VIVOTEK
User's Manual - 61
■ Frame size
You can set up different video resolution for different viewing devices. For example, 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. Note that a larger frame size takes up more
bandwidth.
■ Maximum frame rate
This limits the maximum refresh frame rate per second. Set the frame rate higher for smoother
video quality.
If the power line frequency is set to 50Hz, the frame rates are selectable at 1fps, 2fps, 3fps, 5fps,
8fps, 10fps, 15fps, 20fps, and 25fps. If the power line frequency is set to 60Hz, the frame rates
are selectable at 1fps, 2fps, 3fps, 5fps, 8fps, 10fps, 15fps, 20fps, 25fps, and 30fps. You can also
select
Customize
and manually enter a value. The frame rate will decrease if you select a higher
resolution.
■ Video quality
The video quality can be adjusted to the following settings: Medium, Standard, Good, Detailed,
and Excellent. You can also select
Customize
and manually enter a value. Please refer to the
description in H.264 mode on the previous page for more details.
NOTE
► Video quality and fixed quality refer to the
compression rate
, so a lower 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
occurance, we suggest you customize a lower video resolution or reduce the frame rate to obtain
smooth video.
NOTE:
If
JPEG
mode is selected, the Network Camera continuously sends JPEG images to the client,
producing a moving effect similar to a filmstrip. Every single JPEG image transmitted guarantees
the same image quality, which in turn comes at the expense of variable bandwidth usage. Because
the media contents are a combination of JPEG images, no audio data is transmitted to the client.
There are three parameters provided in MJPEG mode to control the video performance:
