Network Video Recorder User Manual
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5.4.3 Configure Recording Parameter
Steps
1. Go to Configuration → Record → Parameter.
2. Configure recording parameters.
Main Stream
Main stream refers to the primary stream that affects data recorded to the hard disk drive
and will directly determine your video quality and image size. Comparing with the sub-
stream, the main stream provides a higher quality video with higher resolution and frame
rate.
Sub-Stream
Sub-stream is a second codec that runs alongside the mainstream. It allows you to reduce the
outgoing internet bandwidth without sacrificing your direct recording quality. Sub-stream is
often exclusively used by smartphone applications to view live video. Users with limited
internet speeds may benefit most from this setting.
Frame Rate
Frame rate 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.
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.
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.
Note
Higher resolution, frame rate, and bitrate provide you better video quality, but it also requires
more internet bandwidth and uses more storage space on the hard disk drive.
3. Click Apply.
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