I want to be able to set keyframeable attributes on a clip. These attributes then affect the output of a transmitter or a player.
My idea of how to do this is to create a filter that has the attributes I need, but doesn't actually alter the pixels. Instead it just stores the attributes somehow (in the PPix?). Then the transmitter/player will read the values of these attributes and modify its output. The question is whether it's possible to store data about the frame inside a filter, and read it from a transmitter/player.
I guess I could create my own pixel format that contains the data, but that seems a bit overkill, and inconvenient.