2. GOPStructureand ¶

2.1. GOPMode Table¶

Mode	Description
NormalP	P beforeRefer tobefore Refer to
SmartP	P beforeRefer tobefore Refer to ，VI beforeRefer toIDR

2.2. NormalPMode Structure Description¶

2.2.1. NormalPMode Structure Description¶

NormalP（ is IPPP  ） in 、 Commonof GOP（Group of Pictures）Structure， Type of before Refer to Mode
in need under， UseNormalPMode
NormalPModeGOPStructure，as followsFigure 。

2.2.2. NormalMode Usage¶

RelatedInterface

CVI_VENC_CreateChn

Related

VENC_CHN_ATTR_S::stGopAttr.enGopMode = VENC_GOPMODE_NORMALP
VENC_CHN_ATTR_S::stRcAttr.u32Gop = 60
VENC_CHN_ATTR_S::stGopAttr.stNormalP.s32IPQpDelta is3， Value I ，Image 

2.3. SmartPModeGOPStructureDescriptionandUse ¶

2.3.1. SmartPMode Structure Description¶

SmartP is of Mode，Through Virtual-I and Refer to ，in of （IDR）of Frequency

P
- P ： Refer to， beforeRefer tobefore （ NormalP）
- Virtual-I ： Refer to， beforeRefer to ofIDR （）
Through IDR of ， of

and

- ：If 、 etc. 、 of
- can
- ：If or （If ），Virtual-I under
- ：need Refer to

SmartPModeGOPStructure，as followsFigure 。

2.3.2. SmartPMode Usage¶

RelatedInterface

CVI_VENC_CreateChn

Related

VENC_CHN_ATTR_S::stGopAttr.enGopMode = VENC_GOPMODE_SMARTP
VENC_CHN_ATTR_S::stGopAttr.stSmartP.u32BgInterval = 300 //  10secs for fps=30
VENC_CHN_ATTR_S::stRcAttr.u32Gop = 60 // virtual I interval，2secs for fps=30
VENC_CHN_ATTR_S::stRcAttr.u32StatTime = 10 // secs
VENC_CHN_ATTR_S:: stGopAttr.stSmartP.s32BgQpDelta = 2
VENC_CHN_ATTR_S:: stGopAttr.stSmartP.s32ViQpDelta = 0

2.4. not GOPStructureBuffer ¶

Mode	DDR
NormalP	2*PicSize
SmartP	3*PicSize

Need to before ofYUVwithandRefer to ofYUV， NormalP ， Refer to before P ， SmartP before P of ， Need to Refer to of

H.264

PicSize= FrameBufSize + mvBufSize + recBufSize

H.265

PicSize= FrameBufSize + mvBufSize + recBufSize

PleaseRefer to 《CV184x Software Refer to》of“ ”Chapter