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How to configure input port for OpenMax encoder component using DM8168

Steve Boone
Intellectual 660 points


Does know how to properly configure the input port for an OpenMax encoder component? Specifically, in the OMX_PARAM_PORTDEFINITIONTYPE structure, how should the following members be set:

  • nBufferSize
  • video.cMIMEType
  • video.nStride
  • video.eCompressionFormat
  • video.eColorFormat

I have tried many different values that all produce OMX_ErrorBadParameter errors when I call OMX_AllocateBuffer on the port. 

  • 0
    TI__Genius 9510 points

     

    Typical Port Setting are configured as follows

    • nBufferSize = (paramPort.format.video.nStride * pAppData->nHeight * 3) >> 1;
    • video.nStride = Width
    • video.eCompressionFormat = OMX_VIDEO_CodingUnused
    • video.eColorFormat = OMX_COLOR_FormatYUV420SemiPlanar

     

    Are you sure that the ports have been enabled before allocating the buffer:

     OMX_SendCommand (pAppData->pEncoder, OMX_CommandPortEnable,
                       OMX_VFDC_INPUT_PORT_START_INDEX, NULL);