I think I fixed my issue, so I’ll list the settings below if they are helpful with others. The one item that remains is background downloads - you all should vote here to help prioritize it - iOS allows background downloads, why doesn’t Plex enable it - Feature Suggestions - Plex Forum
Network
- Disable IPv6 (unlikely to be helpful in this, but I don’t use IPv6 internally so don’t need it)
- Preferred Newtork Interface - I only have one, but i set it to that instead of “Any”
- Disable “Treat WAN IP as LAN Bandwidth”
- Disable “Enable Relay”
Transcoder
- Transcoder Quality - Automatic (i have latest i9, but when I set to this instead of make cpu hurt, definitely improved speed of transcode)
- Background transcoding x264 preset- ultra fast
- Enable HDR Tone Mapping (some people won’t have hardware support/setup for this, but works for me)
- Use Hardware Acceleration when available
- User hardware-accelerated video encoding
-Hardware transcoding device - Auto
Some of these may have impacts on quality of transcode (e.g. the ultra fast), but I recommend giving it a shot first to see if it eliminates your error, then going from there.
