<s>
Avid	O
Xpress	B-Operating_System
Pro	I-Operating_System
was	O
a	O
non-linear	O
video	O
editing	O
software	O
aimed	O
at	O
professionals	O
in	O
the	O
TV	O
and	O
movie	O
industry	O
.	O
</s>
<s>
It	O
was	O
available	O
for	O
Microsoft	B-Application
Windows	I-Application
PCs	O
and	O
Apple	B-Device
Macintosh	I-Device
computers	I-Device
.	O
</s>
<s>
Xpress	B-Operating_System
Pro	I-Operating_System
included	O
many	O
of	O
the	O
high-end	O
editing	O
features	O
offered	O
by	O
other	O
Avid	O
editing	O
systems	O
,	O
and	O
was	O
closely	O
based	O
on	O
Avid	O
's	O
Media	B-Operating_System
Composer	I-Operating_System
systems	O
.	O
</s>
<s>
In	O
conjunction	O
with	O
the	B-Operating_System
Avid	I-Operating_System
Mojo	O
hardware	O
,	O
it	O
provided	O
real-time	O
uncompressed	O
video	O
editing	O
at	O
a	O
professional	O
level	O
.	O
</s>
<s>
Xpress	B-Operating_System
Pro	I-Operating_System
was	O
capable	O
of	O
sharing	O
media	O
files	O
with	O
Avid	O
's	O
advanced	O
Media	B-Operating_System
Composer	I-Operating_System
editing	O
systems	O
making	O
it	O
a	O
capable	O
logging	O
or	O
offline	O
editing	O
system	O
for	O
larger	O
projects	O
.	O
</s>
<s>
While	O
Xpress	B-Operating_System
Pro	I-Operating_System
was	O
originally	O
aimed	O
at	O
DV	O
and	O
uncompressed	O
standard	O
definition	O
editors	O
,	O
the	O
upgrade	O
to	O
Xpress	B-Operating_System
Pro	I-Operating_System
HD	I-Operating_System
with	O
version	O
5.0	O
of	O
the	O
software	O
added	O
support	O
for	O
high-definition	O
editing	O
with	O
the	O
8-bit	O
version	O
of	O
Avid	O
's	O
DNxHD	O
codec	O
or	O
Panasonic	O
's	O
DVCPRO	O
HD	O
codec	O
,	O
and	O
version	O
5.2	O
added	O
support	O
for	O
HDV	O
editing	O
.	O
</s>
<s>
Unlike	O
some	O
other	O
editing	O
packages	O
,	O
Xpress	B-Operating_System
Pro	I-Operating_System
HD	I-Operating_System
edits	O
HDV	O
natively	O
by	O
decompressing	O
the	O
MPEG-2	O
stream	O
on	O
the	O
fly	O
,	O
rather	O
than	O
transcoding	O
into	O
an	O
intraframe	O
codec	O
.	O
</s>
<s>
Xpress	B-Operating_System
Pro	I-Operating_System
was	O
discontinued	O
on	O
March	O
17	O
,	O
2008	O
,	O
and	O
was	O
no	O
longer	O
for	O
sale	O
after	O
June	O
30	O
,	O
2008	O
.	O
</s>
<s>
Avid	O
offered	O
Xpress	B-Operating_System
Pro	I-Operating_System
users	O
a	O
discounted	O
upgrade	O
price	O
for	O
their	O
flagship	O
non-linear	O
editing	O
software	O
Media	B-Operating_System
Composer	I-Operating_System
.	O
</s>
<s>
One	O
of	O
the	O
controversial	O
aspects	O
of	O
the	O
software	O
was	O
that	O
it	O
did	O
not	O
work	O
on	O
Microsoft	O
's	O
Windows	B-Application
Vista	I-Application
.	O
</s>
