cuGraphicsEGLRegisterImage makes gstreamer plugin not recognized

Autonomous Machines Jetson & Embedded Systems Jetson Nano
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1

I am trying to use a custom cuda kernel (no opencv) in my gstreamer plugin and I followed this instruction on how to map an egl image. I am also orienting myself on gstdsexample.cpp, so I created the NvBufSurface current_frame exactly the same way, NvBufSurface surface is created in the example.

Then I map it:

  CHECK_NVBUFSURFACE_STATUS(NvBufSurfaceMap(current_frame, -1, -1, NVBUF_MAP_READ_WRITE), "Couldn't map current frame buffer");
  CHECK_NVBUFSURFACE_STATUS(NvBufSurfaceSyncForCpu(current_frame, -1, -1), "Can't sync current frame to cpu");
  CHECK_NVBUFSURFACE_STATUS(NvBufSurfaceMapEglImage(current_frame, -1), "Could not map egl image from current frame");

Then I register the egl image with a CUgraphicsResource :

CUgraphicsResource current_frame_ressource = nullptr;
CHECK_CUDAEGL_STATUS(
    cuGraphicsEGLRegisterImage(&current_frame_ressource, current_frame->surfaceList[0].mappedAddr.eglImage, CU_GRAPHICS_MAP_RESOURCE_FLAGS_NONE),
    "Could not register egl image");

And after successful compilation I start it with the following pipeline:

GST_DEBUG=3 gst-launch-1.0 nvarguscamerasrc bufapi-version=1 ! 'video/x-raw(memory:NVMM),width=3264,height=2464,format=(string)NV12, framerate=21/1' ! mx.sink_0 nvstreammux width=3264 height=2464 batch-size=1 name=mx ! myplugin ! fakesink

I get the following error and the execution is terminated:

~$ GST_DEBUG=3 gst-launch-1.0 nvarguscamerasrc bufapi-version=1 ! 'video/x-raw(memory:NVMM),width=3264,height=2464,format=(string)NV12, framerate=21/1' ! mx.sink_0 nvstreammux width=3264 height=2464 batch-size=1 name=mx ! myplugin ! fakesink
0:00:00.091920432 29459   0x55b110a4f0 WARN     GST_ELEMENT_FACTORY gstelementfactory.c:456:gst_element_factory_make: no such element factory "myplugin"!
0:00:00.091992569 29459   0x55b110a4f0 ERROR           GST_PIPELINE grammar.y:816:priv_gst_parse_yyparse: no element "myplugin"
0:00:00.092034393 29459   0x55b110a4f0 ERROR           GST_PIPELINE grammar.y:901:priv_gst_parse_yyparse: link has no sink [source=@0x55b11d4280]
0:00:00.093516501 29459   0x55b110a4f0 ERROR           GST_PIPELINE grammar.y:901:priv_gst_parse_yyparse: link has no source [sink=@0x55b11dd1e0]
WARNING: erroneous pipeline: no element "myplugin"

I only get this with the addition of the call to the cuGraphicsEGLRegisterImage function.

Why is that?

3

Hi,
Are you able to use dsexample and put your implementation into the plugin? Since it is an existing implementation and open source, you may use the plugin directly.

5

Hi,

I solved the issue at hand.
It was a missing linked lib that you suggested in this post, but isn’t mentioned in this post.

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