Vivotek SF8172 user manual To its target bit rate

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s<0~(m-1)>_mpeg4_intrap	250, 500,	1000	4/4	Intra frame period in
eriod	1000, 2000,			milliseconds.
	3000, 4000
s<0~(m-1)>_mpeg4_bitrate	average,	average	4/4	“average” indicates the
restriction	upperbound			average bit rate will be equal
				to its target bit rate.
				“upperbound” indicates the
				bit rate will always not
				exceed its target bit rate.
s<0~(m-1)>_mpeg4_priorit	framerate,	framerate	4/4	The policy to apply when the
ypolicy	imagequality			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)>_mpeg4_rateco	cbr, vbr	vbr	4/4	cbr, constant bitrate
ntrolmode				vbr, fix quality
s<0~(m-1)>_mpeg4_quant	1~5	3	4/4	Quality of video when
	99, 100			choosing vbr in
				“ratecontrolmode”.
				99 is the customized manual
				input setting.
				1 = worst quality, 5 = best
				quality.
				100 is percentage mode.
s<0~(m-1)>_mpeg4_qvalue	2~31	7	4/4	Manual video quality level
				input.
				(s<0~(m-1)>_mpeg4_quan
				t = 99)
s<0~(m-1)>_mpeg4_qperce	1~100	29	4/4	Manual video quality level
nt				input.
				(s<0~(m-1)>_mpeg4_quan
				t = 100)
s<0~(m-1)>_mpeg4_bitrate	1000~160000	3000000	4/4	Set bit rate in bps when
	00			choosing cbr in
	<product			“ratecontrolmode”.
	dependent>
s<0~(m-1)>_mpeg4_maxfr	1~15	15	1/4	Set maximum frame rate in

162 - User's Manual