<s>
VP8	B-Algorithm
is	O
an	O
open	O
and	O
royalty-free	O
video	B-Algorithm
compression	I-Algorithm
format	I-Algorithm
released	O
by	O
On2	B-Application
Technologies	I-Application
in	O
2008	O
.	O
</s>
<s>
Initially	O
released	O
as	O
a	O
proprietary	B-Application
successor	O
to	O
On2	B-Application
's	O
previous	O
VP7	O
format	O
,	O
VP8	B-Algorithm
was	O
released	O
as	O
an	O
open	O
and	O
royalty-free	O
format	O
in	O
May	O
2010	O
after	O
Google	B-Application
acquired	O
On2	B-Application
Technologies	I-Application
.	O
</s>
<s>
Google	B-Application
provided	O
an	O
irrevocable	O
patent	O
promise	O
on	O
its	O
patents	O
for	O
implementing	O
the	O
VP8	B-Algorithm
format	O
,	O
and	O
released	O
a	O
specification	O
of	O
the	O
format	O
under	O
the	O
Creative	O
Commons	O
Attribution	O
3.0	O
license	O
.	O
</s>
<s>
That	O
same	O
year	O
,	O
Google	B-Application
also	O
released	O
libvpx	B-Language
,	O
the	O
reference	O
implementation	O
of	O
VP8	B-Algorithm
,	O
under	O
the	O
revised	O
BSD	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
Opera	B-Application
,	O
Firefox	B-Application
,	O
Chrome	B-Application
,	O
and	O
Chromium	B-Language
support	O
playing	O
VP8	B-Algorithm
video	O
in	O
HTML5	B-Application
video	O
tag	O
.	O
</s>
<s>
Internet	B-Application
Explorer	I-Application
officially	O
supports	O
VP8	B-Algorithm
if	O
the	O
user	O
has	O
the	O
DirectShow	B-Library
filter	O
installed	O
.	O
</s>
<s>
According	O
to	O
Google	B-Application
,	O
VP8	B-Algorithm
is	O
mainly	O
used	O
in	O
connection	O
with	O
WebRTC	B-Protocol
and	O
as	O
a	O
format	O
for	O
short	O
looped	O
animations	O
,	O
as	O
a	O
replacement	O
for	O
the	O
Graphics	O
Interchange	O
Format	O
(	O
GIF	O
)	O
.	O
</s>
<s>
VP8	B-Algorithm
can	O
be	O
multiplexed	O
into	O
the	O
Matroska-based	O
container	O
format	O
WebM	B-Application
along	O
with	O
Vorbis	B-Algorithm
and	O
Opus	B-Algorithm
audio	O
.	O
</s>
<s>
The	O
image	O
format	O
WebP	O
is	O
based	O
on	O
VP8	B-Algorithm
's	O
intra-frame	O
coding	O
.	O
</s>
<s>
VP8	B-Algorithm
's	O
direct	O
successor	O
,	O
VP9	B-Algorithm
,	O
and	O
the	O
emerging	O
royalty-free	O
internet	O
video	O
format	O
AV1	B-Application
from	O
the	O
Alliance	O
for	O
Open	O
Media	O
(	O
AOMedia	O
)	O
are	O
based	O
on	O
VP8	B-Algorithm
.	O
</s>
<s>
VP8	B-Algorithm
only	O
supports	O
progressive	B-Device
scan	I-Device
video	O
signals	O
with	O
4:2:0	O
chroma	O
subsampling	O
and	O
8bits	O
per	O
sample	B-Algorithm
.	O
</s>
<s>
In	O
its	O
first	O
public	O
version	O
,	O
On2	B-Application
's	O
VP8	B-Algorithm
implementation	O
supports	O
multi-core	B-Architecture
processors	I-Architecture
with	O
up	O
to	O
64	O
cores	O
simultaneously	O
.	O
</s>
<s>
At	O
least	O
in	O
the	O
implementation	O
(	O
from	O
August	O
2011	O
)	O
,	O
VP8	B-Algorithm
is	O
comparatively	O
badly	O
adapted	O
to	O
high	O
resolutions	O
(	O
HD	O
)	O
.	O
</s>
<s>
With	O
only	O
three	O
reference	O
frame	O
buffers	O
needed	O
,	O
VP8	B-Algorithm
enables	O
for	O
decoder	O
implementations	O
with	O
a	O
relatively	O
small	O
memory	O
footprint	O
.	O
</s>
<s>
VP8	B-Algorithm
is	O
a	O
traditional	O
block-based	O
transform	B-Algorithm
coding	O
format	O
.	O
</s>
<s>
It	O
has	O
much	O
in	O
common	O
with	O
H.264	B-Application
,	O
e.g.	O
</s>
<s>
At	O
the	O
time	O
of	O
first	O
presentation	O
of	O
VP8	B-Algorithm
,	O
according	O
to	O
On2	B-Application
the	O
in-loop	O
filter	O
and	O
the	O
Golden	O
Frames	O
were	O
among	O
the	O
novelties	O
of	O
this	O
iteration	O
.	O
</s>
<s>
The	O
first	O
definition	O
of	O
such	O
a	O
filter	O
is	O
already	O
found	O
in	O
the	O
H.263	B-Algorithm
standard	O
,	O
though	O
,	O
and	O
Golden	O
Frames	O
were	O
already	O
in	O
use	O
in	O
VP5	O
and	O
VP7	O
.	O
</s>
<s>
The	O
discrete	B-General_Concept
cosine	I-General_Concept
transform	I-General_Concept
(	O
DCT	B-General_Concept
)	O
on	O
4×4	O
blocks	O
and	O
the	O
Hadamard	B-Algorithm
transform	I-Algorithm
(	O
WHT	O
)	O
serve	O
as	O
basic	O
frequency	B-Algorithm
transforms	I-Algorithm
.	O
</s>
<s>
VP8	B-Algorithm
offers	O
two	O
different	O
adjustable	O
deblocking	B-General_Concept
filters	I-General_Concept
that	O
are	O
integrated	O
into	O
the	O
codec	O
loops	O
(	O
in-loop	O
filtering	O
)	O
.	O
</s>
<s>
VP8	B-Algorithm
was	O
first	O
released	O
by	O
On2	B-Application
Technologies	I-Application
on	O
September	O
13	O
,	O
2008	O
,	O
as	O
On2	B-Application
TrueMotion	B-Application
VP8	B-Algorithm
,	O
replacing	O
its	O
predecessor	O
,	O
VP7	O
.	O
</s>
<s>
After	O
Google	B-Application
acquired	O
On2	B-Application
in	O
February	O
2010	O
,	O
</s>
<s>
calls	O
for	O
Google	B-Application
to	O
release	O
the	O
VP8	B-Algorithm
source	O
code	O
were	O
made	O
.	O
</s>
<s>
Most	O
notably	O
,	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
issued	O
an	O
open	O
letter	O
on	O
March	O
12	O
,	O
2010	O
,	O
asking	O
Google	B-Application
to	O
gradually	O
replace	O
the	O
usage	O
of	O
Adobe	B-Operating_System
Flash	I-Operating_System
Player	I-Operating_System
and	O
H.264	B-Application
on	O
YouTube	B-General_Concept
with	O
a	O
mixture	O
of	O
HTML5	B-Application
and	O
a	O
freed	O
VP8	B-Algorithm
.	O
</s>
<s>
On	O
May	O
19	O
,	O
at	O
its	O
Google	B-Application
I/O	I-Application
conference	O
,	O
Google	B-Application
released	O
the	O
VP8	B-Algorithm
codec	O
software	O
under	O
a	O
BSD-like	O
license	O
and	O
the	O
VP8	B-Algorithm
bitstream	B-General_Concept
format	I-General_Concept
specification	O
under	O
an	O
irrevocable	O
free	O
patent	O
license	O
.	O
</s>
<s>
This	O
made	O
VP8	B-Algorithm
the	O
second	O
product	O
from	O
On2	B-Application
Technologies	I-Application
to	O
be	O
opened	O
,	O
following	O
their	O
donation	O
of	O
the	O
VP3	B-Algorithm
codec	O
in	O
2002	O
to	O
the	O
Xiph.Org	B-Application
Foundation	I-Application
,	O
from	O
which	O
they	O
derived	O
the	O
Theora	B-Algorithm
codec	I-Algorithm
.	O
</s>
<s>
In	O
February	O
2011	O
,	O
MPEG	O
LA	O
invited	O
patent	O
holders	O
to	O
identify	O
patents	O
that	O
may	O
be	O
essential	O
to	O
VP8	B-Algorithm
in	O
order	O
to	O
form	O
a	O
joint	O
VP8	B-Algorithm
patent	O
pool	O
.	O
</s>
<s>
In	O
July	O
2011	O
,	O
MPEG	O
LA	O
announced	O
that	O
12	O
patent	O
holders	O
had	O
responded	O
to	O
its	O
call	O
to	O
form	O
a	O
VP8	B-Algorithm
patent	O
pool	O
,	O
without	O
revealing	O
the	O
patents	O
in	O
question	O
,	O
and	O
despite	O
On2	B-Application
having	O
gone	O
to	O
great	O
lengths	O
to	O
avoid	O
such	O
patents	O
.	O
</s>
<s>
In	O
November	O
2011	O
,	O
the	O
Internet	O
Engineering	O
Task	O
Force	O
published	O
the	O
informational	O
RFC	O
6386	O
,	O
VP8	B-Algorithm
Data	O
Format	O
and	O
Decoding	O
Guide	O
.	O
</s>
<s>
In	O
March	O
2013	O
,	O
MPEG	O
LA	O
announced	O
that	O
it	O
had	O
dropped	O
its	O
effort	O
to	O
form	O
a	O
VP8	B-Algorithm
patent	O
pool	O
after	O
reaching	O
an	O
agreement	O
with	O
Google	B-Application
to	O
license	O
the	O
patents	O
that	O
it	O
alleges	O
"	O
may	O
be	O
essential	O
"	O
for	O
VP8	B-Algorithm
implementation	O
,	O
and	O
granted	O
Google	B-Application
the	O
right	O
to	O
sub-license	O
these	O
patents	O
to	O
any	O
third-party	O
user	O
of	O
VP8	B-Algorithm
or	O
VP9	B-Algorithm
.	O
</s>
<s>
This	O
deal	O
has	O
cleared	O
the	O
way	O
for	O
possible	O
MPEG	O
standardisation	O
as	O
its	O
royalty-free	O
internet	O
video	O
codec	O
,	O
after	O
Google	B-Application
submitted	O
VP8	B-Algorithm
to	O
the	O
MPEG	O
committee	O
in	O
January	O
2013	O
.	O
</s>
<s>
In	O
March	O
2013	O
,	O
Nokia	O
asserted	O
a	O
patent	O
claim	O
against	O
HTC	B-Application
and	O
Google	B-Application
for	O
the	O
use	O
of	O
VP8	B-Algorithm
in	O
Android	B-Application
in	O
a	O
German	O
court	O
;	O
however	O
,	O
on	O
August	O
5	O
,	O
2013	O
,	O
the	O
webm	B-Application
project	I-Application
announced	O
that	O
the	O
German	O
court	O
has	O
ruled	O
that	O
VP8	B-Algorithm
does	O
not	O
infringe	O
Nokia	O
's	O
patent	O
.	O
</s>
<s>
Nokia	O
has	O
made	O
an	O
official	O
intellectual	O
property	O
rights	O
(	O
IPR	O
)	O
declaration	O
to	O
the	O
IETF	O
with	O
respect	O
to	O
the	O
VP8	B-Algorithm
Data	O
Format	O
and	O
Decoding	O
Guide	O
listing	O
64	O
granted	O
patents	O
and	O
22	O
pending	O
patent	O
applications	O
.	O
</s>
<s>
The	O
reference	O
implementation	O
of	O
a	O
VP8	B-Algorithm
(	O
and	O
VP9	B-Algorithm
)	O
codec	O
is	O
found	O
in	O
the	O
programming	B-Library
library	I-Library
libvpx	B-Language
which	O
is	O
released	O
as	O
free	B-Application
software	I-Application
.	O
</s>
<s>
Currently	O
,	O
libvpx	B-Language
is	O
primary	O
software	B-Library
library	I-Library
capable	O
of	O
encoding	O
VP8	B-Algorithm
video	O
streams	O
,	O
but	O
at	O
least	O
one	O
independent	O
implementation	O
exists	O
in	O
.	O
</s>
<s>
A	O
Video	B-Device
for	I-Device
Windows	I-Device
wrapper	O
of	O
the	O
VP8	B-Algorithm
codec	O
based	O
on	O
the	B-Application
Google	I-Application
VP8	B-Algorithm
library	O
(	O
FourCC	B-Application
:	O
VP80	O
)	O
is	O
available	O
.	O
</s>
<s>
The	O
WebM	B-Application
Project	I-Application
hardware	O
team	O
in	O
Finland	O
released	O
an	O
RTL	O
hardware	O
encoder	O
for	O
VP8	B-Algorithm
that	O
is	O
available	O
at	O
no	O
cost	O
for	O
semiconductor	O
manufacturers	O
.	O
</s>
<s>
The	O
Nvidia	B-Operating_System
Tegra	I-Operating_System
mobile	O
chipsets	O
have	O
full	O
VP8	B-Algorithm
hardware	O
encoding	O
and	O
decoding	O
(	O
since	O
Tegra	B-Operating_System
4	O
)	O
.	O
</s>
<s>
libvpx	B-Language
is	O
capable	O
of	O
decoding	O
VP8	B-Algorithm
video	O
streams	O
.	O
</s>
<s>
On	O
July	O
23	O
,	O
2010	O
,	O
Fiona	O
Glaser	O
,	O
Ronald	O
Bultje	O
,	O
and	O
David	O
Conrad	O
of	O
the	O
FFmpeg	B-Library
Team	O
announced	O
the	O
ffvp8	B-Library
decoder	O
.	O
</s>
<s>
Through	O
testing	O
they	O
determined	O
that	O
ffvp8	B-Library
was	O
faster	O
than	O
Google	B-Application
's	I-Application
own	O
libvpx	B-Language
decoder	O
.	O
</s>
<s>
The	O
WebM	B-Application
Project	I-Application
hardware	O
team	O
released	O
an	O
RTL	O
hardware	O
decoder	O
for	O
VP8	B-Algorithm
,	O
that	O
is	O
releasable	O
to	O
semiconductor	O
companies	O
at	O
zero	O
cost	O
.	O
</s>
<s>
TATVIK	O
Technologies	O
announced	O
a	O
VP8	B-Algorithm
decoder	O
that	O
is	O
optimized	O
for	O
the	O
ARM	B-Application
Cortex-A8	I-Application
processor	O
.	O
</s>
<s>
Marvell	O
's	O
ARMADA	O
1500-mini	O
chipset	O
has	O
VP8	B-Algorithm
SD	O
and	O
HD	O
hardware	O
decoding	O
support	O
(	O
used	O
in	O
Chromecast	B-Device
)	O
.	O
</s>
<s>
Intel	O
has	O
full	O
VP8	B-Algorithm
decoding	O
support	O
built	O
into	O
their	O
Bay	B-Application
Trail	I-Application
chipsets	I-Application
.	O
</s>
<s>
Intel	B-General_Concept
Broadwell	I-General_Concept
also	O
adds	O
VP8	B-Algorithm
hardware	O
decoding	O
support	O
.	O
</s>
<s>
+	O
VP8	B-Algorithm
support	O
by	O
different	O
operating	O
systems	O
Microsoft	B-Application
Windows	I-Application
macOS	B-Application
BSD	B-Operating_System
/	O
Linux	B-Application
Android	B-Application
OS	I-Application
iOS	B-Application
Codec	O
support	O
Container	O
support	O
On	O
Windows	B-Operating_System
10	I-Operating_System
Anniversary	O
Update	O
(	O
1607	O
)	O
:	O
WebM	B-Application
(	O
.webm	B-Application
is	O
not	O
recognised	O
;	O
requires	O
pseudo	O
extension	O
)	O
Matroska	O
(	O
.mkv	O
)	O
On	O
Windows	B-Operating_System
10	I-Operating_System
October	O
2018	O
Update	O
(	O
1809	O
)	O
:	O
WebM	B-Application
(	O
.webm	B-Application
is	O
recognised	O
officially	O
)	O
WebM	B-Application
(	O
.webm	B-Application
)	O
Matroska	O
(	O
.mkv	O
)	O
WebM	B-Application
(	O
.webm	B-Application
)	O
Matroska	O
(	O
.mkv	O
)	O
WebM	B-Application
(	O
.webm	B-Application
)	O
Matroska	O
(	O
.mkv	O
)	O
WebM	B-Application
(	O
.webm	B-Application
)	O
Matroska	O
(	O
.mkv	O
)	O
Notes	O
On	O
Windows	B-Operating_System
10	I-Operating_System
:	O
-	O
On	O
Anniversary	O
Update	O
(	O
1607	O
)	O
,	O
limited	O
support	O
is	O
available	O
in	O
Microsoft	B-Application
Edge	I-Application
(	O
via	O
MSE	B-Language
only	O
)	O
and	O
Universal	B-Device
Windows	I-Device
Platform	I-Device
apps	O
.	O
</s>
<s>
-	O
On	O
April	O
2018	O
Update	O
(	O
1803	O
)	O
with	O
Web	O
Media	O
Extensions	O
preinstalled	O
,	O
Microsoft	B-Application
Edge	I-Application
(	O
EdgeHTML	O
17	O
)	O
supports	O
VP8	B-Algorithm
videos	O
embedded	O
in	O
<video>	O
tags	O
.	O
</s>
<s>
-	O
On	O
October	O
2018	O
Update	O
(	O
1809	O
)	O
,	O
VP9	B-Algorithm
Video	O
Extensions	O
is	O
preinstalled	O
.	O
</s>
<s>
It	O
enables	O
encoding	O
of	O
VP8	B-Algorithm
and	O
VP9	B-Algorithm
content	O
on	O
devices	O
that	O
do	O
n't	O
have	O
a	O
hardware-based	O
video	O
encoder	O
.	O
</s>
<s>
No	O
native	O
support	O
in	O
the	O
macOS	B-Application
native	O
multimedia	O
framework	O
.	O
</s>
<s>
-	O
-	O
Support	O
introduced	O
in	O
Android	B-Application
2.3.3	O
+	O
-	O
Streamable	O
in	O
Android	B-Application
4.0	O
+	O
No	O
native	O
support	O
in	O
the	O
iOS	B-Application
native	O
multimedia	O
framework	O
.	O
</s>
<s>
Also	O
on	O
May	O
19	O
,	O
2010	O
,	O
the	O
WebM	B-Application
Project	I-Application
was	O
launched	O
,	O
featuring	O
contributions	O
from	O
"	O
Mozilla	O
,	O
Opera	B-Application
,	O
Google	B-Application
and	O
more	O
than	O
forty	O
other	O
publishers	O
,	O
software	O
and	O
hardware	O
vendors	O
"	O
in	O
a	O
major	O
effort	O
to	O
use	O
VP8	B-Algorithm
as	O
the	O
video	O
format	O
for	O
HTML5	B-Application
.	O
</s>
<s>
In	O
the	O
WebM	B-Application
container	O
format	O
,	O
the	O
VP8	B-Algorithm
video	O
is	O
used	O
with	O
Vorbis	B-Algorithm
or	O
Opus	B-Algorithm
audio	O
.	O
</s>
<s>
Internet	B-Application
Explorer	I-Application
9	O
will	O
support	O
VP8	B-Algorithm
video	O
playback	O
if	O
the	O
proper	O
codec	O
is	O
installed	O
.	O
</s>
<s>
Android	B-Application
is	O
WebM-enabled	O
from	O
version	O
2.3	O
-	O
Gingerbread	O
.	O
</s>
<s>
Since	O
Android	B-Application
4.0	O
,	O
VP8	B-Algorithm
could	O
be	O
read	O
inside	O
mkv	O
and	O
WebM	B-Application
could	O
be	O
streamed	O
.	O
</s>
<s>
Adobe	O
also	O
announced	O
that	O
the	O
Flash	B-Operating_System
Player	I-Operating_System
will	O
support	O
VP8	B-Algorithm
playback	O
in	O
a	O
future	O
release	O
.	O
</s>
<s>
On	O
September	O
30	O
,	O
2010	O
,	O
Google	B-Application
announced	O
WebP	O
,	O
their	O
new	O
image	O
format	O
,	O
on	O
the	O
Chromium	B-Language
blog	O
.	O
</s>
<s>
WebP	O
is	O
based	O
on	O
VP8	B-Algorithm
's	O
intra-frame	O
coding	O
and	O
uses	O
a	O
container	O
based	O
on	O
Resource	O
Interchange	O
File	O
Format	O
(	O
RIFF	O
)	O
.	O
</s>
<s>
While	O
H.264/MPEG	B-Application
-4	I-Application
AVC	I-Application
contains	O
patented	O
technology	O
and	O
requires	O
licenses	O
from	O
patent	O
holders	O
and	O
limited	O
royalties	O
for	O
hardware	O
,	O
Google	B-Application
has	O
irrevocably	O
released	O
the	O
VP8	B-Algorithm
patents	O
it	O
owns	O
under	O
a	O
royalty-free	O
public	O
license	O
.	O
</s>
<s>
According	O
to	O
a	O
comparison	O
of	O
VP8	B-Algorithm
(	O
encoded	O
with	O
the	O
initial	O
release	O
of	O
libvpx	B-Language
)	O
and	O
H.264	B-Application
conducted	O
by	O
StreamingMedia	O
,	O
it	O
was	O
concluded	O
that	O
"	O
H.264	B-Application
may	O
have	O
a	O
slight	O
quality	O
advantage	O
,	O
but	O
it	O
's	O
not	O
commercially	O
relevant	O
"	O
and	O
that	O
"	O
Even	O
watching	O
side-by-side	O
(	O
which	O
no	O
viewer	O
ever	O
does	O
)	O
,	O
very	O
few	O
viewers	O
could	O
tell	O
the	O
difference	O
"	O
.	O
</s>
<s>
They	O
also	O
stated	O
that	O
"	O
H.264	B-Application
has	O
an	O
implementation	O
advantage	O
,	O
not	O
a	O
technology	O
advantage.	O
"	O
</s>
<s>
Google	B-Application
claims	O
that	O
VP8	B-Algorithm
offers	O
the	O
"	O
highest	O
quality	O
real-time	O
video	O
delivery	O
"	O
and	O
Libvpx	B-Language
includes	O
a	O
mode	O
where	O
the	O
maximum	O
CPU	O
resources	O
possible	O
will	O
be	O
used	O
while	O
still	O
keeping	O
the	O
encoding	O
speed	O
almost	O
exactly	O
equivalent	O
to	O
the	O
playback	O
speed	O
(	O
realtime	O
)	O
,	O
keeping	O
the	O
quality	O
as	O
high	O
as	O
possible	O
without	O
lag	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
a	O
review	O
conducted	O
by	O
streamingmedia.com	O
in	O
May	O
2010	O
concluded	O
that	O
H.264	B-Application
offers	O
slightly	O
better	O
quality	O
than	O
VP8	B-Algorithm
.	O
</s>
<s>
In	O
September	O
2010	O
Fiona	O
Glaser	O
,	O
a	O
developer	O
of	O
the	O
x264	B-Language
encoder	O
,	O
gave	O
several	O
points	O
of	O
criticism	O
for	O
VP8	B-Algorithm
,	O
claiming	O
that	O
its	O
specification	O
was	O
incomplete	O
,	O
and	O
the	O
performance	O
of	O
the	O
encoder	O
's	O
deblocking	B-General_Concept
filter	I-General_Concept
was	O
inferior	O
to	O
x264	B-Language
in	O
some	O
areas	O
.	O
</s>
<s>
In	O
its	O
specification	O
,	O
VP8	B-Algorithm
should	O
be	O
a	O
bit	O
better	O
than	O
H.264	B-Application
Baseline	O
Profile	O
and	O
Microsoft	O
's	O
VC-1	B-Operating_System
.	O
</s>
<s>
Encoding	O
is	O
somewhere	O
between	O
Xvid	B-Algorithm
and	O
VC-1	B-Operating_System
.	O
</s>
<s>
Decoding	O
is	O
slower	O
than	O
FFmpeg	B-Library
's	O
H.264	B-Application
,	O
but	O
this	O
aspect	O
can	O
hardly	O
be	O
improved	O
due	O
to	O
the	O
similarities	O
to	O
H.264	B-Application
.	O
</s>
<s>
Compression-wise	O
,	O
VP8	B-Algorithm
offers	O
better	O
performance	O
than	O
Theora	B-Algorithm
and	O
Dirac	B-Application
.	O
</s>
<s>
According	O
to	O
Glaser	O
,	O
the	O
VP8	B-Algorithm
interface	O
lacks	O
features	O
and	O
is	O
buggy	O
,	O
and	O
the	O
specification	O
is	O
not	O
fully	O
defined	O
and	O
could	O
be	O
considered	O
incomplete	O
.	O
</s>
<s>
Much	O
of	O
the	O
VP8	B-Algorithm
code	O
is	O
copy-pasted	O
,	O
and	O
since	O
the	O
source	O
constitutes	O
the	O
actual	O
specification	O
,	O
any	O
bugs	O
will	O
also	O
be	O
defined	O
as	O
something	O
that	O
has	O
to	O
be	O
implemented	O
to	O
be	O
in	O
compliance	O
.	O
</s>
<s>
In	O
2010	O
,	O
it	O
was	O
announced	O
that	O
the	O
WebM	B-Application
audio/video	O
format	O
would	O
be	O
based	O
on	O
a	O
profile	O
of	O
the	O
Matroska	O
container	O
format	O
together	O
with	O
VP8	B-Algorithm
video	O
and	O
Vorbis	B-Algorithm
audio	O
.	O
</s>
