kaukosohva

Play games remotely with Linux.

Current state

This is proof of concept prototype for technical users.

Lower the latency for streaming
- Minimize streaming buffer(s)
- Tune h264 parameters for lowest latency
- Tune RTP parameters for lowest latency
- Constant or variable bitrate (CBR or VBR)?

Why h264?
- Because GPU encoding/decoding hardware acceleration
Why h264 over RTP?
- Because it's a standard - https://tools.ietf.org/html/rfc6184
Why multicast?
- Eliminates need for extra server software as kernel sends host's stream to everyone connected to the VPN automatically
Why GStreamer?
- Lots of tuning options
- Lots of plugins
- Debugger - https://gstreamer.freedesktop.org/documentation/tutorials/basic/debugging-tools.html
- View latency issues in the pipeline - https://www.flathub.org/apps/details/org.freedesktop.GstDebugViewer
Does it matter who hosts VPN (WireGuard)?
- Who has the most bandwidth and stable connection is recommended

Network
- https://en.wikipedia.org/wiki/Multicast_address
- https://en.wikipedia.org/wiki/Reserved_IP_addresses
- https://en.wikipedia.org/wiki/Private_network
Video/Audio
- https://en.wikipedia.org/wiki/Real-time_Transport_Protocol
- https://en.wikipedia.org/wiki/Advanced_Video_Coding
GStreamer
- https://gstreamer.freedesktop.org/documentation/plugins_doc.html?gi-language=c
- https://github.com/GStreamer/gstreamer
- https://lists.freedesktop.org/archives/gstreamer-devel/
- https://github.com/GStreamer/gst-rtsp-server

If h264 over RTP multicast doesn't pan out there's still many things to try with GStreamer:

Drop multicast and stream to UDP port in a remote player's machine (this limits player count)
Try h264 inside MPEG-TS container over multicast
Try GStreamer's RTSP server if the host doesn't have enough upload bandwidth for all players there's RTSP proxies like rtsp-simple-server
RTMP
SRT
and others