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jpeg2yuv




SYNOPSIS

       jpeg2yuv  [-b num] [-f num] [-I num] [-L num] [-n 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 pre­
       pared to pipe it on to mpeg2enc or  to  write  it  into  a
       file.

       This is not the utility you are looking for.  This program
       is primarily a  diagnostic  utility  for  debugging  MJPEG
       recordings,  not  for making movies from standard graphics
       JPEG images.  It does not make any attempt to convert  the
       full-range  pixel  data  from  standard  JPEG's  into  the
       padded-range pixel data used in digital video.  The  util­
       ity  you are probably looking for is ppmtoy4m(1), which is
       also included in MJPEGtools.


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 num­
            bers. Not default, this option has to be specified.

       -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-interleaved (two successive fields  per  JPEG
            file)
            1 = interleaved fields

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

       -j {1}%{2}d{3}
       NTSC  integer  ratios  seems  not  to be suportet well. As
       workaround specify a PAL (25) or nativ 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)

MJPEG Linux Square       8 December 2001              jpeg2yuv(1)

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