yuv2lav - encodes lavtool's raw YUV frame streams into MJPEG files


   yuv2lav  [-f a|A|q|m]  [-q num] [-b num] [-I num] [-m num] [-v num] [-w
   file] -o output-file


   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.


   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

   -f a|A|q
          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.   If  you
          don't  use that option yuv2lav will set the output format to AVI
          if the last 3 char are avi, or to Quicktime if you use  mov.  If
          you use the -f option it overides the setting in the filename

   -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%
          quality 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
          on the output file type.

   -I num Force  a  specific  interlacing  type. 0 means no interlacing, 1
          means top-field-first, 2 means bottom-field-first.

   -w file
          This is the WAV file containing audio data to be  combined  with
          the video stream into the output file.

   -v num Verbosity  level.  0  means  only print error messages, 2 prints
          full debug output.

   -?     Display a synopsis of the command syntax.


   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.


   If you experience any problems with this  tool,  please  feel  free  to
   contact the developers (see below).


   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:
   For more info, see our website at


   lav2yuv(1),    lavpipe(1),    lavplay(1),    lavrec(1),    mpeg2enc(1),

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