<s>
Variable	B-General_Concept
frame	I-General_Concept
rate	I-General_Concept
(	O
or	O
VFR	O
)	O
is	O
a	O
term	O
in	O
video	O
compression	O
for	O
a	O
feature	O
supported	O
by	O
some	O
container	O
formats	O
which	O
allows	O
for	O
the	O
frame	O
rate	O
to	O
change	O
actively	O
during	O
video	O
playback	O
,	O
or	O
to	O
drop	O
the	O
idea	O
of	O
frame	O
rate	O
completely	O
and	O
set	O
an	O
individual	O
timecode	O
for	O
each	O
frame	O
.	O
</s>
<s>
In	O
video	O
recording	O
,	O
a	O
lowered	O
framerate	O
may	O
be	O
preferred	O
in	O
darker	O
environments	O
to	O
extend	O
the	O
exposure	O
time	O
per	O
frame	O
,	O
allowing	O
the	O
image	B-Algorithm
sensor	I-Algorithm
to	O
capture	O
more	O
light	O
,	O
which	O
results	O
in	O
brighter	O
footage	O
.	O
</s>
