Forums - Performance of H.264 encoding on Sensation XE (OMX)

Hello all,

I've tried to do H.264 encoding using HTC Sensation XE.

But it takes 240ms (average) to encode 1 frame (544x960 YUV format).

I also found the size after H.264 encoding all around 30K (per frame), which is way too big. 

I guess there's something wrong with my parameter, please help to check my parameter:

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FrameWidth=544
FrameHeight=960
FrameRate=10 
RateControl=1 
RateControl=3 
BitRate=544*960*3

Comparing to the sample code of qcom_video_codec_sample_1_3_1:

FrameWidth=320
FrameHeight=240
FrameRate=10
RateControl=3 (OMX_Video_ControlRateVariableSkipFrames)
BitRate=320*240*3

The code is as below:

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if (OMX_VIDEO_AVCProfileBaseline == omxProfileLevel.eProfile &&

OMX_VIDEO_AVCLevel41 <= omxProfileLevel.eLevel) {

DBGL();

break;

}

omxAVC.bEnableUEP = OMX_FALSE;

omxAVC.bEnableFMO = OMX_FALSE;

omxAVC.bEnableASO = OMX_FALSE;

omxAVC.bEnableRS = OMX_FALSE;

omxAVC.eProfile = OMX_VIDEO_AVCProfileBaseline;

if (omxAVC.eProfile == OMX_VIDEO_AVCProfileBaseline) {

omxAVC.nSliceHeaderSpacing = 0;

omxAVC.nPFrames = 1/*IFrame Interval*/ * ctx->omxProp.frameRate;

omxAVC.nBFrames = 0;

omxAVC.bUseHadamard = OMX_TRUE;

omxAVC.nRefFrames = 1;

omxAVC.nRefIdx10ActiveMinus1 = 0;

omxAVC.nRefIdx11ActiveMinus1 = 0;

omxAVC.bEntropyCodingCABAC = OMX_FALSE;

omxAVC.bWeightedPPrediction = OMX_FALSE;

omxAVC.bconstIpred = OMX_FALSE;

omxAVC.bDirect8x8Inference = OMX_FALSE;

omxAVC.bDirectSpatialTemporal = OMX_FALSE;

omxAVC.nCabacInitIdc = 0;

}

omxAVC.nAllowedPictureTypes = OMX_VIDEO_PictureTypeI;

if (omxAVC.nPFrames > 0) {

omxAVC.nAllowedPictureTypes |= OMX_VIDEO_PictureTypeP;

}

if (omxAVC.nBFrames > 0) {

omxAVC.nAllowedPictureTypes |= OMX_VIDEO_PictureTypeB;

}

omxAVC.bFrameMBsOnly = OMX_TRUE;

omxAVC.bMBAFF = OMX_FALSE;

omxAVC.eLoopFilterMode = OMX_VIDEO_AVCLoopFilterEnable;

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