44
Multicast
IP
Multicast
Port
IP
address
and
port
number
of
the
multicast
group
of
virtual
channels
Note:
The
multicast
IP
address
is
valid
only
when
the
device
supports
multicast.
In
addition,
the
group
of
information
about
the
multicast
IP
address
and
the
multicast
port
number
must
be
unique
on
the
entire
network.
4
PTZ
Control
PTZ
control
allows
you
to
remotely
control
the
speed,
direction,
iris,
focus,
wiper
switch,
and
zoom
of
the
PTZ,
and
lock
the
PTZ.
The
device
also
supports
other
functions,
including
automatic
unlocking/releasing
of
the
PTZ,
setting
a
preset
position
of
the
PTZ,
and
PTZ
patrol.
NOTE
！
PTZ
control
is
applicable
to
PTZ
cameras
only,
and
the
actual
PTZ
control
operations
available
for
a
PTZ
camera
depend
on
the
functions
of
the
PTZ
camera
and
the
PTZ
protocol
that
the
PTZ
camera
supports.
For
example,
some
vendors
use
some
preset
positions
of
the
PTZ
for
other
functions
(such
as
the
wiper
switch
or
menus)
instead
of
as
PTZ
preset
positions.
Therefore,
you
need
to
refer
to
the
specification
description
of
the
PTZ
before
using
it.
Controlling
a
PTZ
Camera
Through
the
PTZ
Toolbar
NOTE
！
In
terms
of
the
preemption
policy
for
a
PTZ
camera,
users
with
a
higher
priority
can
preempt
the
PTZ
camera
whereas
users
with
the
same
priority
cannot
preempt
the
PTZ
camera.
For
details
about
priorities,
refer
to
Adding
a
User
.
Steps
Screenshot
1.
In
the
preview
interface,
select
the
preview
pane
of
a
camera,
and
click
the
PTZ
control
icon
on
the
toolbar.
The
PTZ
Control
interface
is
displayed.
