Overview
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Rate
：
Can be set. When select VBR, if compress dramatic movement videos,
it needs to set an upper limit. Stream rate is the limit value, and the scope
is 32Kbps-8192Kbps. The bit rate setting is proportional to the resolution, if higher
resolution, the set value of bit rate should be higher. For CIF, typically set as 384K-
768Kbps; 2CIF, 512K-1Mbps; 4CIF, 768K-2Mbps. Concrete bit rate should be adjusted
according to cameras position.
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Resolution
：
VGA, 4CIF, 720P, 960P are optional. Higher resolution and
clearer image.
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N/P Mode
：
NTSC or PAL
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I Frame Rate: It is the key frame. The video frame is composed by key frames
and non-key frames. I frame rate refers to the number of video frames in the data
stream includes an I-frame. If I frame rate is 100, means there is a I frame every 100
frames. I frame the frame rate and bit rate is inversely proportional, larger I frame
and smaller bit rate. It is advised that
I-frame rate setting value is four times of frame rate.
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Encode Mode
：
VBR(Variable Bit Rate) or CBR(Constant Bit Rate)
The BVR means when compression video signal, it can change bit rate
according to the video source. For example: decrease compression rate for stable image,
otherwise, raise it. Thus, it can save the hard disk space and enhance bandwidth
utilization. The main features of VBR are video quality unchanged and compressed
stream adjusted according to video source. Given bit rate means that no matter what
happens to the video source, video share hard disk space and The CBR means the
compression bit rate is unchanged, and it can accurate estimate the
hard disks space and bandwidth occupied by recordings.
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Video Encoder
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Support H.264 and Motion JPEG
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Play Impression
：
Low Delay and Fluent
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Extended Code
：
Support H.264 baseline, main profile and high profile
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