Panic Alarm Station Configuration Guide
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parameters.
Video Stream
The stream type of camera can be set as Main Stream or Sub Stream. By default, it is Main
Stream. The main stream is used for HD storage and preview; the sub stream is used for SD
storage and preview when the network bandwidth is insufficient.
Video Type
The video type can be set as Video or Video & Audio. By default, it is Video & Audio, where
video contains sound and images. If you don't need sound, choose Video Stream.
Bitrate Type
The bitrate type can be set as Constant or Variable. By default, it is Constant, where you should
select a constant value from the Bitrate drop-down box. You are supposed to select the
maximum bitrate when the bitrate type is set as Variable.
Video Quality
You are able to choose different level of the video quality. The video quality is not optional by
default when the bitrate type is Constant.
Resolution
According to the requirements for video clarity, the higher the resolution, the higher the
bandwidth requirement for the network.
Frame Rate
Video frames per second. According to the actual bandwidth setting, the higher the video frame
rate, the higher the required bandwidth and the higher the required storage space.
I Frame Interval
The number of frames between the two key frames before and after. The larger the I frame
interval is, the smaller the code stream fluctuation is, but the image quality is relatively poor.
Otherwise, the code stream fluctuation is larger and the image quality is higher. It is
recommended to use the default value.
Audio Encoding Type
When the stream type is the Main Stream, the audio encoding type can be set as G711_U, AAC
or PCM. And the audio encoding type of the sub stream is the same as the audio encoding type
set in the main stream.
Video Encoding Type
By default, it is STD_H264.
SVC
It is a scalable video coding technology. The SVC function can be used for framed video
recording to reduce storage space. The framed video file still supports normal decoding. When
the SVC function is selected to be On, both the storage device and the decoding device must be
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