Texas Instruments H.264 High Profile Encoder, User Manual

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API Reference
4-54
IVIDENC2_Params::rateControlPreset
is equal to
IVIDEO_STORAGE
and
IVIDENC2_Params::encodingPreset
is equal
to
IVIDEO_USER_DEFINED
and
rateControlParamsPreset
is equal
to
“1”
In VBR rate control algorithm, with a scene change the frame having
scene change will follow qpMaxI and qpMinI irrespective of frame type
The following parameters are ignored during run-time:

rcAlgo

CbQPIndexOffset

CrQPIndexOffset

initialBufferLevel

enablePRC

frameSkipAfterSceneChange

scalingMatrixPreset
4.2.3.3 IH264HPVENC_InterCodingParams
║ Description
This structure contains all the parameters which controls inter MBs coding behavior. For the default
and supported values, see
Table 4-8 .
║ Fields
Field Data Type Input/
Output Description
interCodingPr
eset XDAS_Int32
Input This preset controls the
USER_DEFINED
versus
DEFAULT
mode. If you are not aware about the
fields, it should be set as
IH264HP_INTERCODING_DEFAULT
MvRangeHorP XDAS_Int32
Input Horizontal motion vector range for P frames
Possible values: 16 to 496
MvRangeVerP XDAS_Int32
Input Vertical motion vector range for P frames
Possible Values: 16 to 496. If it exceeds the level
limit value, it is clipped to the max vertical MV
range as per level limit.
MvRangeHorB XDAS_Int32
Input Horizontal motion vector range for B frames
Possible values: 16 to 496
MvRangeVerB XDAS_Int32
Input Vertical motion vector range for B frames.
Possible values: 16 to 496. If it exceeds the level
limit value, it is clipped to the max vertical MV
range as per level limit.
maxMVperMB XDAS_Int32
Input Defines the maximum MV per macroblock. 1 and 4
are valid inputs.