<s>
OpenWebRTC	B-Application
(	O
OWR	O
)	O
is	O
a	O
free	B-Application
software	I-Application
stack	O
that	O
implements	O
the	O
WebRTC	B-Protocol
standard	O
,	O
a	O
set	O
of	O
protocols	O
and	O
application	B-Application
programming	I-Application
interfaces	I-Application
defined	O
by	O
the	O
World	O
Wide	O
Web	O
Consortium	O
(	O
W3C	O
)	O
and	O
the	O
Internet	O
Engineering	O
Task	O
Force	O
(	O
IETF	O
)	O
.	O
</s>
<s>
It	O
is	O
an	O
alternative	O
to	O
the	O
reference	O
implementation	O
that	O
is	O
based	O
on	O
software	O
from	O
Global	B-Application
IP	I-Application
Solutions	I-Application
(	O
GIPS	O
)	O
.	O
</s>
<s>
It	O
is	O
published	O
under	O
the	O
terms	O
of	O
the	O
Simplified	O
(	O
2-clause	O
)	O
BSD	B-Operating_System
license	I-Operating_System
and	O
officially	O
supports	O
iOS	B-Application
,	O
Linux	B-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
and	O
Android	B-Application
operating	I-Application
systems	I-Application
.	O
</s>
<s>
to	O
power	O
native	O
mobile	B-Application
apps	I-Application
.	O
</s>
<s>
It	O
is	O
mostly	O
written	O
in	O
C	B-Language
and	O
based	O
largely	O
on	O
the	O
multimedia	O
framework	O
GStreamer	B-Language
and	O
a	O
number	O
of	O
other	O
,	O
smaller	O
external	O
libraries	B-Library
.	O
</s>
<s>
It	O
officially	O
supports	O
both	O
VP8	B-Algorithm
and	O
H.264	B-Application
as	O
video	O
formats	O
.	O
</s>
<s>
For	O
H.264	B-Application
it	O
uses	O
OpenH264	B-Language
to	O
which	O
Cisco	O
pays	O
the	O
patent	O
licensing	O
bills	O
.	O
</s>
<s>
Development	O
of	O
OpenWebRTC	B-Application
started	O
at	O
Ericsson	O
Research	O
under	O
the	O
lead	O
of	O
Stefan	O
Ålund	O
.	O
</s>
<s>
They	O
released	O
it	O
as	O
free	B-Application
software	I-Application
in	O
September	O
2014	O
,	O
together	O
with	O
the	O
proof-of-concept	O
web	O
browser	O
"	O
Bowser	O
"	O
that	O
is	O
based	O
on	O
the	O
stack	O
.	O
</s>
