Vivotek IP8332-C User Manual download pdf (Page 67)

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User's Manual - 67

■ 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

A complex scene generally produces a larger le size, meaning that higher bandwidth will be needed

for data transmission. Therefore, if Constant bit rate is selected, the bandwidth utilization is xed at

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, 1.5Mbps, 2Mbps, 3Mbps, 4Mbps, 6Mbps, and 8Mbps. You can also select Customize and

manually enter a value.

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.

If JPEG mode is selected, the Network Camera continuously sends JPEG images to the client, producing

a moving effect similar to a filmstrip. Every single JPEG image transmitted guarantees the same

image quality, which in turn comes at the expense of variable bandwidth usage. Because the media

contents are a combination of JPEG images, no audio data is transmitted to the client. There are three

parameters provided in MJPEG mode to control the video performance:

■ Frame size

You can set up different video resolution for different viewing devices. For example, set a smaller

frame size and lower bit rate for remote viewing on mobile phones and a larger video size and a higher

bit rate for live viewing on web browsers. Note that a larger frame size takes up more bandwidth.

■ Maximum frame rate

This limits the maximum refresh frame rate per second. Set the frame rate higher for smoother video

quality.

■ Video quality

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.

NOTE

►

Video quality and fixed quality refers to the compression rate, so a lower value will produce higher

quality.

►

Converting high-quality video may significantly increase the CPU loading, and you may encounter

streaming disconnection or video loss while capturing a complicated scene. In the above does occur, we

suggest you customize a lower video resolution or reduce the frame rate to obtain smooth video.

NOTE:

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Vivotek IP8332-C User Manual Page 67