<s>
In	O
video	O
production	O
,	O
a	O
software	B-General_Concept
vision	I-General_Concept
mixer	I-General_Concept
is	O
a	O
piece	O
of	O
software	O
which	O
is	O
able	O
to	O
switch	O
between	O
various	O
video	O
sources	O
.	O
</s>
<s>
In	O
contrast	O
to	O
a	O
hardware	O
vision	O
mixer	O
,	O
a	O
software	B-General_Concept
vision	I-General_Concept
mixer	I-General_Concept
allows	O
for	O
a	O
larger	O
number	O
of	O
channels	O
,	O
connection	O
types	O
,	O
and	O
transition	O
effects	O
,	O
and	O
allows	O
for	O
greater	O
flexibility	O
of	O
computer-based	O
content	B-Protocol
integration	I-Protocol
,	O
text	O
and	O
graphics	O
overlay	O
,	O
and	O
media	O
programming	O
.	O
</s>
<s>
Software	B-General_Concept
vision	I-General_Concept
mixers	I-General_Concept
are	O
generally	O
less	O
expensive	O
than	O
hardware	O
vision	O
mixers	O
.	O
</s>
