Tvheadend is a TV streaming server and digital video recorder supporting DVB-S, DVB-S2, DVB-C, DVB-C2, DVB-T, DVB-T2, ATSC, IPTV, SAT>IP and other formats. It can also stream and record from HDHomeRun devices.
Once installed use your web browser to navigate to http://:9981/ (You can use 127.0.0.1 for the IP Address if your browser and tvheadend are on the same computer.)
Upstream Project: https://tvheadend.org/
snapcraft.yaml Build Definition: https://github.com/diddlesnaps/tvheadend/blob/master/snap/snapcraft.yaml