Fix ffmpeg path on ARM docker image

CONTRIBUTORS.md

@@ -128,6 +128,7 @@
  - [xosdy](https://github.com/xosdy)
  - [XVicarious](https://github.com/XVicarious)
  - [YouKnowBlom](https://github.com/YouKnowBlom)
+ - [KristupasSavickas](https://github.com/KristupasSavickas)
 
 # Emby Contributors
 

Dockerfile.arm

@@ -74,4 +74,4 @@ VOLUME /cache /config /media
 ENTRYPOINT ["./jellyfin/jellyfin", \
     "--datadir", "/config", \
     "--cachedir", "/cache", \
-    "--ffmpeg", "/usr/lib/jellyfin-ffmpeg"]
+    "--ffmpeg", "/usr/lib/jellyfin-ffmpeg/ffmpeg"]