Low framerate on dynamic content despite ideal network conditions and settings

[JPenuchot]

Describe the Bug

Moonlight reports incoming framerates from network that are lower than expected (sometimes under 30FPS) on anything that isn't a static image. This happens with a bitrate cap of 150mbps (max allowed by Moonlight), network speeds above 500mbps, and latency under 2ms, and it happens regardless of the encoder settings (high performance, llhq, cbr, etc...).

Reported in-game framerates are well above 60FPS, but Sunshine will simply drop half of them.

Expected Behavior

I would expect a steady 60FPS, considering the network conditions are optimal (or close to it).

Additional Context

No response

Sunshine Host Operating System and Version

Arch

Architecture

64bit

Sunshine Version

0.13.0

GPU Type

Nvidia

GPU Model

GTX 970

GPU Driver/Mesa Version

510.54

Capture Method (Linux Only)

X11

[KuleRucket]

Do you have NvFBC working?

[JPenuchot]

I'm not able to get Sunshine to run with patched utils. Here's the output:

Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info: CLIENT CONNECTED
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info: Found [1] outputs
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info: Virtual Desktop: 1920x1080
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info: XrandR: available
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info: -- Output --
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info:   Resolution: 1920x1080
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info:   Offset: 0x0
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Error: Couldn't destroy session handle: Unable to cleanup NvFBC
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info: Screencasting with NvFBC
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info: Color coding [Rec. 601]
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Info: Color range: [MPEG]
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Error: Failed to start capture session: Invalid external buffer capabilities
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Error: Couldn't destroy session handle: Unable to cleanup NvFBC
Mar 21 10:47:47 jpenuchot-nzxt sunshine[1400]: [2022:03:21:10:47:47]: Error: Couldn't release NvFBC context from current thread: Unable to cleanup NvFBC

Note: nvidia-utils was patched using nvlax through this package: https://aur.archlinux.org/packages/nvidia-utils-nvlax/

[KuleRucket]

Your problem is now this:
"Error: Failed to start capture session: Invalid external buffer capabilities"

see #100

If you downgrade vulkan as in my comment, it should work.

[JPenuchot]

Thanks!

[IceDBorn]

I installed nvidia-utils-nvlax and downgraded vulkan-icd-loader and it does not fix the framerate issues.

[JPenuchot]

And did you downgrade the other Vulkan packages such as vulkan headers, etc. as well?

[IceDBorn]

Is it really necessary? I was getting this exact same error "Error: Failed to start capture session: Invalid external buffer capabilities" with the screen recorder and it works fine by just downgrading vulkan-icd-loader

[IceDBorn]

I downgraded all the vulkan packages to the same version, the issue persists.

[JPenuchot]

Not sure it's necessary, but I'm not sure having mismatched Vulkan components is a good idea.

In my case I just ran sudo downgrade lib32-vulkan-icd-loader vulkan-headers vulkan-icd-loader vulkan-tools to downgrade the packages, rebooted, then rebuilt the sunshine AUR package.

Also I've added export CUDA_PATH=/opt/cuda at the end of my /etc/makepkg.conf to make sure CMake finds nvcc.

[IceDBorn]

Thanks that fixed the issue!