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RTSP Path -
The RTSP Path is the stream ID used for RTSP client streaming connection, such as VLC
player. The default values are
v00
,
v01
and
v02
for the three streams respectively. The string
can be any combination of number or capital/small letters. It cannot be empty however.
Resolution -
The resolution here describes an image size counted by width and height, e.g. 640x480,
referring to
pixel resolution
. The 1
st
stream can be set from more options of resolution;
1600x1200 (2 megapixels), 1280x720(HD), 800x600(SVGA), 640x480(VGA),
320x240(QVGA). While Stream2 has the options of VGA and QVGA, stream3 is in a fixed
resolution, the QVGA.
Video Mode -
This option allows the selection of two bit rate modes, the
Constant Bit Rate (CBR)
or
Variable Bit Rate (VBR).
CBR refers to the setting of a fixed
Target Bit Rate
(configuration in
the rage of 64Kbps to 6Mbps) that would apply in the case of limited bandwidth or/and storage
requirement. While CBR concerns a fixed data rate transmitting, the video quality is of high
priority for VBR mode selected. VBR therefore is configured with the
Quality Level
(Standard,
Good, Best). In general, CBR predicts the provided condition; if image activity requires higher
bit rates than configured, the frame rate and quality would be affected as not likely to increase
bandwidth (bit rate). In spite of the required recording storage estimation, VBR is by way of
compensation that adjustable bit rate fits the actual image activity.
Image Format -
H.264 and MJPEG are available for image format
selection. The term, “image format”, is
referring to compression / encoding technique. The selection of image format decides the
performance of bandwidth and storage requirement. In the request of same video quality,
H.264 contributes to less bandwidth and storage requirement, which is more efficient than
MJPEG.
GOP -
In H.264 video coding, GOP (group of pictures) describes how the different types of frames are
arranged. The frame types implemented here are
I
-frame (full image information) and
P
-frame
(motion-compensated difference information). This setting configures the
GOP length
which is
the number of frames before next I-frame appears. Having more I-frames usually increases
the stream size, and therefore more bandwidth and storage are required.
Frame Rates -
The Frame Rates defines the number of frames that will be displayed per second. The frame
Summary of Contents for ND614E
Page 1: ...User s Manual H 264 Series 2 Megapixel Network Camera ND614E Version 1 3 Date 12 26 2011 ...
Page 5: ...5 Installation 1 Hardware ...
Page 33: ...33 ...
Page 42: ...42 ...
