nvvideosink is causing "Wrong surface count in ConvertBuffer"

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
#1

Hi all,

we have a problem when using nvvideosink. The pipeline is running, but we are flooded with “Wrong surface count in ConvertBuffer”.

This is our code:

// Build pipeline
    m_pPipeline = gst_pipeline_new("pipeline");

    m_testSource        = gst_element_factory_make("videotestsrc", "testsrc");
    GstElement* vc      = gst_element_factory_make("videoconvert", "vc");
    m_testSourceFilter  = gst_element_factory_make("capsfilter", "testsrc_filter");

    m_nvVideoConv       = gst_element_factory_make("nvvideoconvert", "vidconv");
    m_nvVideoConvFilter = gst_element_factory_make("capsfilter", "vidconv_filter");
    
    m_sink              = gst_element_factory_make("nvvideosink", "nvvideosink");

    // add elements to pipeline
    gst_bin_add_many(   GST_BIN (m_pPipeline), 
                        m_testSource,
                        vc,
                        m_testSourceFilter,
                        m_nvVideoConv,
                        m_nvVideoConvFilter,
                        m_sink,
                        NULL);

    g_object_set(   G_OBJECT(m_sink), 
                    "display", _display,
                    "stream", _eglstream,
                    "sync", false,
                    "async", false,
                    NULL);    

    // Set caps.
    m_testSourceFilterCaps = gst_caps_from_string("video/x-raw, width=(int)1280, height=(int)720, framerate=(fraction)60/1, format=(string)I420");
    g_object_set(G_OBJECT(m_testSourceFilter), "caps", m_testSourceFilterCaps, NULL);                                                

    m_nvVideoConvFilterCaps = gst_caps_from_string("video/x-raw(memory:NVMM), width=(int)1280, height=(int)720, framerate=(fraction)60/1, format=(string)I420");
    g_object_set(G_OBJECT(m_nvVideoConvFilter), "caps", m_nvVideoConvFilterCaps, NULL);                                                

    // Linking.
    if (!gst_element_link_many( m_testSource,
                                vc,
                                m_testSourceFilter,
                                m_nvVideoConv,
                                m_nvVideoConvFilter,
                                m_sink,
                                nullptr))
    {
        qInfo("Not all GstElements could be linked!");
    }

Notes:

  • we added the 'normal' videoconvert to the pipeline without success. The result without it is the same
  • We can assure that the display and stream is valid as another pipeline (h264 decode from an appsrc) is running fine
  • When using "nvoverlaysink" instead - the stream is renderered properly

Did anyone encounter a similar problem and has some insights?

Is the code for “nvvideosink” available, so we could have a look into what is throwing this message?

Thanks + Best regards,
Bodo

#2

Hi,
nvvideoconvert is for DeepStream SDK and not compatible with nvvideosink. Please replace it with nvvidconv and try again.

#3

Hi Dane,

ok, that helped. We managed to actually get an output now.

Thank you

#4