<s>
GStreamer	B-Language
is	O
a	O
pipeline-based	O
multimedia	B-Library
framework	I-Library
that	O
links	O
together	O
a	O
wide	O
variety	O
of	O
media	O
processing	O
systems	O
to	O
complete	O
complex	O
workflows	O
.	O
</s>
<s>
For	O
instance	O
,	O
GStreamer	B-Language
can	O
be	O
used	O
to	O
build	O
a	O
system	O
that	O
reads	O
files	O
in	O
one	O
format	O
,	O
processes	O
them	O
,	O
and	O
exports	O
them	O
in	O
another	O
.	O
</s>
<s>
GStreamer	B-Language
supports	O
a	O
wide	O
variety	O
of	O
media-handling	O
components	O
,	O
including	O
simple	O
audio	O
playback	O
,	O
audio	O
and	O
video	O
playback	O
,	O
recording	O
,	O
streaming	O
and	O
editing	O
.	O
</s>
<s>
The	O
pipeline	B-Operating_System
design	O
serves	O
as	O
a	O
base	O
to	O
create	O
many	O
types	O
of	O
multimedia	O
applications	O
such	O
as	O
video	O
editors	O
,	O
transcoders	B-Algorithm
,	O
streaming	O
media	O
broadcasters	O
and	O
media	O
players	O
.	O
</s>
<s>
the	O
BSDs	B-Operating_System
,	O
OpenSolaris	B-Operating_System
,	O
Android	B-Application
,	O
macOS	B-Application
,	O
iOS	B-Application
,	O
Windows	B-Application
,	O
OS/400	B-Application
.	O
</s>
<s>
GStreamer	B-Language
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
subject	O
to	O
the	O
terms	O
of	O
the	O
LGPL-2.1-or-later	B-Application
and	O
is	O
being	O
hosted	O
at	O
freedesktop.org	B-Application
.	O
</s>
<s>
The	O
GNOME	B-Application
desktop	I-Application
environment	I-Application
,	O
a	O
heavy	O
user	O
of	O
GStreamer	B-Language
,	O
has	O
included	O
GStreamer	B-Language
since	O
GNOME	B-Application
version	O
2.2	O
and	O
encourages	O
GNOME	B-Application
and	O
GTK	B-Application
applications	O
to	O
use	O
it	O
.	O
</s>
<s>
Other	O
projects	O
also	O
use	O
or	O
support	O
it	O
,	O
such	O
as	O
the	O
Phonon	B-Language
media	B-Library
framework	I-Library
and	O
the	O
Songbird	B-Application
media	O
player	O
.	O
</s>
<s>
It	O
is	O
also	O
used	O
in	O
the	O
Webkit	B-Language
browser	O
engine	O
.	O
</s>
<s>
GStreamer	B-Language
also	O
operates	O
in	O
embedded	O
devices	O
like	O
the	O
Jolla	B-Operating_System
Phone	I-Operating_System
,	O
the	O
Palm	B-Application
Pre	I-Application
,	O
Tizen	B-Application
and	O
the	O
Nokia	B-Application
770	I-Application
,	O
N800	B-Application
,	O
N810	B-Language
,	O
N900	B-Application
and	O
N9	B-Operating_System
Internet	O
Tablets	O
running	O
the	O
Maemo	B-Operating_System
operating	O
system	O
.	O
</s>
<s>
In	O
addition	O
to	O
source	O
code	O
releases	O
,	O
the	O
GStreamer	B-Language
project	O
provides	O
binary	O
builds	O
for	O
Android	B-Application
,	O
iOS	B-Application
,	O
OSX	O
and	O
Windows	B-Application
.	O
</s>
<s>
The	O
LIGO	O
Laboratory	O
make	O
use	O
of	O
GStreamer	B-Language
to	O
simulate	O
and	O
analyze	O
gravitational	O
wave	O
data	O
.	O
</s>
<s>
The	O
GStreamer	B-Language
interface	O
is	O
called	O
GstLAL	O
.	O
</s>
<s>
GStreamer	B-Language
is	O
written	O
in	O
the	O
C	B-Language
programming	I-Language
language	I-Language
with	O
the	O
type	O
system	O
based	O
on	O
GObject	B-Language
and	O
the	O
GLib	O
2.0	O
object	O
model	O
.	O
</s>
<s>
A	O
library	O
written	O
in	O
one	O
programming	O
language	O
may	O
be	O
used	O
in	O
another	O
language	O
if	O
bindings	B-Application
are	O
written	O
;	O
GStreamer	B-Language
has	O
a	O
range	O
of	O
bindings	B-Application
for	O
various	O
languages	O
such	O
as	O
Go	B-Application
,	O
Python	B-Language
,	O
Rust	B-Application
,	O
Vala	B-Language
,	O
C++	B-Language
,	O
Perl	B-Language
,	O
GNU	B-Application
Guile	I-Application
,	O
C#	B-Application
and	O
Ruby	B-Language
.	O
</s>
<s>
GStreamer	B-Language
processes	O
media	O
by	O
connecting	O
a	O
number	O
of	O
processing	O
elements	O
into	O
a	O
pipeline	B-Operating_System
.	O
</s>
<s>
Each	O
element	O
is	O
provided	O
by	O
a	O
plug-in	B-Application
.	O
</s>
<s>
This	O
is	O
an	O
example	O
of	O
a	O
filter	B-Library
graph	I-Library
.	O
</s>
<s>
When	O
the	O
pipeline	B-Operating_System
is	O
in	O
the	O
playing	O
state	O
,	O
data	O
buffers	O
flow	O
from	O
the	O
source	O
pad	O
to	O
the	O
sink	O
pad	O
.	O
</s>
<s>
The	O
diagram	O
to	O
the	O
right	O
could	O
exemplify	O
playing	O
an	O
MP3	B-Application
file	I-Application
using	O
GStreamer	B-Language
.	O
</s>
<s>
The	O
file	O
source	O
reads	O
an	O
MP3	B-Application
file	I-Application
from	O
a	O
computer	O
's	O
hard-drive	O
and	O
sends	O
it	O
to	O
the	O
MP3	B-Application
decoder	O
.	O
</s>
<s>
The	O
decoder	O
decodes	O
the	O
file	O
data	O
and	O
converts	O
it	O
into	O
PCM	B-Algorithm
samples	O
which	O
then	O
pass	O
to	O
the	O
sound-driver	O
.	O
</s>
<s>
The	O
sound-driver	O
sends	O
the	O
PCM	B-Algorithm
sound	O
samples	O
to	O
the	O
computer	O
's	O
speakers	O
.	O
</s>
<s>
GStreamer	B-Language
uses	O
a	O
plug-in	B-Application
architecture	O
which	O
makes	O
the	O
most	O
of	O
GStreamer	B-Language
's	O
functionality	O
implemented	O
as	O
shared	B-Library
libraries	I-Library
.	O
</s>
<s>
GStreamer	B-Language
's	O
base	O
functionality	O
contains	O
functions	O
for	O
registering	O
and	O
loading	O
plug-ins	B-Application
and	O
for	O
providing	O
the	O
fundamentals	O
of	O
all	O
classes	O
in	O
the	O
form	O
of	O
base	O
classes	O
.	O
</s>
<s>
Plug-in	B-Application
libraries	O
get	O
dynamically	O
loaded	O
to	O
support	O
a	O
wide	O
spectrum	O
of	O
codecs	B-General_Concept
,	O
container	O
formats	O
,	O
input/output	B-Application
drivers	I-Application
and	O
effects	O
.	O
</s>
<s>
Plug-ins	B-Application
can	O
be	O
installed	O
semi-automatically	O
when	O
they	O
are	O
first	O
needed	O
.	O
</s>
<s>
Since	O
version	O
0.9	O
,	O
the	O
plug-ins	B-Application
come	O
grouped	O
into	O
three	O
sets	O
(	O
named	O
after	O
the	O
film	O
The	O
Good	O
,	O
the	O
Bad	O
and	O
the	O
Ugly	O
)	O
.	O
</s>
<s>
Plug-in	B-Application
set	O
name	O
Description	O
Good	O
This	O
package	O
contains	O
the	O
GStreamer	B-Language
plug-ins	B-Application
from	O
the	O
"	O
good	O
"	O
set	O
,	O
a	O
set	O
of	O
high	O
quality	O
plug-ins	B-Application
under	O
the	O
LGPL	B-Application
license	I-Application
.	O
</s>
<s>
Bad	O
GStreamer	B-Language
Bad	O
Plug-ins	B-Application
comprises	O
a	O
set	O
of	O
plug-ins	B-Application
not	O
up-to-par	O
compared	O
to	O
the	O
rest	O
.	O
</s>
<s>
They	O
might	O
closely	O
approach	O
good-quality	O
plug-ins	B-Application
,	O
but	O
they	O
lack	O
something	O
:	O
perhaps	O
a	O
good	O
code	O
review	O
,	O
some	O
documentation	O
,	O
a	O
set	O
of	O
tests	O
,	O
a	O
real	O
live	O
maintainer	O
,	O
or	O
some	O
actual	O
wide	O
use	O
.	O
</s>
<s>
Ugly	O
This	O
package	O
contains	O
plug-ins	B-Application
from	O
the	O
"	O
ugly	O
"	O
set	O
,	O
a	O
set	O
of	O
good-quality	O
plug-ins	B-Application
that	O
might	O
pose	O
distribution	O
problems	O
.	O
</s>
<s>
Individual	O
distributions	O
may	O
further	O
sub-classify	O
these	O
plug-ins	B-Application
:	O
for	O
example	O
Ubuntu	B-Operating_System
groups	O
the	O
"	O
bad	O
"	O
and	O
"	O
ugly	O
"	O
sets	O
into	O
the	O
"	O
Universe	O
"	O
or	O
the	O
"	O
Multiverse	O
"	O
components	O
.	O
</s>
<s>
In	O
addition	O
,	O
there	O
is	O
a	O
GStreamer	B-Language
FFmpeg	O
plug-in	B-Application
(	O
called	O
gst-libav	O
for	O
historic	O
reasons	O
)	O
that	O
extends	O
the	O
number	O
of	O
supported	O
media	O
formats	O
.	O
</s>
<s>
There	O
are	O
various	O
SIP	B-Architecture
blocks	I-Architecture
that	O
can	O
do	O
the	O
computations	O
to	O
decode	O
certain	O
video	O
codecs	B-General_Concept
,	O
such	O
as	O
PureVideo	O
,	O
UVD	O
,	O
QuickSync	B-Algorithm
Video	I-Algorithm
,	O
TI	O
Ducati	O
and	O
more	O
.	O
</s>
<s>
Such	O
needs	O
to	O
be	O
supported	O
by	O
the	O
device	B-Application
driver	I-Application
,	O
which	O
in	O
turn	O
provides	O
one	O
or	O
multiple	O
interfaces	B-Application
,	O
like	O
VDPAU	B-Application
,	O
VAAPI	B-Application
,	O
Distributed	B-Application
Codec	I-Application
Engine	I-Application
or	O
DXVA	B-General_Concept
to	O
end-user	O
software	O
like	O
MPlayer	B-Application
to	O
access	O
this	O
hardware	O
and	O
offload	O
computation	O
to	O
it	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
use	O
Video	O
Coding	O
Engine	O
with	O
GStreamer	B-Language
through	O
the	O
OpenMAX	B-Application
IL	I-Application
wrapper	O
plugin	B-Application
.	O
</s>
<s>
This	O
is	O
for	O
example	O
possible	O
on	O
the	O
Raspberry	B-Operating_System
Pi	I-Operating_System
.	O
</s>
<s>
The	O
SIP	B-Architecture
core	I-Architecture
present	O
on	O
some	O
Texas	O
Instruments	O
SoCs	O
is	O
also	O
accessible	O
through	O
GStreamer	B-Language
:	O
,	O
,	O
.	O
</s>
<s>
The	O
Good	O
,	O
Bad	O
and	O
Ugly	O
GStreamer	B-Language
plugins	B-Application
mentioned	O
earlier	O
provide	O
,	O
alongside	O
processing	O
elements/filters	O
of	O
all	O
kinds	O
,	O
support	O
for	O
a	O
wide	O
variety	O
of	O
file	O
formats	O
,	O
protocols	O
and	O
multimedia	B-General_Concept
codecs	I-General_Concept
.	O
</s>
<s>
In	O
addition	O
to	O
those	O
,	O
support	O
for	O
more	O
than	O
a	O
hundred	O
compression	O
formats	O
(	O
including	O
MPEG-1	B-Algorithm
,	O
MPEG-2	B-Algorithm
,	O
MPEG-4	B-Algorithm
,	O
H.261	B-Algorithm
,	O
H.263	B-Algorithm
,	O
H.264	B-Application
,	O
RealVideo	B-Algorithm
,	O
MP3	B-Application
,	O
WMV	B-Device
,	O
etc	O
.	O
)	O
</s>
<s>
is	O
transparently	O
provided	O
through	O
the	O
gst-libav	O
plug-in	B-Application
.	O
</s>
<s>
Erik	O
Walthinsen	O
founded	O
the	O
GStreamer	B-Language
project	O
in	O
1999	O
.	O
</s>
<s>
Not	O
long	O
after	O
,	O
GStreamer	B-Language
picked	O
up	O
its	O
first	O
commercial	O
backer	O
.	O
</s>
<s>
Towards	O
the	O
end	O
of	O
January	O
2001	O
,	O
they	O
hired	O
Erik	O
Walthinsen	O
to	O
develop	O
methods	O
for	O
embedding	O
GStreamer	B-Language
in	O
smaller	O
(	O
cell	O
phone-class	O
)	O
devices	O
.	O
</s>
<s>
Another	O
RidgeRun	O
employee	O
,	O
Brock	O
A	O
.	O
Frazier	O
,	O
designed	O
the	O
GStreamer	B-Language
logo	O
.	O
</s>
<s>
GStreamer	B-Language
progress	O
was	O
mostly	O
unaffected	O
.	O
</s>
<s>
This	O
meant	O
the	O
project	O
did	O
release	O
a	O
string	O
of	O
0.6.x	O
and	O
0.8.x	O
releases	O
which	O
was	O
meant	O
to	O
stay	O
binary	B-General_Concept
compatible	I-General_Concept
within	O
those	O
release	O
series	O
.	O
</s>
<s>
Erik	O
Walthinsen	O
more	O
or	O
less	O
left	O
GStreamer	B-Language
development	O
behind	O
during	O
this	O
time	O
,	O
focusing	O
on	O
other	O
ventures	O
.	O
</s>
<s>
Every	O
series	O
is	O
not	O
very	O
popular	O
in	O
the	O
Linux	O
community	O
mostly	O
because	O
of	O
stability	O
issues	O
and	O
a	O
serious	O
lack	O
of	O
features	O
compared	O
to	O
competing	O
projects	O
like	O
Xine	B-Application
,	O
MPlayer	B-Application
,	O
and	O
VLC	B-Application
.	O
</s>
<s>
In	O
2004	O
,	O
a	O
new	O
company	O
was	O
founded	O
,	O
Fluendo	O
,	O
which	O
wanted	O
to	O
use	O
GStreamer	B-Language
to	O
write	O
a	O
streaming	O
server	O
Flumotion	O
and	O
also	O
provide	O
multimedia	O
solutions	O
for	O
GStreamer	B-Language
.	O
</s>
<s>
During	O
this	O
time	O
,	O
Fluendo	O
hired	O
most	O
of	O
the	O
core	O
developers	O
including	O
Wim	O
Taymans	O
and	O
attracted	O
the	O
support	O
of	O
companies	O
such	O
as	O
Nokia	O
and	O
Intel	O
to	O
bring	O
GStreamer	B-Language
to	O
a	O
professional	O
level	O
and	O
drive	O
community	O
adoption	O
.	O
</s>
<s>
With	O
Wim	O
Taymans	O
back	O
at	O
the	O
helm	O
,	O
the	O
core	O
of	O
GStreamer	B-Language
was	O
redesigned	O
and	O
became	O
what	O
is	O
the	O
current	O
0.10.x	O
series	O
,	O
which	O
had	O
its	O
first	O
release	O
(	O
0.10.0	O
)	O
in	O
December	O
2005	O
.	O
</s>
<s>
It	O
has	O
maintained	O
API	B-General_Concept
and	O
ABI	B-Operating_System
compatibility	O
since	O
.	O
</s>
<s>
With	O
a	O
new	O
stable	O
core	O
in	O
place	O
,	O
GStreamer	B-Language
gained	O
in	O
popularity	O
in	O
2006	O
,	O
being	O
used	O
by	O
media	O
players	O
including	O
Totem	B-Language
,	O
Rhythmbox	B-Language
and	O
Banshee	B-Language
with	O
many	O
more	O
to	O
follow	O
.	O
</s>
<s>
In	O
2007	O
,	O
most	O
of	O
the	O
core	O
GStreamer	B-Language
developers	O
left	O
Fluendo	O
,	O
including	O
GStreamer	B-Language
maintainer	O
Wim	O
Taymans	O
who	O
went	O
on	O
to	O
co-found	O
Collabora	O
Multimedia	O
together	O
with	O
other	O
GStreamer	B-Language
veterans	O
,	O
while	O
others	O
joined	O
Sun	O
Microsystems	O
,	O
Oblong	O
Industries	O
,	O
and	O
Songbird	B-Application
.	O
</s>
<s>
Between	O
June	O
2012	O
and	O
August	O
2014	O
,	O
GStreamer	B-Language
0.10	O
was	O
also	O
distributed	O
by	O
Collabora	O
and	O
Fluendo	O
as	O
a	O
multiplatform	O
SDK	B-Application
,	O
on	O
the	O
third-party	O
website	O
(	O
rather	O
than	O
for	O
the	O
upstream	O
community	O
project	O
)	O
.	O
</s>
<s>
The	O
goal	O
was	O
to	O
provide	O
application	O
developers	O
with	O
a	O
SDK	B-Application
that	O
would	O
be	O
functionally	O
identical	O
on	O
Windows	B-Application
,	O
Mac	B-Application
OS	I-Application
X	I-Application
,	O
iOS	B-Application
,	O
and	O
Android	B-Application
.	O
</s>
<s>
The	O
SDK	B-Application
initiative	O
aimed	O
to	O
facilitate	O
the	O
commercial	O
adoption	O
of	O
the	O
GStreamer	B-Language
project	O
,	O
as	O
it	O
provided	O
a	O
standardized	O
entry	O
point	O
to	O
developing	O
multimedia	O
applications	O
with	O
GStreamer	B-Language
,	O
without	O
needing	O
to	O
build	O
the	O
entire	O
platform	O
by	O
oneself	O
.	O
</s>
<s>
Users	O
of	O
the	O
SDK	B-Application
also	O
benefited	O
from	O
,	O
tutorials	O
and	O
instructions	O
specific	O
to	O
that	O
SDK	B-Application
.	O
</s>
<s>
GStreamer	B-Language
1.0	O
was	O
released	O
on	O
September	O
24	O
,	O
2012	O
.	O
</s>
<s>
The	O
1.x	O
series	O
is	O
parallel	O
installable	O
to	O
GStreamer	B-Language
0.10	O
to	O
ease	O
the	O
transition	O
,	O
and	O
provides	O
many	O
architectural	O
advantages	O
over	O
the	O
0.10	O
series	O
.	O
</s>
<s>
Generally	O
speaking	O
,	O
GStreamer	B-Language
1.0	O
brought	O
significant	O
improvements	O
for	O
:	O
</s>
<s>
As	O
the	O
GStreamer	B-Language
roadmap	O
explains	O
,	O
all	O
1.x.y	O
versions	O
carry	O
a	O
-1.0	O
API	B-General_Concept
version	O
suffix	O
and	O
have	O
a	O
stable	O
API/ABI	O
.	O
</s>
<s>
The	O
API/ABI	O
can	O
only	O
be	O
broken	O
by	O
a	O
new	O
major	O
release	O
series	O
(	O
i.e.	O
</s>
<s>
In	O
March	O
2013	O
,	O
the	O
GStreamer	B-Language
project	O
maintainers	O
issued	O
a	O
statement	O
to	O
clarify	O
that	O
the	O
0.10	O
series	O
is	O
no	O
longer	O
maintained	O
.	O
</s>
<s>
The	O
statement	O
reasserted	O
the	O
GStreamer	B-Language
project	O
's	O
willingness	O
to	O
help	O
application	O
and	O
plugin	B-Application
developers	O
migrate	O
to	O
the	O
new	O
technology	O
,	O
and	O
hinted	O
that	O
those	O
for	O
whom	O
switching	O
to	O
the	O
1.x	O
series	O
was	O
still	O
considered	O
impossible	O
could	O
seek	O
assistance	O
from	O
various	O
consulting	O
companies	O
.	O
</s>
<s>
1.2	O
added	O
support	O
for	O
DASH	B-Protocol
adaptive	O
streaming	O
,	O
JPEG2000	O
images	O
,	O
VP9	B-Algorithm
and	O
Daala	B-Application
video	I-Application
,	O
and	O
decoding-only	O
support	O
for	O
WebP	O
.	O
</s>
<s>
Version	O
1.14	O
was	O
released	O
on	O
March	O
19	O
,	O
2018	O
,	O
adding	O
support	O
for	O
WebRTC	B-Protocol
,	O
AV1	B-Application
,	O
Nvidia	B-General_Concept
NVDEC	I-General_Concept
,	O
and	O
Secure	B-Protocol
Reliable	I-Protocol
Transport	I-Protocol
,	O
among	O
other	O
changes	O
.	O
</s>
