lav2yuv(1) MJPEG tools manual lav2yuv(1)NAMElav2yuv - Convert a MJPEG file to raw yuv
SYNOPSISlav2yuv [options] lavfile1 [lavfile2 ... lavfileN]
DESCRIPTIONlav2yuv converts an MJPEG video sequence described by a sequence of
MJPEG video files and/or edit lists pointing to such files into the
simple uncompressed planar 4:2:0 Y'CbCr format, as used by mpeg2enc(1)
MPEG encoder and image processing filters like yuvscaler(1) or
yuv2dfilter(1) or yuvdenoise(1).
Output is to stdout so that by piping the output of lav2yuv into a
suitable pipeline it is possible to process and then encode or play
back video recorded in any of the mjpegtools MJPEG container formats:
AVI, quicktime or edit lists describing editted versions of video held
in such files.
Mixing different files with different video formats is currently not
possible.
The -S -T -D options are used for scene detection which is used by
linux video studio.
OPTIONSlav2yuv accepts the following options:
-m Force mono-chrome
-c Conceal frames containing corrupt MJPEG data by repeating the pre‐
ceeding good frame.
-S list.el
Output a scene list with scene detection
-T num
Set scene detection threshold to num (default: 4)
-D num
Width decimation to use for scene detection (default: 2)
-o num
Frame offset - skip num frames at the beginning. if num is nega‐
tive all but the last num frames are skipped
-f num
Only num frames are written to stdout. 0 means that all frames are
processed.
-A width:height
Set/override the sample aspect ratio (SAR) emitted in the output
stream header. Currently, the SAR is only auto-detected for DV
files, and guessed otherwise.
-P width:height
Set the intended/approximate display aspect ratio (DAR) for the
stream. This value is only used to guess the SAR when it cannot
be detected from the input stream. The default DAR is '4:3' (cor‐
responding to a standard TV screen); another useful value is
'16:9' (corresponding to widescreen TV).
-C chroma
Set output chroma (default: '420jpeg'). Currently, '420jpeg',
'420mpeg2', '420paldv', '422' are available.
-x Exchange fields. Useful if the field order was reversed during
editing.
AUTHOR
This man page was originally 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 ALSOmjpegtools(1), mpeg2enc(1), yuvscaler(1), yuv2lav(1), yuvdenoise(1),
yuvplay(1)MJPEG Linux Square 6 March 2002 lav2yuv(1)
