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)