jpeg2yuv
Convert jpeg images to the yuv format.
see also :
mpeg2enc - ppmtoy4m - yuv2lav - yuvdenoise - yuvmedianfilter - yuvscaler
Synopsis
jpeg2yuv
[-b num] [-f num]
[-I num] [-A ratio]
[-L num] [-n num]
[-l num] [-j
filename]
add an example, a script, a trick and tips
examples
source
echo $((1+($RANDOM % NIMAGES))) $((5+($RANDOM %10)))
done
}
gen_movie_from_list() {
./jpeg2yuv -v 0 -I p -f $FPS
| yuv2lav -o movie.avi
source
LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARYPATH
export LD_LIBRARY_PATH
jpeg2yuv -f 25 -I p -b 1 -j %05d.jpeg | mpeg2enc -f 13 -F 3 -b 10000 -o ${mpegname}
exit 0
source
"ep${fn}.jpg"
done
}
gen_movie() {
outfile="$1"
jpeg2yuv -v 0 -I p -f 20 -j "ep${format}.jpg"| yuv2lav -f
a -b 10000 -o "$outfile"
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.
see also
mjpegtools,
mpeg2enc , ppmtoy4m , yuv2lav ,
yuvdenoise , yuvmedianfilter ,
yuvscaler
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[:at:]lists.sourceforge[:dot:]net
For more info, see our website at
http://mjpeg.sourceforge.net