Cisco 8020 Reference Manual page 57

Chapter 5 Configuration
When completed with the settings in the Viewing Window, click Save to enable the settings and click
Close to exit the window. The selected Output Frame Size will immediately be applied to the Frame
size of each video stream. Then you can go back to the home page to test the e-PTZ function. For
more information about the e-PTZ function, see the
Click the stream item to display the detailed information. The maximum frame size will follow your
settings in the above Viewing Window sections.
This camera offers real-time H.265, H.264, and MJPEG compression standards (Triple Codec) for
real-time viewing. If the H.264 or H.265 mode is selected, the video is streamed via the RTSP protocol.
There are several parameters through which you can adjust the video performance:
Frame size—You can set up different video resolutions for different viewing devices. For example,
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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, or recording the stream to an NVR. A
larger frame size takes up more bandwidth.
Maximum frame rate—Limits the maximum refresh frame rate per second. Configure the frame rate
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higher for smoother video viewing and for recognizing moving objects in the field of view. If the
power line frequency is set to 50Hz, the frame rates are selectable at 1fps, 2fps, 3fps, 5fps, 8fps,
12fps, 10fps, 15fps, 20fps, 24fps, and 25fps. If the power line frequency is set to 60Hz, the frame
rates are selectable at 1fps, 2fps, 3fps, 5fps, 8fps, 10fps, 12fps, 15fps, 20fps, 24fps, 25fps, and 30fps.
You can also select Customize and manually enter a value.
The frame rate will decrease if you select a higher resolution.
Intra frame period—Determine how often for firmware to plant an I frame. The shorter the duration,
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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.
Smart Stream II
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Dynamic Intra frame period—High quality motion codecs, such as H.265, utilize the redundancies
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between video frames to deliver video streams at a balance of quality and bit rate.
The encoding parameters are summarized and illustrated in
self-referential and they are largest in size. The P-frames are predicted frames. The encoder refers
to the previous I- or P-frames for redundant image information.
Figure 5-3
By dynamically prolonging the intervals for I-frames insertion to up to 10 seconds, the bit rates
required for streaming a video can be tremendously reduced. When streaming a video of a static
scene, the Dynamic Intra frame feature can save up to 53% of bandwidth. The amount of bandwidth
thus saved is also determined by the activities in the field of view. If activities occur in the scene,
firmware automatically shortens the I-frame insertion intervals in order to maintain image quality.
In the low light or night conditions, the sizes of P-frames tend to be enlarged due to the noises, and
hence the bandwidth saving effect is also reduced.
H.264/H.265 Frame Types
Cisco Video Surveillance 8020/8030 IP Camera Reference Guide
"PTZ > PTZ settings" section on page
Figure 5-3. The I-frames are completely
Media > Video
5-30.
5-15