How to write a simple mux element?

[mariannasb]

Hi,

Is there somewhere a simple example on how to write a simple mux element
(N-to-1)?

Basically what I want to do is get a video frame from one source and append
to it metadata from another source.
(Then I have a different element which uses the metadata to overlay
something on the frame.)

I only want to output frames when I have data from both inputs and I would
like to check that the timestamps from both inputs are equal.



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