Filter
Top Products
VIVOTEK
User's Manual - 57
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:
Target bit rate:
A complex scene generally produces a larger le size, meaning that higher bandwidth
will be needed for data transmission� To regulate the bandwidth consumption and
storage space for recording videos, you can select the Constant bit rate methodology�
The rmware will try its best to contain the size of video packets within the limitation
of a constant bit rate� This methodoloy enables easier calculation of the network
bandwidth and storage space required for live viewing or video recording�
Policy:
- Frame rate priority - Firmware will try to maintain the target frame rate per second,
while the image quality will more or less be compromised�
- Image quality priority - Firmware will try to maintain the quality of the video while the
frame rate (no� of frames per second) may decrease�
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�
• Fixed quality: On the other hand, if Fixed quality is selected, all frames are
transmitted with the same quality; bandwidth utilization is therefore unpredictable�
When so congured, the frame-rate-per-second performance can be compromised
in the event of insufficient bandwidth or network clogs� The video quality can be
adjusted to the following settings: Medium, Standard, Good, Detailed, and Excellent.
You can also select Customize and enter a number to designate image quality� The
larger the number, the higher the compression rate, and hence image quality is lower�
A small customized quality number means a low compression rate, and a high quality
image�
- Maximum bit rate - While you want to ensure a reasonable image quality, you can
still impose an upper threshold on the bandwidth taken for the video transmission�
The congurable bit rate ranges from 1mbps to 40mbps.