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jpeg2yuv(1)


NAME

   jpeg2yuv - Convert jpeg images to the yuv format.

SYNOPSIS

   jpeg2yuv  [-b  num]  [-f num] [-I num] [-A ratio] [-L num] [-n num] [-l
   num] [-j filename]

DESCRIPTION

   jpeg2yuv decompresses a sequence of JPEG files and pipes the image data
   to  stdout as a YUV4MPEG2 stream.  Any JPEG format supported by libjpeg
   can be read.  stdout will be  filled  with  the  YUV4MPEG2  movie  data
   stream,  so be prepared to pipe it on to mpeg2enc or to write it into a
   file.

OPTIONS

   jpeg2yuv accepts the following options:

   -b num
        Frame offset:  skip output of the first 'num'  frames.   (default:
        0)

   -f num
        Set  the  frame  rate  of  stream  accepts  the  same numbers.  No
        default, this option has to be specified.

   -A ratio
        Sample aspect ratio.  Default is square pixels (1:1)

   -I num
        interlacing mode: p = none / progressive
        t = top field first
        b = bottom field first
        No default, this option has to be specified.

   -L num
        0 = non-interlaced (two successive fields per JPEG file)
        1 = interlaced fields

   -l num
        Specifies the number of loops (default: 0 loops )
        When this option is not used the given range  of  images  is  only
        processed  once.  If  you  use this option with num of -1 jpeg2yuv
        will loop forever writing the image to stdout. When you use n >  0
        it will loop n-times till it finishes.

   -n num
        Specifies the number of frames to process. (default: all = -1)

   -j {1}%{2}d{3}
        Read JPEG frames with the name components as follows:
         {1} JPEG filename prefix (e g: picture_ )
         {2} Counting placeholder (like in C, printf, eg 06 ))
         {3}   File   extension.  Something  like  this:  .jpg  A  correct
        description of the files could look like this: picture_%06d.jpg

        If this option is omited, the filenames are read from  stdin.  For
        example:
         $ls *jpg | jpeg2yuv -f 25 -I p > result.yuv

   -R 1 or 0
        rescale YUV color values from 0-255 to 16-235 (default: 1)

   -v num
        Verbosity level (0, 1 or 2)

BUGS

   The frame rate description seems not to be up to date. The NTSC integer
   ratios seem not to be supported. As a workaround specify a PAL (25)  or
   FILM (24) and set the right frame rate in mpeg2enc with the -F option.

AUTHOR

   This man page was written by Bernhard Praschinger.
   If  you  have  questions, remarks, problems or you just want to contact
   the developers, the main mailing list for the MJPEG-tools is:
     mjpeg-users@lists.sourceforge.net

   For more info, see our website at
          http://mjpeg.sourceforge.net

SEE ALSO

   mjpegtools(1),  mpeg2enc(1),  ppmtoy4m(1),  yuv2lav(1),  yuvdenoise(1),
   yuvmedianfilter(1), yuvscaler(1)



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