Slightly offtopic, but is there any open source/fair-code equivalent of Parsec that doesn't fail blatantly on non-standard aspect ratios such as 32:9 or have lots of other failure modes that they seemed entirely uninterested in fixing (marked as known issues for years, and no public source code available so I can't diagnose or fix them myself)?

I looked and there didn't seem to be much at all that didn't rely on just one vendor's as-buggy encoding stack - such as NVIDIA Experience software instead of just their drivers, and it's sad to see the closest tech to this this be part of some acquisition instead now by a company that seems uninterested in open sourcing anything even if it doesn't endanger any of their commercial market (e.g. Unity and their Burst LLVM compiler thing)... I don't even need all the matchmaking and team sharing stuff, I just want NVENC/etc.-based desktop streaming that doesn't bomb itself over the slightest system anomaly.

I use Nvidia's ShieldTV server in the Experience package with Moonlight as the client, but yes, the Nvidia closed source backend does fault on some things (such as only shows primary monitor in multimonitor setups), but the stream quality is much higher and latency lower than using Steam to stream my desktop.

However, there is an alternative to Nvidia's closed source backend, called Sunshine (argh, the pun): https://github.com/loki-47-6F-64/sunshine

I haven't tried it yet, as I do run Windows /w Nvidia GPU on my desktop, but it apparently uses nvenc correctly (I'm on a Turing, Turing and Ampere have that fancy low latency mode for their encoder; something Steam still doesn't engage for in home streaming, yet uses the nvenc API directly), but also can support multimonitor (has a shortcut key to cycle through monitors).