Manual
VIVOTEK
User's Manual - 141  
URL Command Document for All SeriesFD8166
s<0~(m-1)>_h264_priority
policy 
framerate, 
imagequality 
framerate  4/4  The policy to apply when 
the target bit rate is not 
sufficient to satisfy current 
encoded conditions. 
“framerate” indicates 
frame rate first. 
“imagequality” indicates 
image quality first. 
s<0~(m-1)>_h264_ratecontro
lmode 
cbr, vbr  cbr  4/4  cbr, constant bitrate 
vbr, fix quality 
s<0~(m-1)>_h264_quant 1~5,99,100 3  4/4  Quality of video when 
choosing vbr in 
“ratecontrolmode”. 
99,100 is the customized 
manual input setting. 
1 = worst quality, 5 = best 
quality. 
s<0~(m-1)>_h264_qpercent 1~100  45  4/4  Set quality by percentage. 
1: Worst quality 
100: Best quality 
(s<0~(m-1)>_h264_quant = 
100) 
s<0~(m-1)>_h264_qvalue 0~51  29  4/4  Manual video quality level 
input. 
(s<0~(m-1)>_h264_quant = 
99) 
s<0~(m-1)>_h264_bitrate  1000~8000000 3000000  4/4  Set bit rate in bps when 
choosing cbr in 
“ratecontrolmode”. 
s<0~(m-1)>_ h264_
maxvbrbitrate
1000~4000000
0
40000000  4/4  Maximum vbr bitrate 
s<0~(m-1)>_h264_maxframe  1~25, 
26~30 (only for 
60Hz CMOS) 
15  1/4  Set maximum frame rate in 
fps (for h264). 
s<0~(m-1)>_h264_profile  0~2  1  1/4  Indicate H264 profiles 
0: baseline 
1: main profile 
2: high profile 










