VIVOTEK
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:
•Bit rate restriction: You can select either the Average or Upper bound method as a limiting factor. The Average method allows the bit rate consumed to fluctuate around the target bit rate, e.g., slightly higher or lower than 6Mbps. The Average method can apply when regulating the storage space taken when recording a video feed. The Upper bound method places a limitation on the maximum bit rate, and can be used to regulate the network bandwidth taken by a video stream.
•Target 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 configurable 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, and 16Mbps. You can also select Customize and manually enter a value.
•Policy: When bandwidth and storage space become an issue, there will always be a compromise between image quality and frame rate per second. It is users’ responsibility for an adequate bandwidth planning before they deploy network cameras. The policy here helps users with the initial network planning.
1.Frame rate priority - The camera will try to deliver a video stream with an optimal frame rate, e.g., 30fps, while image quality can be compromised. For example, users may prefer frame rate over quality where dropped frames are not preferred such as monitoring the consecutive actions in a manufacturing facility.
2.Image quality priority - The camera will try to deliver images in its highest quality while the number of frames per second can be compromised.
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