Jellyfin: Difference between revisions

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 }
 </syntaxHighlight>
+If you want to use an Arc GPU for transcoding, you may need to override the ffmpeg version used by jellyfin to ensure that it is compiled with <code>vpl</code> and, potentially, <code>unfree</code>. An example to achieve this through [[Overlays|an overlay]]:<syntaxhighlight lang="nix">
+{ pkgs, ... }:
+let
+  jellyfin-ffmpeg-overlay = (
+    _ prev: {
+      jellyfin-ffmpeg = prev.jellyfin-ffmpeg.override {
+        # Exact version of ffmpeg_* depends on what jellyfin-ffmpeg package is using.
+        # In 24.11 it's ffmpeg_7-full.
+        # See jellyfin-ffmpeg package source for details
+        ffmpeg_7-full = prev.ffmpeg_7-full.override {
+          withMfx = false; # This corresponds to the older media driver
+          withVpl = true; # This is the new driver
+          withUnfree = true;
+        };
+      };
+    }
+  );
+in
+{
+  nixpkgs.overlays = [ jellyfin-ffmpeg-overlay ];
+}
+</syntaxhighlight>This will trigger a rebuild of Jellyfin package, but the end result is that if you select "Intel QuickSync (QSV)" you should see little to no CPU load when transcoding.
+Note that if your system has an integrated GPU (one built into the CPU) and a discrete GPU, you may need to select the QSV device in the "Playback" settings. Otherwise the device may be picked at random and produce random results. You can use <code>intel_gpu_top -L</code> to identify the devices.
 Related:  [[Accelerated Video Playback]] and [[Intel Graphics]]