Milestone XProtect Smart Client 2013 - Manual (Page 62)

Milestone XProtect ® Smart Client
2014
User's Manual
www.milestonesys.com 62 Defining your views
Name Description
Video buffering
This part of the Properties pane may not be visible. To view it, go
to the Options window's (see "XProtect Smart Client options" on
page 95) Functions tab, and ensure that Setup > Edit video
buffering is set to Available.
If you require very smooth display of live video, without any jitter, it
is possible to build up a video buffer.
If possible, avoid using video buffering. Video buffering can
significantly increase memory usage for each camera displayed in a
view. If you do need to use video buffering, keep the buffering level
as low as possible.
When live video is stored in a buffer, it will display smoothly without
any jitter, but the building up of the buffer will lead to a small delay
in the display of live video. Such a delay is often not a problem for
the person viewing the video. However, the delay may become very
evident if the camera is a pan-tilt-zoom (PTZ) camera, and
especially if you use a joystick to operate the camera.
Being able to control the amount of video buffering lets you decide
whether you want to prioritize smoothly displayed live video
(requires buffering and leads to a small delay) or instant PTZ and
joystick operation (requires no buffer, but may
—due to the lack of a
buffer —lead to a slight jitter in live video).
To use video buffering, select Use default video buffer, then
select the required buffer, from 2 frames to 2 seconds.
Apply to All
The Apply to All button lets you quickly apply the camera settings
for the selected camera to all cameras in the view.
About frame rate effect
The effect of the Frame Rate selection can be illustrated as follows:
Effect Unlimited Medium Low
JPEG Send all frames Send every 4th frame Send every 20th frame
MPEG (I-frame)
H.264
Send all frames Send all frames Send all frames
MPEG (P-frame)
H.264
Send all frames
Do not send any frames
Do not send all frames
Do not send any frames
Do not send all frames
Example: If you set the Frame rate option to Low in your XProtect Smart Client , and your
surveillance system administrator has configured the camera to feed JPEG images at a frame rate of
20 frames per second, you will experience an average of 1 frame per second when viewing video from
the camera. If your administrator had configured the camera with a feed as low as 4 frames per
second, you would, with Frame rate set to Low in your XProtect Smart Client, experience an average
of 0,2 frames per second when viewing video from the camera.