<s>
RatDVD	B-Application
(	O
originally	O
stylized	O
"	O
ratDVD	B-Application
"	O
)	O
is	O
the	O
name	O
of	O
a	O
proprietary	O
container	O
format	O
for	O
digital	O
video	O
,	O
developed	O
by	O
Peter	O
Jensen	O
and	O
a	O
group	O
of	O
Russian	O
and	O
Danish	O
university	O
students	O
.	O
</s>
<s>
The	O
container	O
format	O
is	O
a	O
compressed	B-Application
archive	I-Application
format	O
that	O
holds	O
all	O
features	O
of	O
DVD-Video	O
in	O
a	O
single	O
file	O
.	O
</s>
<s>
RatDVD	B-Application
files	O
are	O
created	O
by	O
a	O
computer	O
program	O
of	O
the	O
same	O
name	O
.	O
</s>
<s>
The	O
video	O
portion	O
of	O
a	O
RatDVD	B-Application
file	O
is	O
compression	O
by	O
a	O
proprietary	O
video	B-Application
codec	I-Application
named	O
"	O
XEB	O
"	O
,	O
thus	O
significantly	O
reducing	O
the	O
overall	O
size	O
:	O
A	O
typical	O
DVD	O
(	O
usually	O
above	O
4	O
gigabytes	O
)	O
can	O
be	O
compressed	B-General_Concept
to	O
about	O
1	O
or	O
2	O
GB	O
,	O
with	O
some	O
loss	O
in	O
video	O
quality	O
due	O
to	O
recompression	O
.	O
</s>
<s>
The	O
resulting	O
RatDVD	B-Application
file	O
can	O
then	O
be	O
played	O
directly	O
in	O
a	O
computer	O
(	O
as	O
long	O
as	O
the	O
needed	O
codec	O
has	O
been	O
installed	O
)	O
by	O
a	O
DirectShow-compatible	O
DVD	O
player	O
,	O
or	O
converted	O
back	O
into	O
standard	O
DVD	O
format	O
.	O
</s>
<s>
RatDVD	B-Application
program	O
is	O
freeware	B-License
and	O
works	O
on	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
The	O
last	O
version	O
of	O
this	O
freeware	B-License
was	O
0.78	O
and	O
was	O
released	O
in	O
2005	O
.	O
</s>
