Cisco 8620, Справочное руководство

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Cisco Video Surveillance 8620/8630 IP Camera Reference Guide
Chapter 5 Configuration
Media > Audio
If the power line frequency is set to 60Hz, the frame rates are selectable at 1fps, 2fps, 3fps, 5fps,
8fps, 10fps, and up to 30fps. You can also select Customize and manually enter a value. The
frame rate will decrease if you select a higher resolution.
– Video quality—Refer to the previous page setting for an average or upper bound threshold for
controlling the bandwidth consumed for transmitting motion jpegs. The configuration method
is identical to that for H.264/5.
For Constant Bit Rate and other settings, see the explanations earlier in this section.
Note
Video quality and fixed quality refers to the compression rate, so a lower compression rate value
will produce higher quality.
Converting high-quality video may significantly increase the CPU loading, and you may
encounter streaming disconnection or video loss while capturing a complicated scene. In the
event of occurrence, we suggest you customize a lower video resolution or reduce the frame rate
to obtain smooth video.
Media > Audio
This section explains how to configure the audio options for the camera.
Audio Settings
• Mute—Select this option to disable audio transmission from the camera to all clients. If muted, no
audio data will be transmitted even if audio transmission is enabled on the Client Settings page. In
that case, this message is displayed: “The media type has been changed to video only because the
media from server contains no audio.”
•
Microphone source—If an external microphone is selected, you can select the audio input as the
external microphone.
• Internal microphone input gain—Select the gain of the internal audio input according to ambient
conditions. Adjust the gain from 0% to 100%.
•
External microphone input gain—Select the gain of the external audio input according to ambient
conditions. Adjust the gain from 0 to 100%.
•
Audio type—Select audio codec and the sampling bit rate.
–
G.711 also provides good sound quality and requires about 64Kbps. Select pcmu (u-Law) or
pcma (A-Law) mode.
– G.726 is a speech codec standard covering voice transmission at rates of 16, 24, 32, and
40kbit/s.
Audio Clips
–
Output gain: Use the slide bar to change the audio output gain value.
– Audio clip: When the camera's audio input is connected to a microphone, you can record a short
period of audio (1 to 10 seconds). You can also use the camera's embedded microphone to record
an audio clip, if available. Because the memory space is limited, a recording count down will