The mixer and translator topologies require their respective outgoing RTP streams to adjust the bit rate, packet rate, etc., to adapt to the least-capable path in each of the other domains.
That way one can avoid lowering the quality to the least-capable endpoint in all the domains at the cost (complexity, delay, equipment) of the mixer, SFM, or translator, and potentially the media sender (multicast/layered encoding and sending the different representations).
The mixer and translator topologies require their respective outgoing RTP streams to adjust the bit rate, packet rate, etc., to adapt to the least-capable path in each of the other domains.
That way one can avoid lowering the quality to the least-capable endpoint in all the domains at the cost (complexity, delay, equipment) of the mixer, SFM, or translator, and potentially the media sender (multicast/layered encoding and sending the different representations).