Vivotek FD8166 Bedienungsanleitung PDF herunterladen (Seite 53)

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User's Manual - 53

The frame rate will decrease if you select the higher resolution, such 1600x904 and 1920x1080.

■ 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 congurable 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, and 8Mbps. You can also select Customize and manually

enter a value. This bit rate restriction method is particularly useful when planning a

configuration consisting of numerous cameras where video streams can produce

high demands both on network bandwidth and storage space. For example, storing a

6Mbps stream for 24 hours requires a 63GB disk space.

The Network Camera will strive to deliver video streams within the bit rate limitation

you impose. If Frame Rate Priority is selected, the Network Camera will try

to maintain the frame rate per second performance, while image quality will be

compromised. If Image quality priority is preferred, the Network Camera will try to

maintain the image quality of each frame, while the frame rate per second will be

compromised.

• 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.

The image quality will then be determined by the compression rate. For example, a

lower quality means a higher compression rate. The higher the compression rate,

the higher the possibility of image distortion, etc. You can also select Customize and

manually enter a logical value from 0 to 51.

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Vivotek FD8166 Bedienungsanleitung Seite 53