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       lav2yuv - Convert a MJPEG file to raw yuv


       lav2yuv [options] lavfile1 [lavfile2 ... lavfileN]


       lav2yuv  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

       The -S -T -D options are used for scene  detection  which  is  used  by
       linux video studio.


       lav2yuv accepts the following options:

       -m   Force mono-chrome

       -c   Conceal  frames  containing  corrupt  MJPEG  data by repeating the
            preceeding 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
            negative all but the last num frames are skipped

       -f num
            Only num frames are written to stdout. 0 means that all frames are

       -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’
            (corresponding  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


       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:

       For more info, see our website at


       mjpegtools(1),  mpeg2enc(1),  yuvscaler(1),  yuv2lav(1), yuvdenoise(1),