ETV
S
y
s
t
e
m
Server Software - User’s
G
u
i
d
e
Page
55
MPEG4
CODEC
S
e
tt
i
n
g
s
To
switch the recording
CODEC
to M
P
E
G
4
,
s
e
l
e
c
t
the
MPEG4
option from the
CODEC
drop-down
m
e
nu
.
Key-frame Rates
S
e
t
s
the number of key-frames recorded per second.
The
higher the value, the greater the
d
a
t
a
space needed
for recording, but the higher the quality of the
v
i
d
e
o
.
M
o
t
i
o
n
S
e
ar
c
h
Scope
Changes
the
size
of the regions
used
to detect
m
o
t
i
o
n
.
Q
u
an
t
i
z
at
i
o
n
M
e
t
h
o
d
S
e
l
e
c
t
s
the type of compression.
H263
offers higher compression than
MPEG4
but requires
m
o
r
e
CPU
u
sa
g
e
.
ME
A
cc
u
r
ac
y
M
o
t
i
o
n
E
st
i
m
a
t
i
o
n
Accuracy includes two options:
Full Pixel and
Half
P
i
x
e
l
.
Full Pixel checks
f
o
r
motion comparing differences of full pixels. Half
Pixel will check
for motion
using an
i
n
t
e
r
p
o
l
a
t
i
o
n
method that
d
e
t
e
ct
s
finer m
o
v
e
m
e
n
t
s.
N
o
t
e
:
Half
Pixel is a CPU
intensive
se
tt
i
n
g
.
ME
Algorithm
The M
o
t
i
o
n
E
st
i
m
a
t
i
o
n
Algorithm
changes
the
shape
of the area
used
for motion detection
a
n
d
includes two options:
Full
Search
and Fast
Search.
Fast
Search
will save CPU
time but
Full
Search
i
s
more
accu
r
a
t
e
.
ME
V
e
c
t
o
r
s
S
e
t
s
the number of
v
e
c
t
o
r
s
tested for motion from
1
to 4.
The
greater the number, the more
CPU
processing
is
r
e
q
u
i
r
e
d
.
Hardware
CODEC
S
e
tt
i
n
g
s
Depending
on
the
DVR
model, it
may use
Hardware
CODEC
recording,
which has
slightly
d
i
ff
e
r
e
n
t
customization options.
For
some
types
of
cards the
CODEC used can be
changed
in
the
DVR
Settings
|
Hardware
Tab via
the Hardware
CODEC
Dropdown
b
o
x
.
Variable
Bit
Rate
The
default setting of Variable Bit
R
a
t
e
allows
the encoder to
change
its recording bit
r
a
t
e
automatically
as
required.
This
option offers the
best
co
m
b
i
n
a
t
i
o
n
of file
size and visual
q
u
a
li
t
y
.
C
o
n
s
t
an
t
Bit
R
at
e
Changes a
variable bit rate into
a
constant bit rate.
A
setting of
C
o
n
st
a
n
t
Bit
R
a
t
e
with
a
very
h
i
g
h
bit rate
se
l
e
c
t
e
d
will
provide the maximum
video
quality settings, although this
is
at the expense
o
f
storage
sp
a
ce
.
R
e
s
t
r
i
c
t
M
ax
i
mum
Bit
R
at
e
S
e
t
s
a
hard limit
on
the maximum quality that
can be
recorded.
Use
the
slide
bar to
s
e
l
e
c
t
t
h
e
desired maximum bit
r
a
t
e
.
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