Does source.on_metadata inherit the id?

[Loxbie]

Hey the title says it all: does source.on_metadata() inherit the id of the given source? In my example I have an input stream which I later on use in a mix. I also have server functions for this source, these are automatically created. But the namespace differs, some use the id I set on top in_stream_0 and the last one has the id on_metadata.

input_stream_0 =
  input.http(
    id="in_stream_0",
    max_buffer=input_stream_max_buffer,
    timeout=input_stream_timeout,
    start=false,
    ""
  )

# Enable metadata insertion and store callbacks
input_stream_0 = insert_metadata(input_stream_0)
in_stream_insert_meta_0 = input_stream_0.insert_metadata
in_stream_last_meta_0 = input_stream_0.last_metadata

# Map metadata
def on_stream_meta_0(meta) =
  lm = (in_stream_last_meta_0() ?? [])
  merge_meta(lm, meta)
end
input_stream_0 = metadata.map(on_stream_meta_0, input_stream_0)

input_stream_0 = source.on_metadata(input_stream_0, on_metadata_notification)

print("#{source.id(input_stream_0)}")

The print statement gives me on_metadata, I expected in_stream_0. Is this intended?

[vitoyucepi]

Hi @Loxbie,
Yes, this behavior is intended, but you can set your own id parameter like this:
input_stream_0 = source.on_metadata(input_stream_0, on_metadata_notification, id="my_identifier").
Alternatively, you can use the on_metadata method defined for source:
input_stream_0.on_metadata(on_metadata_notification).

The on_metadata function looks like a legacy function that existed before the records syntax was introduced.