I’ve come across a few people trying to get it to work with the pi and it didn’t work out well for them.
That was of course using the mag emulator. But, in the pi’s defense, many high powered boxes such as the nvidia shield also has jittery video playback.
If it’s IPTV you want, get a proper device. You can pick up a mag 254 for probably less than the pi3. One you figure that you need storage and stuff for your pi, you’ve instantly spent more money on the pi then you could have with a real STB..