FreeJ - vision mixer
freej [ options ] [ streaming options ] [ layer files and video devices
FreeJ is a vision mixer: an instrument for realtime video manipulation
used in the fields of dance teather, veejaying, medical visualisation
With FreeJ multiple layers can be filtered thru effect chains and then
mixed together. The supported layer inputs are images, movies, live
cameras, particle generators, text scrollers and more. All the
resulting video mix can be shown on multiple and remote screens,
encoded into a movie and streamed live to the internet.
FreeJ can be controlled locally or remotely, also from multiple places
at the same time, using its slick console interface; can be automated
-h show commandline help
-v show version information
-D [ num ]
set debug verbosity level to (1 to 3), default is 1
-s [ WxH ]
set resolution to WidthxHeight, default is 400x300
-n start with all layers deactivated
-c start without any interactive text console interface
-e [ file.ogg ]
set the filename of the local encoded ogg-theora movie (default
is: freej.ogg), files already existing are not overwritten,
instead filename-2.ogg is used; if a number is given, the
corresponding file descriptor is used. To start/stop the
recording and streaming use ctrl-w while running.
FILES AND DEVICES
FreeJ can run with an infinite number of layers, as much as your CPU
can handle. Layer types are recognized from file extensions.
Supported layers types include:
depends from freetype library http://freetype.org
cameras thru the Video4Linux device (/dev/v4l/*)
images (*.png|*.jpg and more)
flash animations (*.swf)
only the vectorial animation is supported (flash v.3), no
scripting nor streaming, but that’s in FreeJ anyway ;)
can be crated from commandline as layer_gen (or ctrl-g while
running) to create a layer that doesn’t needs any input, just
draws nice particles
any file type
if not recognized will be threated as a text scrolling layer
showing its contents scrolling them vertically on the screen
Scripting examples are available in the documentation, usually found
locally in /usr/share/doc/freej and online on
For example this freej script will start a stream right away:
// create a video encoder object - values [1-100]
// video qlty video bit audio qlty audio bit
new VideoEncoder( 10, 64000, 5, 24000);
encoder.stream_title("testing new freej");
but be sure to actually play something in it: open a camera or movie
Don’t stop reading documentation, this manual is not the only source
Denis "Jaromil" Rojo - author and mantainer
Silvano "Kysucix" Galliani - truetype text layer
A full list of developers and contributors can be found in the AUTHOR
file distributed with the source package.
FreeJ development is supported by the Nederlands Instituut voor
Mediakunst - Montevideo/Time Based Arts.
This manual page was written and is mantained by Jaromil.
Write to the mailinglist on <http://lists.dyne.org/freej> to
Permission is granted to copy, distribute and/or modify this manual
under the terms of the GNU Free Documentation License, Version 1.1 or
any later version published by the Free Software Foundation; with no
Invariant Sections. Permission is granted to make and distribute
verbatim copies of this manual page provided the above copyright notice
and this permission notice are preserved on all copies.
The most recent version of FreeJ can be attained from its homepage at
http://freej.dyne.org and from the ftp.dyne.org software repository.