PAM pnmtoy4m . -f <<>> (flattened) . / PGM ( PAM ) : +-----+ +-----+ 4:4:4 | Y | 4:4:4 w/alpha | Y | +-----+ +-----+ | Cb | | Cb | +-----+ +-----+ | Cr | | Cr | +-----+ +-----+ | A | +-----+ +-----+ 4:2:2, | Y | 4:2:0 +--+--+ +-----+--+--+ |Cb|Cr| 4:1:1 | Y |Cb|Cr| +--+--+ +-----+--+--+ +-----+ MONO | Y | +-----+ YUV4MPEG2 (upsampling) . / PGM . . -v [0,1,2] (verbosity). 0 = . 1 = . 2 = . (EXAMPLES) AVI ( MJPEG DV) PPM: lav2yuv -f 15 your-video.avi | y4mscaler -O chromass=444 | y4mtopnm | pnmsplit - "your-video-%d.ppm" (AUTHORS) Matt Marjanovic . MJPEG-tools : mjpeg-users@lists.sourceforge.net : http://mjpeg.sourceforge.net (SEE ALSO) pam(5), pgm(5), pnm(5), ppm(5), pnmtoy4m(1), mjpegtools(1), mpeg2enc(1), lav2yuv(1), pnmsplit(1), y4mscaler(1) MJPEG Tools Team 28 April 2004 y4mtopnm(1)