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--- infra:ndi [2025/09/04 18:02] – created d404d_idp.hackeriet.no
+++ infra:ndi [2025/09/13 19:57] (current) – d404d_idp.hackeriet.no
@@ Line 1: / Line 1: @@
-====== Abstract ======
+====== NDI network ======
+===== Abstract =====
 Hackeriet has 3 permanent video devices:
   * The "pinball" TV
@@ Line 12: / Line 14: @@
 If we were to install NDI receivers on these video devices, we'd be able to support a decent amount of realtime usecases in addition to more casual Youtube video playback.
-====== Solutions evaluated so far ======
+===== Solutions evaluated so far =====
+**Receivers**
   * https://dicaffeine.com/
     * Provides a significantly low bar-of-entry for getting NDI devices up and running, and managing them remotely
-    * Runs like utter shit on our RPis -- Low resolution mode must be used, and drops frames
+    * Performance
-    * Does however provide packages for Ubuntu: Should be possible to run with good results on NUCs, ThinkCenters etc.
+      * Runs like utter shit on our RPis -- Low resolution mode must be used, and drops frames
+      * Runs pretty good on our Intel NUCs -- Sometimes lag/frame drop on high res, but generaly works satisfiably, I have some theories on what's happening here
+**Sources**
+  * The [[https://github.com/DistroAV/DistroAV|DistroAV project]] provides NDI plugins for OBS, with support for Windows, Linux, and MacOS.
+**The protocol itself**
+  * 1080p60 can easily go up to 130 Mbps persistent throughput and 150 Mbps peaks -- <del>Should wire up the LAG on the audio rack switch</del> forgot that the access ports are 100 Mbps, need to use another switch
+  * Hackeriet wifi introduces significant latency compared to other locations, even though it can handle the bandwidth. Old AP? Radio time congestion due to so many WiFi devices?
+  * Works fine for audio, but doesn't really help for most of our use cases there
+===== Work so far =====
+  * Installed Dicaffeine on (wired networking expected):
+    * ''ndi-nuc1'' (mounted on Hackeriet TV)
+    * ''lydrack-pc'' (currently unconnected)
+  * Setup:
+    * Ubuntu 22.04 (per deps, fixes appreciated)
+    * Hacker-ID SSO (group ''project-avinfra'')
+    * User ''ndi-screen''
+      * Timed autosign-in in GDM (10 secs, see ''/etc/gdm3/custom.conf'')
+      * Sway WM
+      * i3status with custom statusbar (IP + hostname + date)
+      * dicaffeine disabled on personal user (the post-install script is CURSED)
+      * dicaffeine enabled on ''ndi-screen''
+      * Custom wallpaper