Instant Backup; Manual Snapshot; Two-Way Talk; Switch Bit Streams - Dahua NVR41-4KS2 Series User Manual

4.3.3.3 Instant Backup

You can record the video of any channel and save the clip into a USB storage device.
By clicking , the recording is started. To stop recording, click this icon again. The clip is
automatically saved into the connected USB storage device.
You can record the video of any channel and save the clip into a USB storage device.

4.3.3.4 Manual Snapshot

You can take one to five snapshots of the video and save into a USB storage device.
By clicking , you can take snapshots. The snapshots are automatically saved into the connected
USB storage device. You can view the snapshots on your PC.
To change the quantity of snapshots, select Main Menu > CAMERA > Encode > Snapshot, in the
Manual Snapshot list, select the snapshot quantity.

4.3.3.5 Two-way Talk

Background Information
You can perform the voice interaction between the Device and the remote device to improve
efficiency of emergency.
Procedure
Step 1 Click
talk buttons of digital channel become null too.
Step 2 Click

4.3.3.6 Switch Bit Streams

Via this function, you can switch the channel main stream/sub stream according to current network
bandwidth.
● M: Main stream. Its bit streams are big and definition is high. It occupies large network bandwidth
suitable for video wall surveillance, storage and etc.
● S: Sub stream. Its definition is low but occupies small network bandwidth. It is suitable for general
surveillance, remote connection and etc.
Click to switch the bit stream type of the main stream and sub stream.
● M: Main stream.
Figure 4-64
to start two-way talk function the icon now is shown as
again, you can cancel two-way talk.
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User's Manual
. Now the rest two-way