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Note: If the function is abnormal, check if the selected certificate is abnormal in Certificate
Management.
5.4 Video/Audio
Video Settings
Stream type
Main Stream:The stream stands for the best stream performance the device supports. It usually
offers the best resolution and frame rate the device can do. But high resolution and frame rate
usually means larger storage space and higher bandwidth requirements in transmission.
Sub Stream: The stream usually comparatively low resolution options, which consumes less
bandwidth and storage space.
Other Streams:Steams other than the main stream and sub stream may also be offered for
customized usage.
Video Type: Select the stream type to video stream, or video & audio composite stream. The
audio signal will be recorded only when the Video Type is Video & Audio.
Resolution: Select the resolution of the video output. Select video resolution according to actual
needs. Higher resolution requires higher bandwidth and storage.
Bit rate Type: Select the bit rate type to constant or variable.
Constant Bit rate: It means that the stream is compressed and transmitted at a comparatively
fixes bit rate. The compression speed is fast, but mosaic may occur on the image.
Variable Bit rate: It means that the device automatically adjust the bit rate under the set Max.
Bit rate. The compression speed is slower than that of the constant bit rate. But it guarantees
the image quality of complex scenes.
Video Quality: When bit rate type is selected as Variable, 6 levels of video quality are
selectable.Select a video quality according to actual needs. Note that higher video quality
requires higher bandwidth.
Frame Rate: Set the frame rate. The frame rate is to describe the frequency at which the video
stream is updated and it is measured by frames per second (fps). A higher frame rate is
advantageous when there is movement in the video stream. Note that higher frame rate requires
higher bandwidth and larger storage space.
Max. Bitrate: Set the maximum bitrate to 32 to 16384 Kbps. The higher value corresponds to the
higher video quality, but the higher bandwidth is required.
Note: The limit of the maximum bitrate value varies according to different camera platforms. For
some certain cameras, the maximum limit is 8192 Kbps or 12288 Kbps.
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