LT Security LTN7732-P8 Platinum Web Guide - Manual (Page 15)

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The default “Stream Type” is “Sub Stream”. It should only be changed
to “Main Stream” if the computer is on the local network. It uses
much more bandwidth.
The “Protocol” is “TCP” by default. Changing it to “UDP” can have a
slight performance increase on a stable network, but only if both UDP
and TCP ports have been forwarded. It often is unnoticeable.
The “Auto Start Live View” makes the cameras load without clicking
the “Start All Live View” button. The “Resume Live View Status” only
restores the number of cameras shown (1x1, 2x2, 3x3, or 4x4).
Camera Names
Configuration > Camera Setup > Display Settings
Video Quality
Configuration > Camera Settings > Video Settings
Each NVR has a different amount of bandwidth. Typically, the cameras
will automatically configure themselves. They can be optimized to
conserver HDD space and bandwidth. They can also be optimized for
quality, sacrificing space, bandwidth, and possibly channels. Each
resolution, frame rate, and quality has a different recommended max
bitrate (recommendations are on the NVR itself).
Substream is a low resolution video feed that is not recorded (thus,
does not affect HDD space). Because lower resolution can use less
bandwidth, substream is used to view multiple cameras feeds at once.
Substream Defaults & Possible Optimization
Video quality is a full topic on its own. For mainstream, 4096 Kpbs for
2.1 or 3 MP, with medium quality and real-time, is recommended.