jpeg2yuv(1)
NAME
jpeg2yuv - Convert jpeg images to the yuv format.
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}
- 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 cor
- rect description of the files could look like this:
picture_%06d.jpg - -v num
- Verbosity level (0, 1 or 2)
BUGS
The frame rate desciption seems not to be up to date. The
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