Does VENC run on DM816x support multi-channel encode?

Hi,

VENC supports multi-channel encode. Can you share details about the failure? You can also share the firmware traces obtained through loggerSMDump utility. See http://processors.wiki.ti.com/index.php/OMX_Viewing_Media_Controller_Traces on how to use this utility. If you are using a previous version of SDK (5.02), then loggerSMDump should be used without the <size> parameter as follows:

./loggerSMDump.out 0x9e400000 video

Regards,

Anirban

Hi Anirban,

It looks like I mistakenly passed the wrong handle to OMX_GetHandle() function second time. Now I can create a second handle.

ANOTHER QUESTION: If I use two OMX_HANDLETYPE * pHandle, does it mean the two channels are working on two separate HDVICP? I'm working with 8168, it has three HDVICP cores.

Hi Anirban,

I guess at least it's possible to have two HDVICP work simultaneity, if one is overloaded?

Yes. That is right!

Regards,

Anirban

Hi Anirban,

I'm glad to know that.

You did help me a lot! Thank you!

Hi,

have you managed to make the two-component encoder setup work?

Could you specify how did you do that?

As I understand from being unable to run two processes that use OMX simultaneously(getting assert in syslink for the second process being run), I have to create a second component within the same process and write similar threads as for the first one (data supplier, data writer, callbacks, etc.).

I experimented with the EZSDK 5.03 encode example to get a second encoder component running: I can create and initialize both components successfully,

set the encoding params for both components, set the state of both components to "Idle", allocate input buffers for the first encoder component,

but  have some unknown issues with allocating buffers for the second component.

The call of OMX_AllocateBuffer() for the second component fails with the "OMX_ErrorBadParameter" error.

The code that fails is:

 for (i = 0; i < pAppData->encILComp1->inPortParams->nBufferCountActual; i++)
  {

    eError = OMX_AllocateBuffer (pAppData->pEncHandle1,
                            &pAppData->encILComp1->inPortParams->pInBuff[i],
                            OMX_VIDENC_INPUT_PORT,
                            pAppData,
                            pAppData->encILComp1->inPortParams->nBufferSize);

    if (eError != OMX_ErrorNone)
    {
      printf ("Error in encode OMX_AllocateBuffer(): %s \n",
              IL_ClientErrorToStr (eError));
      goto EXIT;
    }
  }
  printf (" encoder1 input port allocate buffer done \n ");

  for (i = 0; i < pAppData->encILComp2->inPortParams->nBufferCountActual; i++)
  {

    eError = OMX_AllocateBuffer (pAppData->pEncHandle2,
                            &pAppData->encILComp2->inPortParams->pInBuff[i],
                            OMX_VIDENC_INPUT_PORT,
                            pAppData,
                            pAppData->encILComp2->inPortParams->nBufferSize);

    if (eError != OMX_ErrorNone)
    {
      printf ("Error in encoder 2 OMX_AllocateBuffer(): %s \n",
              IL_ClientErrorToStr (eError));
      goto EXIT;
    }
  }
  printf (" encoder 2 input port allocate buffer done \n ");

pAppData->encILComp#->inPortParams->nBufferCountActual is set to "2" for both components via defines in ilclient_utils.h:

#define IL_CLIENT_ENC_INPUT_BUFFER_COUNT         (2)

#define IL_CLIENT_ENC_OUTPUT_BUFFER_COUNT     (2)

Hi,

Sorry but I haven't gone as far as you did.

I only managed to create two handles. And I haven't tried two processes neither.

Currently I'm working on having two video streams simultaneously. Later, I maybe move to two encoders programming.

So would you please kindly inform me if you achieve anything?

Zhang

Sure, I'll share the results if it would be useful.

Hi,

I've been trying to get multi-channel encode to work using OMX in EZSDK but haven't been succesful. I'm just wondering whether any of you have made any progress since last posting to this thread.

I modified the encode example from EZSDK to make 2 encode components running simultaneously but it doesn't successfully encode the video. I have been able to create a handle for both components, setup all the parameters, allocate all the buffers, and move both components into the execute state. However, when I actually send video frames to the second handle, the EmptyBufferDone callback is executed but the FillBufferDone callback never gets called. The first encoder takes frames and encodes them just fine.

If anyone has any idea what could be wrong, or has any working examples of multi-channel encoding that I could look at, it would be greatly appreciated.