raspi / kaukosohva Goto Github PK

This could potentially reduce lag later on (if X render lag is too high). Vulkan via layers would be easier to hook into, compared to OpenGL. Of course, if the delay that X causes is insignificant then it will do :)

Managed to get chance for another brief play around with this at the weekend.

At the moment the soundcard is set to:

ASOURCE="autoaudiosrc"

But this has the problem that it can select the wrong soundcard if you have more than one. (I have 1 soundcard for game audio and a usb sound card for microphone/voice audio when using discord)

In the end we used the following command to list the available cards:

pactl list | grep -A2 'Source #' | grep 'Name: ' | cut -d" " -f2

and then changed the ASOURCE to the following:

ASOURCE="pulsesrc device=alsa_output.pci-0000_00_1f.3.analog-stereo.monitor"

I am not sure if this is the correct way of doing it but it did work so I am assuming it is :)

I don't currently own any AMD hardware so if someone figures out working hardware encoding/decoding parameters, it would be great.

During my testing over LAN if I specify my LAN adapter directly the streaming seems to work fine but if I use wireguard over my LAN I appeared to be getting many dropped frames on the client causing the screen to be grey a lot of the time...

After reading on the internet about wireguard and dropped packets I came across a post about wireguard and MTU. Someone with an unstable wireguard connection discovered that manually setting the MTU for the wireguard interface dramatically increased stability.

I can confirm (for me at least) that setting the HOST and CLIENT to MTU = 1500 on the wireguard interface fixed the issue for me and wireguard acts just the same as if i was using the real network interface over LAN.

I have not been able to test over an internet connection so I can not confirm if this is even an issue as I believe WAN traffic uses a lower MTU than LAN anyway but its worth posting here incase others are having similar issues.

Clues:

• https://github.com/obsproject/obs-studio/blob/b32abbe33fb6897da4a688972cb56538e8e22677/plugins/obs-ffmpeg/obs-ffmpeg-nvenc.c
• https://docs.nvidia.com/video-technologies/video-codec-sdk/nvenc-video-encoder-api-prog-guide/index.html#recommended-nvenc-settings
• https://docs.nvidia.com/video-technologies/video-codec-sdk/nvenc-preset-migration-guide/index.html#h264-preset-migration-table
• https://www.nvidia.com/en-us/geforce/guides/broadcasting-guide/