The role of nvvidconv and tiler in the code seems to be duplicated

[autodrive2022]

• deepstream6.1.1
• on A6000

In the code of deepstream-test3 there is:

  gst_bin_add_many (GST_BIN (pipeline), queue1, pgie, queue2, nvdslogger, tiler,
      queue3, nvvidconv, queue4, nvosd, queue5, sink, NULL);
    /* we link the elements together
    * nvstreammux -> nvinfer -> nvdslogger -> nvtiler -> nvvidconv -> nvosd
    * -> video-renderer */
    if (!gst_element_link_many (streammux, queue1, pgie, queue2, nvdslogger, tiler,
          queue3, nvvidconv, queue4, nvosd, queue5, sink, NULL)) {
      g_printerr ("Elements could not be linked. Exiting.\n");
      return -1;
    }

where tiler = gst_element_factory_make (“nvmultistreamtiler”, “nvtiler”).
And I found that the nvmultistreamtiler plugin has converted the gst batch into a gst buffer, but also added nvidconv, this nvidconv is necessary? I test to remove this nvidconv is also possible.

[Fiona.Chen]

nvvideoconvert’s function is format convert(YUV to RGB, system memory to Nvidia GPU memeory or vice versa) and scaling. There is no conflict between nvmultistreamtiler and nvvideoconvert

[autodrive2022]

But in this deepstream-test3 case code gst_element_link_many, I remove the nvidconv plugin is also working properly, why?

[Fiona.Chen]

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks

It is because nvdsosd and nveglglessink both support NVMM NV12 format buffers.