<s>
ffdshow	B-Language
is	O
an	O
open-source	O
unmaintained	O
codec	B-General_Concept
library	O
that	O
is	O
mainly	O
used	O
for	O
decoding	O
of	O
video	O
in	O
the	O
MPEG-4	B-Application
ASP	I-Application
(	O
e.g.	O
</s>
<s>
encoded	O
with	O
DivX	B-Application
or	O
Xvid	B-Algorithm
)	O
and	O
H.264/MPEG	B-Application
-4	I-Application
AVC	I-Application
video	B-Application
formats	I-Application
,	O
but	O
it	O
supports	O
numerous	O
other	O
video	O
and	O
audio	O
formats	O
as	O
well	O
.	O
</s>
<s>
It	O
is	O
free	B-Application
software	I-Application
released	O
under	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
2.0	O
,	O
runs	O
on	O
Windows	O
,	O
and	O
is	O
implemented	O
as	O
a	O
Video	B-Device
for	I-Device
Windows	I-Device
(	O
VFW	B-Device
)	O
codec	B-General_Concept
and	O
a	O
DirectShow	O
filter	O
.	O
</s>
<s>
ffdshow	B-Language
does	O
not	O
include	O
a	O
media	B-Device
player	I-Device
or	O
container	O
parsers	O
.	O
</s>
<s>
Instead	O
,	O
after	O
installation	O
of	O
ffdshow	B-Language
,	O
compatible	O
DirectShow	O
or	O
VFW	B-Device
media	B-Device
players	I-Device
such	O
as	O
Media	B-Language
Player	I-Language
Classic	I-Language
,	O
Winamp	B-Application
,	O
and	O
Windows	B-Device
Media	I-Device
Player	I-Device
will	O
use	O
the	O
ffdshow	B-Language
decoder	O
automatically	O
,	O
thus	O
avoiding	O
the	O
need	O
to	O
install	O
separate	O
codecs	B-General_Concept
for	O
the	O
various	O
formats	O
supported	O
by	O
ffdshow	B-Language
.	O
</s>
<s>
The	O
user	O
configures	O
ffdshow	B-Language
's	O
audio	O
and	O
video	O
settings	O
by	O
launching	O
the	O
ffdshow	B-Language
video	O
decoder	O
configuration	O
program	O
independently	O
of	O
any	O
media	B-Device
player	I-Device
.	O
</s>
<s>
For	O
playing	O
transport	O
stream	O
files	O
such	O
as	O
AVC( 	O
H.264	B-Application
)	O
an	O
additional	O
mediasplitter	O
should	O
also	O
be	O
installed	O
.	O
</s>
<s>
ffdshow	B-Language
can	O
be	O
configured	O
to	O
display	O
subtitles	O
,	O
to	O
enable	O
or	O
disable	O
various	O
built-in	O
codecs	B-General_Concept
,	O
to	O
grab	O
screenshots	O
,	O
to	O
enable	O
keyboard	O
control	O
,	O
and	O
to	O
enhance	O
movies	O
with	O
increased	O
resolution	B-Algorithm
,	O
sharpness	O
,	O
and	O
many	O
other	O
post-processing	O
video	O
filters	O
.	O
</s>
<s>
It	O
has	O
the	O
ability	O
to	O
manipulate	O
audio	O
with	O
effects	O
like	O
an	O
equalizer	O
,	O
a	O
Dolby	O
decoder	O
,	O
reverb	O
,	O
Winamp	B-Application
DSP	O
plugins	O
,	O
and	O
more	O
.	O
</s>
<s>
Some	O
of	O
the	O
postprocessing	O
is	O
borrowed	O
from	O
the	O
MPlayer	B-Application
project	O
and	O
AviSynth	B-Application
filters	O
.	O
</s>
<s>
ffdshow	B-Language
uses	O
the	O
libavcodec	B-Language
library	O
and	O
several	O
other	O
free	O
,	O
open	O
source	O
software	O
packages	O
to	O
decode	O
video	O
in	O
most	O
common	O
formats	O
,	O
such	O
as	O
:	O
</s>
<s>
MPEG-4	B-Application
Part	I-Application
2	I-Application
(	O
including	O
video	O
encoded	O
with	O
Xvid	B-Algorithm
,	O
3ivx	B-Algorithm
,	O
and	O
all	O
versions	O
of	O
DivX	B-Application
)	O
.	O
</s>
<s>
Flash	B-Operating_System
Video	I-Operating_System
,	O
H.263	B-Algorithm
and	O
VP6	B-Algorithm
(	O
used	O
by	O
sites	O
such	O
as	O
YouTube	B-General_Concept
)	O
.	O
</s>
<s>
H.264/AVC	B-Application
,	O
Theora	B-Algorithm
,	O
WMV	B-Device
as	O
well	O
as	O
numerous	O
others	O
.	O
</s>
<s>
ffdshow	B-Language
also	O
decodes	O
audio	O
,	O
such	O
as	O
:	O
</s>
<s>
MP3	B-Application
,	O
</s>
<s>
AAC	B-Application
,	O
</s>
<s>
Vorbis	B-Algorithm
formats	O
,	O
among	O
others	O
.	O
</s>
<s>
The	O
post-processing	O
video	O
filters	O
of	O
ffdshow	B-Language
can	O
be	O
used	O
in	O
video	O
editors	O
such	O
as	O
VirtualDub	B-Application
or	O
AviSynth	B-Application
,	O
by	O
configuring	O
the	O
VFW	B-Device
settings	O
.	O
</s>
<s>
In	O
these	O
editors	O
,	O
ffdshow	B-Language
can	O
also	O
be	O
used	O
to	O
encode	O
MPEG-4	O
video	O
compatible	O
with	O
Xvid	B-Algorithm
,	O
DivX	B-Application
,	O
or	O
x264	B-Language
codecs	B-General_Concept
,	O
as	O
well	O
as	O
lossless	O
video	O
and	O
a	O
few	O
other	O
formats	O
supported	O
by	O
libavcodec	B-Language
.	O
</s>
<s>
The	O
first	O
versions	O
of	O
ffdshow	B-Language
were	O
published	O
in	O
May	O
2002	O
,	O
as	O
an	O
alternative	O
to	O
the	O
DivX	B-Application
;	O
-	O
)	O
3.11	O
and	O
DivX	B-Application
5.02	O
(	O
which	O
came	O
bundled	O
with	O
Gator	O
)	O
decoders	O
of	O
the	O
time	O
,	O
and	O
as	O
a	O
way	O
to	O
combine	O
the	O
speed	O
and	O
quality	O
of	O
MPlayer	B-Application
with	O
popular	O
Windows	O
video	O
players	O
.	O
</s>
<s>
It	O
continues	O
to	O
support	O
more	O
formats	O
,	O
new	O
and	O
old	O
,	O
as	O
FFmpeg	B-Library
developers	O
add	O
support	O
for	O
them	O
.	O
</s>
<s>
When	O
he	O
stopped	O
updating	O
the	O
project	O
in	O
2006	O
,	O
new	O
maintainers	O
opened	O
the	O
ffdshow	B-Language
tryouts	I-Language
as	O
a	O
fork	O
,	O
where	O
bug-fixes	O
,	O
stability	O
fixes	O
,	O
new	O
features	O
,	O
and	O
codec	B-General_Concept
updates	O
continued	O
.	O
</s>
<s>
Development	O
of	O
ffdshow	B-Language
tryouts	I-Language
was	O
discontinued	O
in	O
2012	O
with	O
users	O
recommended	O
to	O
use	O
LAV	O
Filters	O
instead	O
.	O
</s>
