If I watch it live, sometimes the video just freezes for a few seconds, then comes back. If recording, it skips ahead several seconds (obviously from the same effect). It
only happens on 1 channel. I've considered and eliminated these possibilities:
1. Weak signal: actually, this signal is the strongest one I receive. Even if I used rabbit ears it's hard not to get the signal and I use an outdoor antenna.
2. Required more throughput than my system can handle: that seems unlikely, because it is the only channel that is 720p. I often record from several 1080i channels and never have this problem.
3. Hardware: I've connected the tuner to my Linux computer and watched for a long time. Never had a problem.
All I can say about the channel is:
* ATSC
* Services tab has it as 539.028MHz
* Real channel 25, virtual channel 4.1
* The attached screen caps for the Muxes tab and Services tab on the web interface.
The tuner is a Hauppauge WinTV-HVR 955Q. I'm running Kodi 18.4 on Raspbian 10 and Tvheadend 4.2.8.