INS_CNVETX1_REV– 06/10/13 PAGE 119
INSTALLATION AND OPERATION MANUAL
CNVETX1
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MPEG-4 Parameters
Table 24: MPEG-4 Parameters
Parameter
Value/Range
Default
Description
rcmode
VBR, CBR,
CONSTANT_Q
Constant_Q Rate Control Mode. No affect currently. CBR only
ngop
1 – 100
30
Size of GOP (distance between keyframes)
const_bit rate
50000 -10000000
4000000
Constant Bit rate: Applicable only when rcmode =
CBR.
Avg_bit rate
50000 -10000000
200000
Average Bit rate: Applicable only when rcmode =
VBR.
Max_bit rate
50000 -10000000
300000
Maximal Bit rate: Applicable only when rcmode =
VBR.
Qinit
8 - 30
8
Initial Quantization: Relevant for rcmode = CBR or
CONSTANT_Q.
H.264 Parameters
Table 25: H.264 Parameters
Parameter
Value/Range
Default
Description
rcmode
VBR, CBR,
CONSTANT_Q
Constant_Q
Rate Control Mode. No affect currently. CBR only
ngop
1 – 100
30
Size of GOP (distance between keyframes)
const_bit rate
50000 -10000000
2000000
Constant Bit rate: Applicable only when rcmode =
CBR.
Avg_bit rate
50000 -10000000
2400000
Average Bit rate: Applicable only when rcmode =
VBR.
Max_bit rate
50000 -10000000
3000000
Maximal Bit rate: Applicable only when rcmode =
VBR.
Qmin
20 – 51
20
Minimum Quantization: Applicable only when
rcmode = CBR or VBR.
Qmax
25 – 51
51
Maximum Quantization: Applicable only when
rcmode = CBR or VBR.
Qinit
25 – 51
28
Initial Quantization: Relevant for rcmode = CBR or
CONSTANT_Q.