Constant bitrate UDP
Sometimes you can meet very smart DVB muxer that will be able to merge streams together and allow variable bitrate, but usually you need to fill your dedicated band with MPEG-TS bytes.
Flussonic Medai Server can do it by adding zero padding that cannot be added by headend.
Also this device will require sending PCR (stream timing) very often: up to once per 20 ms, so it may happen that we will need to put 2 PCR during single frame.
This is also possible with Flussonic Media Server.