DM814x Encoder Dynamic Parameter configuration with interlace encoding

Patel Jignesh

Hello TI,

Currently we are using ezsdk_dm814x-evm_5_05_01_04 with NDA signed Overlay code. We are running demo for interlace encoding with Field seperated configuration.

We have following dataLayout configuration:

parameters.dataLayout = IVIDEO_FIELD_SEPARATED;
parameters.topFieldFirstFlag = 1;
parameters.secondFieldOffsetHeight[0] = 0;
parameters.secondFieldOffsetHeight[1] = 0;
parameters.secondFieldOffsetHeight[2] = 0;
parameters.secondFieldOffsetWidth[0] = 0;
parameters.secondFieldOffsetWidth[1] = 0;
parameters.secondFieldOffsetWidth[2] = 0;

Interlace Encoding is working correct but we observe following problem.

1. Last buffer given to encoder input is TOP field and then set "parameters.videoDynamicParams.h264EncDynamicParams.videnc2DynamicParams.forceFrame = IVIDEO_IDR_FRAME;" with setConfig. So once this setting done Encoder start encode TOP field as bottom and Bottom as TOP field.

Please suggest change to resolve this problem as soon as possible.

Thanks,

Jignesh

over 9 years ago

0 Margarita Gashova over 9 years ago

TI__Guru* 80190 points

Hello,

You could check the h264 enc user guide and these threads to compare the settings:

Could you post all dynamic params that you set?

BR
Margarita

0 Margarita Gashova over 9 years ago in reply to Margarita Gashova

TI__Guru* 80190 points

Hello,

Could you try ID 1 & ID 2?

Let us know the result.

BR
Margarita

0 Patel Jignesh over 9 years ago in reply to Margarita Gashova

Intellectual 400 points

Hello Margarita,

I can not use ID 1 or ID 2 because I need to run encoder in parallel with DEI.

So Encoder demand frame like: (YF1 YF2 UVF1 UVF2) while DEI needed input buffer field by field.

Please give any alternative if exist.

Thanks,

Jignesh R Patel

0 Gajanan Maske over 9 years ago in reply to Patel Jignesh

Expert 2325 points

Hi Jignesh,

Can you apply XDM_FLUSH before IDR in these particular cases where you had observed Top fields encoded as Bottom Filed

Regards

Gajanan

0 Patel Jignesh over 9 years ago in reply to Gajanan Maske

Intellectual 400 points

Hello Gajanan,

Thanks for reply, sure I will try your suggestion and let you know the result.

Thanks,

Jignesh Patel

0 Geeth Rajammal over 9 years ago in reply to Patel Jignesh

Intellectual 560 points

Hi,

We are also facing same issue, and we implemented XDM_FLUSH.

But still the field drop issue exists.

Please let us know how this issue can be resolved.

Regards,
Geetha

0 Patel Jignesh over 9 years ago in reply to Geeth Rajammal

Intellectual 400 points

Hi Geetha,

After implementing this suggestion we also make sure from application that this parameter change apply only on TOP field. Means after this parameter change first frame given to encoder is TOP field only.

With above change we have not yet observed above issue. So you can try it. Hope this will help you.

Regards,

Jignesh

0 Geeth Rajammal over 9 years ago in reply to Patel Jignesh

Intellectual 560 points

Hi Jignesh,

Thanks for your reply, We are using gstreamer omx layer to capture the video input.

1. During initial encoder settings configuration, We have implemented XDM_FLUSH before IDR_FRAME, Is this implementation correct.

2. You have mentioned Last buffer given to encoder input is TOP field, let us know how to identify whether last buffer given to encode input is TOP field

3. Let us know how you had implemented in the application that this parameter change apply only on TOP field.

Regards,
Geetha

0 Patel Jignesh over 9 years ago in reply to Geeth Rajammal

Intellectual 400 points

Hi Geetha,

1. Yes this is correct.

2. We are using EZSDK so capture(VFCC) is giving field information in nFlags variable. So if we receive IDR request then wait until capture give TOP field. So once TOP field receive then send IDR request to encoder. This is possible because encoder can process parameter at every frame.

Regards,

Jignesh

0 Geeth Rajammal over 9 years ago in reply to Patel Jignesh

Intellectual 560 points

Hi Jignesh

I have one doubt.

Whether XDM_FLUSH have to be implemented only once during initial configuration or on every IDR Frame request when capture provide TOP field.

One more thing, We wanted to verify the nFlags variable, so using Log_print2 printed this variable and we are not able to find the value in
./loggerSMDump.out 0x9E400000 0x100000 all

After build we are copying
#sudo cp -rf ./component-sources/omx-ti81xx-src_05_02_00_48/bin/dm816xbm/bin/ti816x-evm/dm816xbm_m3video_whole_program_debug.xem3 /media/ROOTFS/usr/share/ti/ti-media-controller-utils/dm816x_hdvicp.xem3

Regards,
Geetha

0 Patel Jignesh over 9 years ago in reply to Geeth Rajammal

Intellectual 400 points

Hi Geetha,

XDM_FLUSH needed for every IDR request.

nFlags variable is part of application OMX buffer you can check it. Also you can find it in capture part easily.

Please see this file for nFlags variable : src/ti/omx/comp/vfcc/src/omx_vfcc_drvif.c

Regards,

Jignesh

0 Geeth Rajammal over 9 years ago in reply to Patel Jignesh

Intellectual 560 points

Hi Jignesh,

Thanks for your reply.

Let us know whether to use FVID2_BUF_FMT_FIELD or FVID2_BUF_FMT_FRAME in case interlaced capture.

Regards,

Geetha

0 Geeth Rajammal over 9 years ago in reply to Geeth Rajammal

Intellectual 560 points

Hi Jignesh,

Field identification is happening in VFCC capture component, and XDM_FLUDH need to be done in VENC element.

We tried using variable to know TOP field in VFCC and used same variable in VENC to do XDM_FLUSH, but
because of the variable externed in VENC, it resulted in compilation error.

Please suggest us how to use the identified fieldid in VFCC to do XDM_FLUSH in VENC.

Sorry for troubling you.

Regards,
Geetha

0 Patel Jignesh over 9 years ago in reply to Geeth Rajammal

Intellectual 400 points

Hi Geetha,

We identified TOP or BOTTOM field from Application not at below encoder level. Still if you want to implement it then implement logic in application that set nFlags value of input buffer of encoder and according to that you can implement XDM_FLUSH in encoder.

Regards,
Jignesh Patel

0 Geeth Rajammal over 8 years ago in reply to Patel Jignesh

Intellectual 560 points

Hi Jignesh,

We are able to identify TOP field and Bottom field on the capture side, nFlags value of input buffer of encoder gives me 0 value. Is there way to identify Top field and bottom field on the encoder side.

Regards,

Geetha Rajammal.M

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DM814x Encoder Dynamic Parameter configuration with interlace encoding