I am trying to add a custom meta-data (a python string, for example) to the NvMeta object that is passed between deepstream plugins.
Let’s say I want to attach this custom meta-data to the frame_meta (pyds.NvDsFrameMeta). I found out that I should use [
nvds_add_user_meta_to_frame] (https://docs.nvidia.com/metropolis/deepstream/5.0DP/python-api/Methods/methodsdoc.html#nvds-add-user-meta-to-frame) for this.
But I have some problems with creating the NvDsUserMeta to attach to the NvDsFrameMeta.
I tried something like:
meta = pyds.NvDsUserMeta()
meta.user_meta_data = “some string”
but I get this:
TypeError: (): incompatible function arguments. The following argument types are supported:
1. (self: pyds.NvDsUserMeta, arg0: capsule) -> None
Then, I tried to convert the python object into a kind of ctype reference using
ctypes with no success.
I have read
deepstream_gst_metadata.c and understand how this all works in C.
Please help me understand how to do this properly in Python. I think what would me help is to know how to convert a Python object reference to a void pointer of C and vice-versa.