User Manual

Network Video Recorder User Manual
UM NVR v4.xx 111717NA 70
When the quota capacity is set to 0 , all cameras will use the total capacity of the
HDD for record and picture capture.
Reboot the device to activate the new storage mode settings.
8.3 Recording Parameters
8.3.1 Main Stream
Main Stream refers to the primary stream that affects data recorded to the hard disk
drive and will directly determine your recording quality and image size.
Compared to the sub-stream, the main stream can provide higher quality video with
higher resolution and frame rate.
Step 1 Frame Rate (FPS – Frames Per Second): Refers to how many frames are
captured each second. A higher frame rate is advantageous when there is
movement in the video stream, as it maintains image quality throughout.
Step 2 Resolution: Image resolution is a measure of how much detail a digital image
can hold: the greater the resolution, the greater the level of detail. Resolution
can be specified as the number of pixel-columns (width) by the number of
pixel-rows (height), e.g., 1024 × 768.
Step 3 Bitrate: The bit rate (in kbit/s or Mbit/s) is often referred to as speed, but
actually defines the number of bits/time unit and not distance/time unit.
Step 4 Enable H.264+ Mode: The H.264+ mode helps to ensure high video quality with a
lowered bitrate. It effectively reduces the need of bandwith and HDD storage
space.
A higher resolution, frame rate, and bitrate setting will provide better video quality,
but will also require more Internet bandwidth and use more hard disk drive storage
space.
8.3.2 Sub-Stream
The sub-stream is a second codec that runs alongside the main stream. It reduces the
outgoing Internet bandwidth without sacrificing the direct recording quality.
The sub-stream is often exclusively used by smartphone applications to view live
video. Users with limited Internet speeds benefit most from this setting.