PROCESSOR-SDK-DRA8X-TDA4X: encoder output

Chaohui Zheng

Part Number: PROCESSOR-SDK-DRA8X-TDA4X

Hi TI:
I tried to run the encoder demo through ./run_app_encode.sh.

When the demo was finished, encode_output.h264 was generated in the app_cam_out directory, and then I use ffplay encode_output.h264
to play this .h264 file, I found that it is not the same as the NV12 data before encoding.

Before encoding, my nv12 data is continuous, for example, its sequence is 1, 2, 3, 4, 5, 6, 7, 8 ,9..., but after encoding, I found that the video sequence became 1111,5555,9999..., which made my stream stuck. I tried to modify the tivxSetNodeParameterNumBufByIndex(obj->imgMosaicObj.node, 1, APP_BUFFER_Q_DEPTH); in the app_create_graph(AppObj *obj) function to tivxSetNodeParameterNumBufByIndex(obj->imgMosaicObj.node, 1, 1);, then the result after encoding was correct .

So I want to ask if your company has the same problem and how fix this problem.

The attachment is my file, one is the h264 bitstream of dump before modifying tivxSetNodeParameterNumBufByIndex, the other is the bitstream after modifying tivxSetNodeParameterNumBufByIndex.
regards!encoder_output.zip

over 4 years ago

0 Brijesh Jadav over 4 years ago

TI__Guru**** 476565 points

Hi Chaohui Zheng,

This essentially will disable pipelining, as you are just keeping one buffer at the Mosaic output.

Looks like something to do in encoder. does it always repeat the frame, or is it in a particular sequence?

Rgds,

Brijesh

0 Chaohui Zheng over 4 years ago in reply to Brijesh Jadav

Intellectual 510 points

Hi Brijesh,

thanks for your reply.

yes ,it repeat the frame.The output of the encoder is updated every 4 frames and is consistent with the buffer depth(APP_BUFFER_Q_DEPTH). The image content in these 4 frames is the same.

regards!

0 Brijesh Jadav over 4 years ago in reply to Chaohui Zheng

TI__Guru**** 476565 points

Hi Zheng,

Just want to check one more experiment, instead of using buffer_q_dept, can you try using any other number 'n' and see if it repeats 'n' number of time?

Rgds,

Brijesh

0 Chaohui Zheng over 4 years ago in reply to Brijesh Jadav

Intellectual 510 points

Hi Brijesh,

can you try using any other number 'n' and see if it repeats 'n' number of time?-----------------------------yes ,it repeats 'n' number of time.

I did 4 experiments and changed buffer_q_dept to 1, 4,10,20.The bigger the buffer_q_dept, the more the video is stuck

The output of encoder node is saved in the attachment file. you can see it.

Regards!1&4.zip

0 Chaohui Zheng over 4 years ago in reply to Chaohui Zheng

Intellectual 510 points

10&2010&20.zip

0 Chaohui Zheng over 4 years ago in reply to Chaohui Zheng

Intellectual 510 points

Hi Brijesh,

Does your company have the same problem?How is the processing progress?

Because of this problem, my work cannot continue now.

Hope to get your help.

Regards!

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PROCESSOR-SDK-DRA8X-TDA4X: encoder output