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VIVOTEK
User's Manual - 59
The frame rate will decrease if you select a higher resolution.
■ Intra frame period
Determine how often to plant an I frame. The shorter the duration, the more likely you will get
better video quality, but at the cost of higher network bandwidth consumption. Select the intra
frame period from the following durations: 1/4 second, 1/2 second, 1 second, 2 seconds, 3
seconds, and 4 seconds.
■
Video quality
Constant bit rate:
• Constant bit rate: A complex scene generally produces a larger file size, meaning
that higher bandwidth will be needed for data transmission. The bandwidth
utilization is congurable to match a selected level, resulting in mutable video quality
performance. The bit rates are selectable at the following rates: 20Kbps, 30Kbps,
40Kbps, 50Kbps, 64Kbps, 128Kbps, 256Kbps, 512Kbps, 768Kbps, 1Mbps, 2Mbps,
3Mbps, 4Mbps, 6Mbps, 8Mbps, 10Mbps, 12Mbps, 14Mbps, 16Mbps, 18Mbps, and
20Mbps. You can also select Customize and manually enter a value.
You should speciy the bit rate setting either as an Average restriction or as an Upper
bound threshold. If set to the Average, video bit rate will uctuate around the Target
bit rate setting.
• Fixed quality: On the other hand, if Fixed quality is selected, all frames are
transmitted with the same quality; bandwidth utilization is therefore unpredictable.
The video quality can be adjusted to the following settings: Medium, Standard, Good,
Detailed, and Excellent. You can also select Customize and manually enter a value.