Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

lav2yuv(1)


NAME

   lav2yuv - Convert a MJPEG file to raw yuv

SYNOPSIS

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

DESCRIPTION

   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
   possible.

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

OPTIONS

   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
        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'
        (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
        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 ALSO

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



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner