DVRRDK encoder JPEG frame rate

Thomas Lo

I want to change the encoder frame rate for the JPEG stream to 1 frame per 3 second, instead of the default 1 fps, in order to save some loading. I know it won't make big difference, but I am trying to optimize it.

The function Venc_setDynamicParam(ch_id, 0, &ch_para, VENC_FRAMERATE) takes frame rate and multiply 1000, so I tried

EncLink_ChFpsParams enc_para;
UINT i, ch_id;

for (i=0; i<_this->num_ch; i++)
{
enc_para.chId = i + _this->venc_param.numPrimaryChn;
enc_para.targetFps = 333;
enc_para.targetBitRate = 0;

System_linkControl(_this->link.enc.id, ENC_LINK_CMD_SET_CODEC_FPS,
&enc_para, sizeof(enc_para), TRUE);
}

but it is not working. What other changes do I need?

Thanks

over 12 years ago

0 Sivagamy Govindasamy over 12 years ago

TI__Expert 6950 points

What is the use case here? In standard capture, encode, decode, display usecases, the input to mjpeg encoder is fed at 1fps rate. You need to adjust the output frame rate of the link feeding to encoder.

Refer encoder user guide for the definition of targetFrameRate & numUnitsInTicks. We are not experimented with changing numUnitsInTicks from dvr_rdk perspective.

0 Badri Narayanan over 12 years ago in reply to Sivagamy Govindasamy

TI__Guru 59700 points

encLink requires some changes to support fractional frame rate. For purpose of testing load don't change the encLink parameters and just control the input frame rate from the previous link as Sivagamy mentioned.

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DVRRDK encoder JPEG frame rate