<s>
Natron	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
node-based	O
compositing	O
application	O
.	O
</s>
<s>
It	O
has	O
been	O
influenced	O
by	O
digital	O
compositing	O
software	O
such	O
as	O
Avid	B-Device
Media	I-Device
Illusion	I-Device
,	O
Apple	B-Application
Shake	I-Application
,	O
Blackmagic	B-Language
Fusion	I-Language
,	O
Autodesk	O
Flame	O
and	O
Nuke	B-Language
,	O
from	O
which	O
its	O
user	O
interface	O
and	O
many	O
of	O
its	O
concepts	O
are	O
derived	O
.	O
</s>
<s>
Natron	B-Language
supports	O
plugins	B-Application
following	O
the	O
OpenFX	B-Application
1.4	I-Application
API	I-Application
.	O
</s>
<s>
Most	O
open-source	O
and	O
commercial	O
OpenFX	B-Application
plug-ins	B-Application
are	O
supported	O
.	O
</s>
<s>
Natron	B-Language
is	O
named	O
after	O
Lake	O
Natron	B-Language
in	O
Tanzania	O
which	O
,	O
according	O
to	O
Natron	B-Language
lead	O
programmer	O
Alexandre	O
Gauthier	O
,	O
provides	O
"	O
natural	O
visual	O
effects	O
"	O
by	O
preserving	O
its	O
dead	O
animals	O
.	O
</s>
<s>
Natron	B-Language
was	O
started	O
by	O
Alexandre	O
Gauthier	O
in	O
June	O
of	O
2012	O
as	O
a	O
personal	O
project	O
.	O
</s>
<s>
The	O
prize	O
was	O
a	O
12-month	O
employment	O
contract	O
to	O
develop	O
Natron	B-Language
as	O
a	O
free	B-License
and	I-License
open-source	I-License
software	I-License
within	O
the	O
institute	O
.	O
</s>
<s>
Subsequent	O
beta	O
releases	O
brought	O
additional	O
features	O
such	O
as	O
motion	O
blur	O
,	O
color	O
management	O
through	O
,	O
and	O
video	B-Operating_System
tracking	I-Operating_System
.	O
</s>
<s>
Version	O
1.0	O
was	O
released	O
on	O
December	O
22nd	O
,	O
2014	O
,	O
together	O
with	O
a	O
large	O
sample	O
project	O
by	O
François	O
"	O
CoyHot	O
"	O
Grassard	O
,	O
a	O
professional	O
computer	O
graphics	O
artist	O
and	O
teacher	O
,	O
demonstrating	O
that	O
Natron	B-Language
could	O
execute	O
interactively	O
graphs	O
with	O
more	O
than	O
100	O
nodes	O
.	O
</s>
<s>
In	O
January	O
2015	O
,	O
the	O
Art	O
and	O
Technology	O
of	O
Image	O
(	O
ATI	O
)	O
department	O
in	O
Paris	O
8	O
University	O
announced	O
that	O
they	O
would	O
switch	O
to	O
professional-quality	O
free	B-License
and	I-License
open-source	I-License
software	I-License
for	O
teaching	O
computer	O
graphics	O
to	O
students	O
and	O
artists	O
,	O
including	O
Blender	B-Application
,	O
Krita	B-Application
and	O
Natron	B-Language
.	O
</s>
<s>
Before	O
version	O
2.0	O
,	O
Natron	B-Language
was	O
licensed	O
under	O
the	O
Mozilla	B-License
Public	I-License
License	I-License
version	O
2.0	O
,	O
which	O
allowed	O
redistributing	O
it	O
with	O
closed-source	B-Application
plug-ins	B-Application
.	O
</s>
<s>
Since	O
version	O
2.0	O
,	O
the	O
software	O
was	O
relicensed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
version	O
2	O
or	O
later	O
to	O
allow	O
better	O
commercialization	O
.	O
</s>
<s>
All	O
plugins	B-Application
that	O
are	O
distributed	O
with	O
binaries	O
of	O
Natron	B-Language
2.0	O
or	O
later	O
have	O
thus	O
to	O
be	O
compatible	O
with	O
the	O
GPLv2	O
.	O
</s>
<s>
Closed-source	B-Application
plug-ins	B-Application
,	O
including	O
commercial	O
ones	O
,	O
can	O
still	O
be	O
used	O
with	O
Natron	B-Language
,	O
although	O
the	O
GPL	B-License
according	O
to	O
the	O
FSF	B-Operating_System
does	O
not	O
allow	O
loading	B-Application
and	I-Application
linking	I-Application
closed-source	B-Application
plug-ins	B-Application
,	O
or	O
plug-ins	B-Application
that	O
are	O
not	O
distributed	O
under	O
a	O
GPL	B-License
compatible	O
license	O
,	O
but	O
they	O
have	O
to	O
be	O
distributed	O
separately	O
.	O
</s>
<s>
Data	O
produced	O
by	O
Natron	B-Language
,	O
or	O
any	O
software	O
distributed	O
under	O
the	O
GPL	B-License
,	O
is	O
not	O
covered	O
by	O
the	O
GPL	B-License
:	O
the	O
copyright	O
on	O
the	O
output	O
of	O
a	O
program	O
belongs	O
to	O
the	O
user	O
of	O
that	O
program	O
.	O
</s>
<s>
A	O
graphic	O
card	O
that	O
supports	O
OpenGL	B-Application
2.0	O
or	O
OpenGL	B-Application
1.5	O
with	O
a	O
few	O
commonly	O
available	O
extensions	O
(	O
,	O
,	O
,	O
)	O
.	O
</s>
<s>
32	O
bit	O
floating	O
point	O
linear	O
color	O
processing	O
pipeline	O
:	O
all	O
frames	O
are	O
represented	O
as	O
floating-point	O
RGBA	O
samples	O
with	O
premultiplied	B-Algorithm
alpha	I-Algorithm
,	O
permitting	O
the	O
use	O
of	O
alpha	B-Algorithm
compositing	I-Algorithm
operators	O
defined	O
by	O
Thomas	O
Porter	O
and	O
Tom	O
Duff	O
.	O
</s>
<s>
Support	O
for	O
multi-core	O
architectures	O
:	O
all	O
processing	O
is	O
multithreaded	B-Operating_System
using	O
a	O
thread	B-Operating_System
pool	I-Operating_System
pattern	I-Operating_System
.	O
</s>
<s>
Support	O
for	O
many	O
image	O
formats	O
,	O
using	O
OpenImageIO	B-Language
,	O
including	O
multi-layer	O
OpenEXR	B-Application
.	O
</s>
<s>
Support	O
for	O
reading	O
and	O
writing	O
video	O
files	O
through	O
the	O
FFmpeg	B-Library
library	O
,	O
including	O
digital	O
intermediate	O
formats	O
such	O
as	O
DNxHD	O
and	O
Apple	B-Algorithm
ProRes	I-Algorithm
.	O
</s>
<s>
Full	O
support	O
of	O
the	O
OpenFX	B-Application
1.4	I-Application
API	I-Application
,	O
enabling	O
use	O
of	O
open	O
source	O
or	O
commercial	O
plug-ins	B-Application
.	O
</s>
<s>
Video	B-Operating_System
tracking	I-Operating_System
functionalities	O
.	O
</s>
<s>
Key	O
frame-based	O
parameter	O
animation	O
,	O
using	O
Bernstein	B-Algorithm
polynomials	I-Algorithm
(	O
the	O
polynomial	O
basis	O
behind	O
Bézier	O
curves	O
)	O
for	O
interpolation	O
.	O
</s>
<s>
Support	O
for	O
stereoscopic	B-Algorithm
3D	I-Algorithm
and	O
multi-view	O
processing	O
.	O
</s>
<s>
Support	O
for	O
batch-mode	O
rendering	O
through	O
a	O
command-line	O
tool	O
,	O
allowing	O
the	O
final	O
render	O
to	O
be	O
processed	O
on	O
a	O
render	B-Operating_System
farm	I-Operating_System
.	O
</s>
<s>
A	O
project	O
format	O
written	O
in	O
XML	B-Protocol
and	O
easily	O
human	O
editable	O
.	O
</s>
<s>
Node	O
presets	O
can	O
be	O
imported/exported	O
easily	O
via	O
XML	B-Protocol
.	O
</s>
<s>
Python	B-Language
script	I-Language
language	O
(	O
Python	B-Language
2.7	O
)	O
.	O
</s>
<s>
WebGL	B-Library
1.0	O
script	O
language	O
(	O
Shadertoy	B-Language
)	O
for	O
hardware	O
accelerated	O
2D/3D	O
visual	O
effects	O
development	O
.	O
</s>
<s>
"	O
PyPlug	O
"	O
custom	O
node	O
creation	O
system	O
(	O
equivalent	O
to	O
Nuke	B-Language
Gizmos	O
)	O
.	O
</s>
