jpeg2yuv man page on Mandriva

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jpeg2yuv(1)		      MJPEG tools manual		   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 descrip‐
	    tion 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)

MJPEG Linux Square		8 December 2001			   jpeg2yuv(1)
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