Custom element development

[Neloy sarwar]

I have written an element (Derived from Gst.Element) whose caps are as
follows:
“video/x-raw(memory:CUDAMemory), format=RGB, height=1080, width=1920”. This
is for both src and sink.
Now when I want to push buffers to the src pad and into cudaconvertscale I
get the value GST_FLOW_NOT_NEGOTIATED. What could be the reason?
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