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Written by Oleksandr Gavenko (AKA gavenkoa), compiled at 2015-10-05
from rev 764bb173578d
.
Screncast.¶
Contents
VLC.¶
$ cvlc screen:// --screen-mouse-image cursor.png --screen-fps=12 \
--screen-width=1680 --screen-height=1050 --no-sout-audio --sout \
"#transcode{venc=theora,quality:10,scale=0.75,fps=12}:duplicate{dst=std{access=file,mux=ogg,dst=desktop.ogg}}}"
$ cvlc screen:// --screen-fps=12 --screen-mouse-image=e:/home/.icon/cursor.png --no-sout-audio --sout \
"#transcode{venc=x264,quality:100,scale=1,fps=12}:duplicate{dst=std{access=file,mux=mp4,dst=desktop.ogg}}}"
Available options:
- screen-caching <integer>
- Time in milliseconds.
- screen-fps <integer>
- Capture frames per second (0 default).
- screen-top <integer>
- The top edge coordinate of the subscreen.
- screen-left <integer>
- The left edge coordinate of the subscreen.
- screen-width <integer>
- The width of the subscreen.
- screen-height <integer>
- The height of the subscreen.
- screen-mouse-image <filename>
- Mouse pointer image to use.
libav.¶
$ sudo apt-get install libav-tools
$ avconv -f x11grab -s cif -r 25 -i :0.0 /tmp/out.mpg
$ avconv -f x11grab -s cif -r 25 -i :0.0+10,20 /tmp/out.mpg
ffmpeg.¶
Only video:
$ ffmpeg -f x11grab -r 25 -s cif -i :0.0 out.mpg
$ ffmpeg -f x11grab -r 25 -s 1024x768 -i :0.0 out.mpg
Video with audio:
$ ffmpeg -f oss -i /dev/audio -f x11grab -s cif -r 3 -ab 11 -i :0.0 out.mp4
Oprsions description:
-r
frames per second-s
resolution
recordMyDesktop.¶
$ recordmydesktop --no-sound --windowid $(xwininfo | awk '/Window id:/ {print $4}')
Screenshort movies.¶
Screenshort movie by mencoder.¶
$ mencoder "mf://*.jpg" -mf fps=30 -o output.avi
Screenshort movie by ffmpeg.¶
mplayer -ao null -ss 0:0:33 -endpos 2 eagles.avi -vo jpeg:outdir=~/dir
mplayer -ao null -ss 0:0:33 -endpos 2 eagles.avi -vo png:z=9:outdir=~/dir
Here:
-ss
tells mplayer where you begin-endpos
tells mplayer where to stop (minutes)z=9
sets compression level
ImageMagic and shell script.¶
#!/bin/bash
let iter=1
while [ "$iter" -le "$stop" ]; do
import $iter.png
sleep 1
let x+=1
done
If you interesting in capturing specific window - by ‘xwininfo’ find, intereesting your window id (hex value) and use command:
import -window $windowid $iter.png
To quick view result run:
$ cd $img_dir
$ animate -delay 20 *.png
^C
To compound image together:
$ convert -delay 20 *.png capture.mng # license free, multi-image file format
$ convert -delay 20 *.png capture.gif
You can add text to pictures before compound theirs:
$ mogrify -fill yellow -draw 'Rectangle 10,10 150,30' -fill black -pointsize 14 \
-draw 'text 15,25 "by http://example.com"' $iter.png
If screen capturing slow for you use MIFF file format.
Use root flag to capture all screen:
$ import -window root $iter.png
http://linuxdevcenter.com/pub/a/linux/2004/03/04/screen_capture_movies.html
Making Screen-Capture Movies by Robert Bernier