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For H.264 major stream, the resolution of V6812IR-H01 series comes to
1280
×
960 and 1280
×
720; while the resolution of V6812IR-H00 series comes to
1280
×
720.
For H.264 minor stream, the resolution comes to 640
×
480, 320
×
240 and closed.
The resolution of MJPEG stream will be the same as that of major stream.
Frame Rate:
the number of compressed frames produced by camera per
second.
The bigger the frame is, the better the image continuity will be, but the CPU
performance is lowered.
The smaller the frame is, the worse the image continuity will be, but the CPU
could handle more events.
The maximum frame rate for H.264 is 30fps. The maximum frame rate for
MJPEG is 5fps.
GOV number:
GOV number means the ratio of I frame to P frame in
compressed video images.
The bigger the value is, the less the data quantity is and the less network
resource occupancy.
Max. GOV number can be set to 60.
Bit Rate Control:
There are 2 modes: variable rate (vbr) and constant rate
(cbr).
The variable rate can adjust the bandwidth that it occupies automatically
according to the complexity of image, because the complexity of real video
sequence keeps changing, details, speed, etc, and the variable rate setting mode
can be used to choose how much bandwidth should be used. If the video gets
more details and moving fast, then it takes up more bandwidth to transmit, and
reversely it occupies less bandwidth. When the setting goes with constant bit
rate, then the image is transmitted under a constant bandwidth.
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Bit Rate:
You have to set the upper limit of bit rate if “vbr” is selected; the
stream size will be fixed if “cbr” is selected and the stream size is defined in the
“Bit Rate”. For major stream, the bit rate can be 256~10000kbps; for minor
stream, the bit rate can be 256~ 2000Kbps.
Image Quality
: it can be set under MJPEG stream. Options: Highest, High,
Average, Low and Lowest. The higher the image quality is, the more bandwidth
it will occupy.
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4.5.2 OSD
Figure 4-23
OSD settings include: Text OSD and Date OSD.
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Set text display to “On” and you can set the text content and display position of
text and date OSD.
Context:
6 text OSDs are available. Enter the text content in the box of Context,
which allows up to 42 characters (lower/upper case letters and 0~9).
X-axis &Y-axis: the title axis location. Both X-axis and Y-axis can be any of
whole numbers from 0 to 99.
Font Size: set the font size to be displayed. The bigger the value is, the larger
the font size is.
Mode: OSD mode is optional with black and reverse. The OSD characters
feature with black fringe under black mode. While in reverse mode, the color of
OSD characters varies according to the background brightness. For example,
when the background is white, the OSD color will be black; and when the
background is black, the OSD color will be white.
After all settings finished, click “Save” button to display OSD on the video.
To cancel OSD display, set it to “OFF” and then click the button “Save”.
