VIVOTEK IP8152 사용자 설명서

 

 

If 

 mode is selected, the Network Camera sends consecutive 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�

If the power line frequency is set to 50Hz, the frame rates are selectable at 1fps, 2fps, 3fps, 5fps, 

8fps, 10fps, 15fps, 20fps, and 25fps� If the power line frequency is set to 60Hz, the frame rates 

are selectable at 1fps, 2fps, 3fps, 5fps, 8fps, 10fps, 15fps, 20fps, 25fps, and 30fps� You can also 

select 

Customize and manually enter a value� The frame rate will decrease if you select a higher 

resolution�

■ 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�

•  Constant bit rate: A complex scene generally produces a larger file 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 firmware 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�