1080i capture display using OMX on DM8168

Thomas Lo

Other Parts Discussed in Thread: TVP7002

I have modified the OMX capture encode demo by removing the encoding part and just performing the capture -> dei -> display part. I can capture and display 720p video succesfully. Then I try to follow the post http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/131887.aspx to modify the program to perform 1080i capture.

But then I don't get the output I expected. This is the expected output.

and this is what I get

Something can be seen but the color and height doesn't seem to be right.

These are the changes I made: in IL_ClientInit()

capture component

outPortParamsPtr->nBufferSize = ((pAppDataPtr->nHeight/2) * pAppDataPtr->nWidth * 3) >> 1;

DEI input

inPortParamsPtr->nBufferSize = ((pAppDataPtr->nHeight/2) * pAppDataPtr->nWidth * 3) >> 1;

In IL_ClientSetCaptureParams():

paramPort.format.video.nFrameHeight = pAppData->nHeight / 2;

paramPort.nBufferSize = (paramPort.format.video.nStride * (pAppData->nHeight/2) * 3) >> 1;

sHwPortParam.eScanType = OMX_VIDEO_CaptureScanTypeInterlaced;

sHwPortParam.nMaxHeight = pAppData->nHeight / 2;

sVidDecParam.videoStandard = OMX_VIDEO_DECODER_STD_1080I_60;

in IL_ClientSetDeiParams(), the input part

paramPort.format.video.nFrameHeight = pAppData->nHeight / 2;

paramPort.nBufferSize = (paramPort.format.video.nStride * (pAppData->nHeight/2) * 3) >> 1;

chResolution.Frm0Height = pAppData->nHeight / 2;

chResolution.FrmCropHeight = pAppData->nHeight / 2;

algEnable.bAlgBypass = 0;

Is there anything else that needs to be changed to make the demo run properly? Thanks

over 13 years ago

0 Thomas Lo over 13 years ago

Expert 1560 points

I have tried changing different parameters, and with the following:

for VFCC component, I set

sHwPortParam.eScanType = OMX_VIDEO_CaptureScanTypeProgressive;

and for TVP, I set

sHwPortParam.eScanType = OMX_VIDEO_CaptureScanTypeInterlaced;

other parameters unchanged as above post,

now the ouotput seems normal, why?

0 Vimal Jain over 13 years ago in reply to Thomas Lo

TI__Expert 6535 points

Hi,

It appears there is issue with nFilledlength in VFCC in 5.04, so filewrite / chroma pointer is not calculated properly, resulting in above behavior. we will check at our end and update in next release.

Regards

Vimal

0 Xavier over 13 years ago

Genius 3180 points

Hi,Thomas:

I has used tvp7002 capture and encode 720p60 video from YPbPr,

And now i want to capture and encode VGA of 1080p size video from another Tvp7002 chip.

So i need to reconfigure the TVP7002 through IIC read and write function?

And i does not find this part in the omx capture and encode demo,

How to do this then?

Best Regards！

0 Vimal Jain over 12 years ago in reply to Xavier

TI__Expert 6535 points

Hi,

we will be releasing EZSDK 5.05 very soon, and 1080i60 capture would be available as standard example. Please wait for that.

Regards

Vimal

0 Kefil Landou over 12 years ago in reply to Vimal Jain

Prodigy 130 points

Hi Vimal,

Can you confirm that 1080i60 capture is available as standard example in the EZSDK 5.05 that has been released Oct 10th?

Thank you!

Kefil

0 Vimal Jain over 12 years ago in reply to Kefil Landou

TI__Expert 6535 points

Hi,

Yes, EZSDK 5.05.01.04 has support for 1080i60 capture. capture_encode example has been enhance to add option for setting 1080i mode. ( specifically " -m 1080i")

Regards

Vimal

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1080i capture display using OMX on DM8168