H264 encoder process hangs on DM8127

Hi,

We will get back on this by early next week.

regards

Yashwant

Okay. Thanks !

Hi Ashton,

The debugTrace binary file generated needs to be parsed using DebugTracer utility. I have attached the parsed file in readable format.

We will analyse this log to find out the reason for hang.

Can you please share the configuration used to encode this stream?

8228.3146.tracefile.txt_parsed.txt

Ram

Hi, Ram

I am sorry that I am not sure if the attached trace data file contains the frame which made the encoder hanged.

So I made another trace file that should contain the frame which made enc hanged.
Please refer to the attachment.

The operation is like the following :

1. I have 2 channel obj, channel 1 is JPEG and channel 2 is H264.

2. I want to change the codec of channel 1 to H264, so I delete the previous encode object and create a new h264 encode object.

3. Then I need to generate H264 frame header. So I set 

algObj.u.h264AlgIfObj.dynamicParams.videnc2DynamicParams.generateHeader = XDM_GENERATE_HEADER;

error = handle->fxns->ividenc.control((IVIDENC2_Handle) handle, XDM_SETPARAMS, (IVIDENC2_DynamicParams *) &pChObj->algObj.u.h264AlgIfObj.dynamicParams, (IVIDENC2_Status *) &pChObj->algObj.u.h264AlgIfObj.status); 

....
....

error = handle->fxns->ividenc.process((IVIDENC2_Handle) handle, inputBufDesc, outputBufDesc, (IVIDENC2_InArgs *) inArgs, (IVIDENC2_OutArgs *) outArgs);

This works fine. I got the H264 header for channel 1.

(Encode loop)

 [m3video] channel = 1, set to generate header.
 [m3video] channel = 1. before calling process()

 ividenc.process()

 [m3video] channel = 1, after calling process()
 [m3video] 
 [m3video] channel = 2, before calling process()

ividenc.process() --> hangs here when calling this

...

Hi Aston,

Please find the parsed trace file for the binary file you shared. Since the encoder is hanging, trace file doesn't have log for hanging frame. You may have to manually copy it from DDR memory to a binary file.

The sequence you followed to encode looks fine. Not sure why there is hang.

We will try to reporduce the same sequence and let you know.

Ram

5466.0068.tracefile.txt_parsed.txt

Hi, Ram.

Thanks for the info.
I try to dump this trace data directly from DDR memory address after encoder hanged.

Please help to parse this trace file.

Thank you.

4861.trace.txt

Hi Aston,

Please find the parsed Trace file. Frame 1123 is hanging.

Release IVAHD                             : NOT_STARTED
Encode Process                            : NOT_FINISHED

But no clue what has gone wrong.

Ram

3704.4861.trace.txt_parsed.txt

Hi Ram,

Thank you very much for your help and information.

Is there any way to produce further debug data, like tracing encoding process steps or status?
Seems like the memory somewhere of the next frame is overwritten after creating new enc obj and generate a header frame.
If the next frame is skipped, encoder will not hang. 

If there is any way I can try, please tell me.

Thank you.
Best Regards, 

Hi Aston,

Can you please provide me these info?

1) Is the hang observed only if you set first channel for generate header? If you don't set it for generate header, is second channel process going fine?

2)Can you please make sure that handle, input and output buffers passed to both the channels are different?

3)If possible, please hsare the source code of your testApplication with the sequence you mentioned.

Ram

Hi Ram,

1) Yes, only if set first channel for generate header.

2) I checked each handle,  input and output buffer address, They are different for both channel.

3) Sorry, I can't but the steps are simple as the following. Using DVRRDK_01.06.00.11

i) Set two channel for H.264, and keep them encoding frames.
ii) Delete the H.264 algIf obj of 1st channel and create a new H.264 algIf obj and set to generate header for the 1st channel.
iii) After the header is generated for the 1st channel. The encoder will hang while encoding the next frame which is for the 2nd channel.

If any luck, please let me know.

Thank you very much for your help.
Best Regards,