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       jpeg2yuv - Convert jpeg images to the yuv format.


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


       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


       jpeg2yuv accepts the following options:

       -b num
            Frame offset:  skip output of the first ’num’  frames.   (default:

       -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
             $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)


       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.


       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:

       For more info, see our website at


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