<s>
GPAC	B-Language
Project	I-Language
on	I-Language
Advanced	I-Language
Content	I-Language
(	O
GPAC	O
,	O
a	O
recursive	O
acronym	O
)	O
is	O
an	O
implementation	O
of	O
the	O
MPEG-4	B-Algorithm
Systems	O
standard	O
written	O
in	O
ANSI	O
C	B-Language
.	O
GPAC	O
provides	O
tools	O
for	O
media	O
playback	O
,	O
vector	O
graphics	O
and	O
3D	O
rendering	O
,	O
MPEG-4	B-Algorithm
authoring	O
and	O
distribution	O
.	O
</s>
<s>
GPAC	O
is	O
cross-platform	B-Operating_System
.	O
</s>
<s>
It	O
is	O
written	O
in	O
(	O
almost	O
100%	O
ANSI	O
)	O
C	B-Language
for	O
portability	O
reasons	O
,	O
attempting	O
to	O
keep	O
the	O
memory	O
footprint	O
as	O
low	O
as	O
possible	O
.	O
</s>
<s>
It	O
is	O
currently	O
running	O
under	O
Windows	B-Application
,	O
Linux	B-Application
,	O
Solaris	O
,	O
Windows	B-Operating_System
CE	I-Operating_System
(	O
SmartPhone	O
,	O
PocketPC	O
2002/2003	O
)	O
,	O
iOS	O
,	O
Android	O
,	O
Embedded	B-Application
Linux	I-Application
(	O
familiar	O
8	O
,	O
GPE	O
)	O
and	O
recent	O
Symbian	B-Operating_System
OS	I-Operating_System
systems	O
.	O
</s>
<s>
In	O
2003	O
,	O
it	O
became	O
an	O
open-source	B-Application
project	O
,	O
with	O
the	O
initial	O
goal	O
of	O
developing	O
from	O
scratch	O
,	O
in	O
ANSI	O
C	B-Language
,	O
clean	O
software	O
compliant	O
with	O
the	O
MPEG-4	B-Algorithm
Systems	O
standard	O
,	O
as	O
a	O
small	O
and	O
flexible	O
alternative	O
to	O
the	O
MPEG-4	B-Algorithm
reference	O
software	O
.	O
</s>
<s>
In	O
parallel	O
,	O
the	O
project	O
has	O
evolved	O
and	O
now	O
supports	O
many	O
other	O
multimedia	O
standards	O
,	O
with	O
support	O
for	O
X3D	B-Application
,	O
W3C	O
SVG	O
Tiny	O
1.2	O
,	O
and	O
OMA/3GPP/ISMA	O
and	O
MPEG	O
Dynamic	B-Protocol
Adaptive	I-Protocol
Streaming	I-Protocol
over	I-Protocol
HTTP	I-Protocol
(	O
MPEG-DASH	B-Protocol
)	O
features	O
.	O
</s>
<s>
3D	O
support	O
is	O
available	O
on	O
embedded	O
platforms	O
through	O
OpenGL-ES	O
.	O
</s>
<s>
The	O
MPEG-DASH	B-Protocol
feature	O
can	O
be	O
used	O
to	O
reconstruct	O
.mp4	O
files	O
from	O
videos	O
streamed	O
and	O
cached	B-Protocol
in	O
this	O
format	O
(	O
e.g.	O
,	O
YouTube	O
)	O
.	O
</s>
<s>
GPAC	O
features	O
encoders	O
and	O
multiplexers	O
,	O
publishing	O
and	O
content	O
distribution	O
tools	O
for	O
MP4	O
files	O
and	O
many	O
tools	O
for	O
scene	O
descriptions	O
(	O
BIFS/VRML/X3D	O
converters	O
,	O
SWF/BIFS	O
,	O
SVG/BIFS	O
,	O
etc	O
....	O
)	O
.	O
</s>
<s>
MP4Box	B-Language
provides	O
all	O
these	O
tools	O
in	O
a	O
single	O
command-line	O
application	O
,	O
albeit	O
with	O
extremely	O
arcane	O
syntax	O
.	O
</s>
<s>
MP4/3GP	O
Conversion	O
from	O
MP3	B-Application
,	O
AVI	O
,	O
MPEG-2	O
TS	O
,	O
MPEG-PS	O
,	O
AAC	B-Application
,	O
H263	B-Algorithm
,	O
H264	B-Application
,	O
AMR	B-Algorithm
,	O
and	O
many	O
others	O
,	O
</s>
<s>
File	O
hinting	O
for	O
RTP/RTSP	O
and	O
QTSS/DSS	O
servers	O
(	O
MPEG-4/ISMA/3GP/	O
3GP2	O
files	O
)	O
,	O
</s>
<s>
XML	B-Protocol
information	O
dumping	O
for	O
MP4	O
and	O
RTP	B-Protocol
hint	O
tracks	O
,	O
</s>
<s>
LASeR	O
codec	O
and	O
scene	O
conversion	O
between	O
MP4	O
,	O
SAF	O
,	O
SVG	O
and	O
XSR	O
(	O
XML	B-Protocol
LASeR	O
)	O
,	O
</s>
<s>
XML	B-Protocol
scene	O
statistics	O
for	O
BIFS	O
scene	O
(	O
BT	O
,	O
XMT-A	O
and	O
MP4	O
)	O
,	O
</s>
<s>
Conversion	O
to	O
and	O
from	O
BT	O
,	O
XMT-A	O
,	O
WRL	B-Application
,	O
X3D	B-Application
and	O
X3DV	B-Application
with	O
support	O
for	O
gzip	O
.	O
</s>
<s>
VRML	B-Application
2.0	O
(	O
VRML97	B-Application
)	O
scenes	O
(	O
without	O
GEO	O
or	O
NURBS	O
extensions	O
)	O
,	O
</s>
<s>
X3D	B-Application
scenes	O
(	O
not	O
complete	O
)	O
in	O
X3D	B-Application
(	O
XML	B-Protocol
)	O
and	O
X3DV	B-Application
(	O
VRML	B-Application
)	O
formats	O
,	O
</s>
<s>
Progressive	O
loading/rendering	O
of	O
SVG	O
,	O
X3D	B-Application
and	O
XMT	O
files	O
,	O
</s>
<s>
HTTP	B-Protocol
reading	O
of	O
all	O
scene	O
descriptions	O
,	O
</s>
<s>
GZIP	O
supported	O
for	O
all	O
textual	O
formats	O
of	O
MPEG4/X3D/VRML/SVG	O
,	O
</s>
<s>
MP4	O
and	O
3GPP	O
file	O
reading	O
(	O
local	O
&	O
http	B-Protocol
)	O
,	O
</s>
<s>
MP3	B-Application
and	O
AAC	B-Application
files	I-Application
(	O
local	O
&	O
http	B-Protocol
)	O
and	O
HTTP	B-Protocol
streaming	O
(	O
ShoutCast/ICEcast	O
radios	O
)	O
,	O
</s>
<s>
3GPP	O
Timed	O
Text	O
/	O
MPEG-4	B-Algorithm
Streaming	O
Text	O
,	O
</s>
<s>
MPEG-2	O
TS	O
demultiplexer	O
(	O
local/UDP/RTP	O
)	O
with	O
DVB	O
support	O
(	O
Linux	B-Application
only	O
)	O
,	O
</s>
<s>
Streaming	O
support	O
through	O
RTP/RTCP	O
(	O
unicast	O
and	O
multicast	O
)	O
and	O
RTSP/SDP	O
,	O
</s>
<s>
Plugins	O
for	O
Mozilla	O
(	O
osmozilla	O
,	O
Win32	O
and	O
Linux	B-Application
)	O
and	O
Internet	O
Explorer	O
(	O
GPAX	O
,	O
Win32	O
and	O
PPC	O
2003	O
)	O
.	O
</s>
<s>
MP4/3GP	O
file	O
RTP	B-Protocol
streamer	O
(	O
unicast	O
and	O
multicast	O
)	O
,	O
</s>
<s>
RTP	B-Protocol
streamer	O
with	O
service	O
timeslicing	O
(	O
DVB-H	O
)	O
simulation	O
,	O
</s>
<s>
MPEG-2	O
TS	O
broadcaster	O
using	O
MP4/3GP	O
files	O
or	O
RTP	B-Protocol
streams	O
as	O
inputs	O
,	O
</s>
<s>
BIFS	O
RTP	B-Protocol
broadcaster	O
tool	O
performing	O
live	O
encoding	O
and	O
RandomAccessPoints	O
generation	O
.	O
</s>
