Video - Foscam FI9821W User Manual

4.4 Video

This section allows you to configure Video stream settings, On screen display and Snapshot settings.
4.4.1 Video Settings
There are two ways to set the stream video settings. They are main stream video settings and sub stream
video settings.
Stream type: There are four types to identify different streams you have set.
Resolution: The camera supports four types: 720P, VGA(640*480), VGA(640*360), QVGA(320*340),
QVGA(320*180). The higher the resolution is, the clearer video will become. But the code flux will become
larger too, and it will take up more bandwidth.
Bit rate: Generally speaking, the larger the bit rate is, the clearer video will become. But the bit rate
configuration should combine well with the network bandwidth. When the bandwidth is very 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.
Foscam Digital Technologies
Telephone: 1-800-930-0949
Figure 4.49
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