Vivotek 9520 User Manual download pdf (Page 22)

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Audio and Video

This product supports dual-stream. It provides two settings for video streams, but only

one setting for audio.

Video Settings

Video title: The text string can be displayed on video

Color: Select either color or monochrome video display.

Power line frequency: The fluorescent light will flash according to the power line

frequency that depends on local utility. Change the frequency setting to eliminate

uncomfortable flash image when the light source is only fluorescent light.

Video orientation

Flip: Vertically rotate the video.

Mirror: Horizontally rotate the video. Check both options if the Network Camera is

installed upside down.

White balance: Adjust the value for best color temperature.

Maximum Exposure Time: Adjust the maximum exposure time in different

environments.

Overlay title and time stamp on video: When checked, the title is shown on video.

Note: There are different video quality settings for stream1 and stream2.

Mode: It can be MPEG-4 or JPEG. If MPEG-4 is selected, it is streamed in RTSP protocol.

If JPEG is selected, it is streamed in server push mode.

Frame Size: For both MPEG-4 and JPEG, there are three options: 176x144, 320x240,

and 640x480.

There are three dependent parameters provided in MPEG-4 mode for video

performance adjustment:

Intra frame period: The interval of intra frame.

Max frame rate: This limits the maximal refresh frame rate, which can be combined

with the video quality to optimize bandwidth utilization and video quality. Choose

“Constant bit rate.” If the user wants to fix the bandwidth utilization regardless of the

video quality, choose “Fixed quality” and select the desired bandwidth. The video

quality may be poor due to the sending of maximal frame rate within the limited

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Vivotek 9520 User Manual Page 22