Vivotek MD7530, 7530D manual = worst quality, 5 = best quality

VIVOTEK

			1 = worst quality, 5 = best quality.
mjpeg_qvalue	10~200	50	Manual video quality level input.
			(This must be present if
			mjpeg_quant is equal to 0)
mjpeg_maxframe	1~25,	15	Set maximum frame rate in fps
	26~30 (only for NTSC or		(for JPEG).
	60Hz CMOS)
mpeg4_intraperiod	250, 500, 1000, 2000, 3000,	1000	Intra frame period in
	4000		milliseconds.
mpeg4_ratecontrol	cbr, vbr	Vbr	cbr: constant bitrate
mode			vbr: fix quality
mpeg4_quant	0, 1~5	3	Quality of video when choosing
			vbr in “mpeg4_ratecontrolmode”.
			0 is the customized manual input
			setting.
			1 = worst quality, 5 = best quality.
mpeg4_qvalue	1~31	7	Manual video quality level input.
			(This must be present if
			mpeg4_quant is equal to 0)
mpeg4_bitrate	1000~8000000	512000	Set bit rate in bps when choosing
			cbr in “mpeg4_ratecontrolmode”.
mpeg4_maxframe	1~25,	10	Set maximum frame rate in fps
	26~30 (only for NTSC or		(for MPEG-4).
	60Hz CMOS)

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154 - User's Manual