User's Manual

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41
narrow, and bit rate is large, that will lead to video can not play well.
Frame rate: Note that a larger frame size takes up more bandwidth. When the video format is
50Hz, the maximum frame rate is 25 fps. When the video format is 60Hz, the maximum frame
rate is 30 fps. You should lower frame rate when the bandwidth is limited. Normally, when the
frame rate above 15, you can achieve fluently video.
Key Frame Interval: The time between last key frame and next key frame. The shorter the
duration, the more likely you will get a better video quality, but at the cost of higher network
bandwidth consumption.
3.4.2 On Screen Display
This page is used to add timestamp and device name on the video.
Figure 3.38
Display Timestamp: There are two options: Yes or NO. Select Yes and you can see the system
date on the video.
Display Camera name: There are two options: Yes or NO. Select Yes and you can see the
device name on the video.
Allow On Screen Display mask: There are two options: Yes or NO. Select yes and draw a
mask area on the video, the mask area will be black on the video.