screencast.rst
author Oleksandr Gavenko <gavenkoa@gmail.com>
Sat, 23 Jul 2011 13:36:40 +0300
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VLC for screencast.
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.. -*- coding: utf-8 -*-
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============
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 Screncast.
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============
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.. contents::
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VLC.
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====
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::
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  $ cvlc screen:// --screen-mouse-image cursor.png --screen-fps=12 \
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    --screen-width=1680 --screen-height=1050 --no-sout-audio \
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    --sout "#transcode{venc=theora,quality:10,scale=0.75,fps=12}:duplicate{dst=std{access=file,mux=ogg,dst=desktop.ogg}}}"
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Available options:
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  screen-caching <integer>
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                Time in milliseconds.
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  screen-fps <integer>
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                Capture frames per second (0 default).
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  screen-top <integer>
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                The top edge coordinate of the subscreen.
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  screen-left <integer>
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                The left edge coordinate of the subscreen.
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  screen-width <integer>
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                The width of the subscreen.
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  screen-height <integer>
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                The height of the subscreen.
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  screen-mouse-image <filename>
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                Mouse pointer image to use.
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Wink.
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=====
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Using Wink you can capture screenshots, add explanations boxes, buttons,
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titles etc and generate a highly effective tutorial for your users.
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  http://www.debugmode.com/wink/
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                home page
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vnc2flv.
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========
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In order to rrecord require VNC server running on host.
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  http://www.unixuser.org/~euske/python/vnc2flv/index.html
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                home page
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ffmpeg.
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=======
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::
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  $ ffmpeg -f x11grab -s cif -i :0.0 capture.mpg
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Recordmydesktop.
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================
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Screenshort movies.
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===================
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ImageMagic and shell script.
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----------------------------
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::
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  #!/bin/bash
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  let iter=1
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  while [ "$iter" -le "$stop" ]; do
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    import $iter.png
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    sleep 1
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    let x+=1
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  done
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If you interesting in capturing specific window - by 'xwininfo' find,
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intereesting your window id (hex value) and use command::
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  import -window $windowid $iter.png
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To quick view result run::
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  $ cd $img_dir
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  $ animate -delay 20 *.png
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  ^C
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To compound image together::
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  $ convert -delay 20 *.png capture.mng  # license free, multi-image file format
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  $ convert -delay 20 *.png capture.gif
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You can add text to pictures before compound theirs::
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  $ mogrify -fill yellow -draw 'Rectangle 10,10 150,30' -fill black -pointsize 14 \
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     -draw 'text 15,25 "by http://example.com"' $iter.png
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If screen capturing slow for you use MIFF file format.
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Use root flag to capture all screen::
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  $ import -window root $iter.png
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  http://linuxdevcenter.com/pub/a/linux/2004/03/04/screen_capture_movies.html
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                Making Screen-Capture Movies by Robert Bernier
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