<s>
OBS	B-Language
Studio	I-Language
(	O
also	O
Open	B-Language
Broadcaster	I-Language
Software	I-Language
or	O
OBS	O
,	O
for	O
short	O
)	O
is	O
a	O
free	B-License
,	I-License
open-source	I-License
,	O
and	O
cross-platform	B-Operating_System
screencasting	B-General_Concept
and	I-General_Concept
streaming	I-General_Concept
app	I-General_Concept
.	O
</s>
<s>
It	O
is	O
available	O
for	O
Windows	O
,	O
macOS	B-Application
,	O
Linux	B-Application
distributions	I-Application
,	O
and	O
BSD	B-Operating_System
.	O
</s>
<s>
OBS	B-Language
Studio	I-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
app	O
for	O
screencasting	B-Protocol
and	O
live	O
streaming	O
.	O
</s>
<s>
Written	O
in	O
C/C	O
++	O
and	O
built	O
with	O
Qt	B-Language
,	O
OBS	B-Language
Studio	I-Language
provides	O
real-time	O
capture	O
,	O
scene	O
composition	O
,	O
recording	O
,	O
encoding	O
,	O
and	O
broadcasting	O
via	O
Real	B-Operating_System
Time	I-Operating_System
Messaging	I-Operating_System
Protocol	I-Operating_System
(	O
RTMP	O
)	O
,	O
HLS	O
,	O
SRT	O
or	O
RIST	O
.	O
</s>
<s>
It	O
can	O
stream	O
videos	O
to	O
any	O
RTMP-supporting	O
destination	O
,	O
including	O
YouTube	B-General_Concept
,	O
Twitch	O
,	O
Instagram	B-Application
and	O
Facebook	B-Application
.	I-Application
</s>
<s>
For	O
video	O
encoding	O
,	O
OBS	B-Language
Studio	I-Language
can	O
use	O
the	O
x264	B-Language
transcoder	O
,	O
Intel	B-Algorithm
Quick	I-Algorithm
Sync	I-Algorithm
Video	I-Algorithm
,	O
Nvidia	B-General_Concept
NVENC	I-General_Concept
and	O
the	O
AMD	O
Video	O
Coding	O
Engine	O
to	O
encode	O
video	O
streams	O
into	O
the	O
H.264/MPEG	B-Application
-4	I-Application
AVC	I-Application
or	O
H.265/HEVC	B-Algorithm
formats	O
.	O
</s>
<s>
It	O
can	O
encode	O
multiple	O
tracks	O
of	O
audio	O
in	O
the	O
AAC	B-Application
format	I-Application
.	O
</s>
<s>
More	O
experienced	O
users	O
can	O
choose	O
any	O
codecs	O
and	O
containers	O
available	O
in	O
libavcodec	B-Language
and	O
libavformat	B-Library
,	O
or	O
output	O
the	O
stream	O
to	O
a	O
custom	O
FFmpeg	B-Library
URL	O
.	O
</s>
<s>
OBS	B-Language
Studio	I-Language
also	O
supports	O
plug-ins	O
to	O
extend	O
its	O
functionality	O
.	O
</s>
<s>
OBS	B-Language
Studio	I-Language
started	O
out	O
as	O
a	O
small	O
project	O
created	O
by	O
Hugh	O
"	O
Jim	O
"	O
Bailey	O
,	O
but	O
quickly	O
grew	O
with	O
the	O
help	O
of	O
many	O
online	O
collaborators	O
working	O
both	O
to	O
improve	O
OBS	O
and	O
to	O
share	O
knowledge	O
about	O
the	O
program	O
.	O
</s>
<s>
In	O
2013	O
,	O
development	O
started	O
on	O
a	O
rewritten	O
version	O
known	O
as	O
OBS	O
Multiplatform	B-Operating_System
(	O
later	O
renamed	O
OBS	B-Language
Studio	I-Language
)	O
for	O
multi-platform	B-Operating_System
support	O
,	O
a	O
more	O
thorough	O
feature	O
set	O
,	O
and	O
a	O
more	O
powerful	O
API	O
.	O
</s>
<s>
In	O
2016	O
,	O
OBS	O
"	O
Classic	O
"	O
lost	O
support	O
and	O
OBS	B-Language
Studio	I-Language
became	O
the	O
primary	O
version	O
.	O
</s>
<s>
On	O
16	O
December	O
2021	O
,	O
an	O
OBS	B-Language
Studio	I-Language
developer	O
drew	O
attention	O
to	O
an	O
invitation-only	O
release	O
of	O
TikTok	B-Application
Live	O
Studio	O
,	O
which	O
appeared	O
to	O
be	O
based	O
on	O
OBS	B-Language
Studio	I-Language
,	O
without	O
acknowledgement	O
and	O
in	O
violation	O
of	O
OBS	B-Language
Studio	I-Language
's	O
license	O
.	O
</s>
