SYNOPSIS
yuv2lav [-f a|A|q|m] [-q num] [-b num] [-I num] [-m num] [-v num] -o
output-file
DESCRIPTION
yuv2lav is a simple MJPEG encoder for raw YUV frame streams as they are
emitted by lav2yuv(1) or lavpipe(1), for example. It reads its input
from stdin and is capable of writing AVI and Quicktime.
OPTIONS
The command line options allow to specify the output file name, JPEG
encoding quality and the amount of memory that will be allocated for
JPEG compressed data.
-o output-file
This (compulsorary) option sets the name of the file that
yuv2lav will write its output to. If the output file contains a
% (e.g. file%02d.avi), the output will be written to multiple
files in case this is necessary (file00.avi, file01.avi and so
on).
-f a|A|q|m
This sets the output file format, which has to be one of
a - for AVI file output,
A - for AVI with reversed fields,
q - for Quicktime output or
AVI with reversed field of course only makes sense if yuv2lav’s
feed is an interlaced video source and should only be needed if
you experience frame reversal problems in your output.
-q num This option specifies the JPEG encoding quality as passed
through to libjpeg. The default value is 80, num must lie within
24...100 inclusive (think of it as percentage values, although
with a lossy compression algorithm like JPEG, keeping 100% of
the original quality is of course not really possible).
-b num This option specifies the size of the buffer (in kBytes) that
yuv2lav allocates in order to store the compressed JPEG data in
it. The default value (256k) is perfectly enough for 100% qual‐
ity full sized PAL/NTSC, but if you want to compress Super-Mega-
HDTV or if you are low on memory, you can use this option to
suit your needs.
-m num This is the maximum size (in MB) per file. Normally this depends
EXAMPLES
lav2yuv movie.avi | yuv2lav -fq -q 30 lowbitrate.qt
would recompress movie.avi as a low bit rate Quicktime file.
lavpipe input.pli | yuv2lav -q80 output.avi
would save the movie assembled by lavpipe as a single AVI file.
BUGS
If you experience any problems with this tool, please feel free to con‐
tact the developers (see below).
AUTHOR
This man page was written by pHilipp Zabel.
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
lav2yuv(1), lavpipe(1), lavplay(1), lavrec(1), mpeg2enc(1), yuvs‐
caler(1)
MJPEG Linux Square 2 June 2001 yuv2lav(1)
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