This is a Pixelflut server (see here or here for details) written in C# taking advantage of the relatively new performance-focused C# 7.2 feature Span<T> to reduce memory allocations during handling of Pixelflut traffic. On my system (i7-7820HQ, 32GB DDR4-2400) it is able to handle about 1 GBit/s per connection/thread (4-5 GBit/s total).

• Supported commands:
  • SIZE to get the current canvas size
  • PX X Y RRGGBB / PX X Y RRGGBBAA to set the color for the pixel at the given position
  • PX X Y to retrieve the pixel color at the given position
  • OFFSET X Y to set an offset to apply to pixels sent in the future
  • HELP to get a short help text about pixelflut
• simple output viewing via MJPEG (supported on all major browsers)
• optional NDI output
• Prometheus metrics (pixels sent/received, bytes received, current number of Pixelflut and HTTP connections, etc.)

If you're using Docker, docker-compose up --build -d should get you up and running in a few seconds.

If you don't want to use Docker, you can either run this on Windows using Visual Studio or on Windows/Linux/macOS using .NET SDK. Settings can also be set via environment variables.

Installation on Ubuntu (e.g. 22.04):

sudo apt update && sudo apt install dotnet-sdk-6.0

Example startup with HTTP port 8080, Pixelflut port 1234 (for more config options see PixelFlutServerConfig.cs):

cd PixelFlutServer/PixelFlutServer.Mjpeg
MjpegPort=8080 PixelFlutPort=1234 dotnet run -c Release