Vivotek IP7251 User Manual
Page 78
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78 - User's Manual
support), 1(support)
Bit 4
=> Support
zoom operation. 0(not
support), 1(support)
Bit 5 => Support focus
operation. 0(not
support), 1(support)
text
string[16]
1/4
enclosed caption
imprinttimestamp
0
4/4
Overlay time stamp on
video
maxexposure
1~120
5
4/4
Maximum exposure time
s<0~(m-1)>_codectype
mpeg4,
mjpeg
mpeg4
4/4
video codec type
s<0~(m-1)>_resolution
VGA CMOS
=>
176x144,
320x240,
640x480
CMOS
=>
640x480
4/4
Video resolution in pixel
s<0~(m-1)>_mpeg4_intraperiod
250, 500,
1000, 2000,
3000, 4000
1000
4/4
The period of intra frame
in milliseconds
s<0~(m-1)>_mpeg4_ratecontrol
mode
cbr, vbr
vbr
4/4
cbr, constant bitrate
vbr, fix quality
s<0~(m-1)>_mpeg4_quant
1, 2, 3, 4, 5
3
4/4
quality of video when
choosing vbr in
“ratecontrolmode”. 1 is
worst quality and 5 is
the best quality.
s<0~(m-1)>_mpeg4_bitrate
20000,
30000,
40000,
50000,
64000,
128000,
256000,
512000,
768000,
512000
4/4
set bit rate in bps when
choose cbr in
“ratecontrolmode”