Vivotek IP7130 User Manual
Page 52
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52 - User's Manual
Video quality settings for stream 1 / stream 2
Advanced Mode
The Network Camera offers two choices of video compression standards for real-time viewing: MPEG-4
and MJPEG�
Click the items to display the detailed configuration settings. You can set up two seperate streams for the
Network Camera 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�
If
MPEG-4
mode is selected, the video is streamed via RTSP protocol. There are four parameters
provided in MPEG-4 mode which allow you to adjust the video performance:
■ Frame size
Select the video size. Note that a larger frame size takes up more bandwidth. The frame sizes are
selectable in the following resolutions: 176 x 144, 320 x 240, and 640 x 480.
■ 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�
■ Intra frame period
Determine how often to plant an I frame. The shorter the duration, 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.
■ Video quality
A complex scene generally produces a larger file size, meaning that higher bandwidth will be needed
for data transmission. Therefore, if
Constant bit rate is selected, the bandwidth utilization is fixed at
a selected level, resulting in mutable video quality performance. The bit rates are selectable at the
following rates: 20Kbps, 30Kbps, 40Kbps, 50Kbps, 64Kbps, 128Kbps, 256Kbps, 512Kbps, 768Kbps,
1Mbps, 2Mbps, 3Mbps, and 4Mbps. You can also select
Customize and manually enter a value�
On the other hand, if
Fixed quality is selected, all frames are transmitted with the same quality;
bandwidth utilization is therefore unpredictable. 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�