I'm using a K-World ATSC Tuner[1] on an Orange Pi Zero[2] (not Banana Pi as previously mentioned). Armbian[3] nightly installs with no modifications, and then Mythbackend[4] is installed using apt-get.

I bound to the machine's IP instead of localhost, and then was able to enter that into Kodi, where a list of TV stations Myth found appeared. It was surprisingly easy! I haven't had any issues with stuttering or skipping when streaming to a single Kodi instance - haven't tried any more than that.

[1] https://www.linuxtv.org/wiki/index.php/KWorld_ATSC_340U

[2] http://www.orangepi.org/orangepizero/

[3] https://www.armbian.com/orange-pi-zero/

[4] https://www.mythtv.org/wiki/Mythbackend