38
1280
×
720, and closed optional.
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.
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.
