Tvheadend

Hello, I created a streaming profile to downconvert a live HD stream (and SD for that matter) from an HDHomerun Prime IPTV stream. When invoked, the built-in player fails and the debug log reports as follows:

2018-01-16 19:22:37.648 mpegts: WRC in HDHomeRun - tuning on IPTV
2018-01-16 19:22:37.648 subscription: 0009: "HTTP" subscribing on channel "WRC", weight: 100, adapter: "IPTV", network: "HDHomeRun", mux: "WRC", service: "WRC", profile="Low Bitrate", hostname="192.168.101.1", username="admin", client="Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
2018-01-16 19:22:38.434 transcode: 0002: 1:MPEG2VIDEO 704x480 > MPEG2VIDEO 704x480 (mpeg2video)
2018-01-16 19:22:38.434 transcode: 0002: 2:AC3 > Passthrough
2018-01-16 19:22:38.434 transcode: 0002: 3:AC3 ==> Passthrough
2018-01-16 19:22:38.928 libav: Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
2018-01-16 19:22:38.928 libav: Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
2018-01-16 19:22:38.928 libav: Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
2018-01-16 19:22:41.332 webui: Stop streaming /stream/channel/1d793fb3dd88f45cb02d0887985abd28?profile=Low%20Bitrate, muxer reported errors
2018-01-16 19:22:41.332 subscription: 0009: "HTTP" unsubscribing from "WRC", hostname="192.168.101.1", username="admin", client="Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"

I've searched and searched online to no fix. Any ideas?