Backport pull request #8152 from jellyfin/release-10.8.z

Fix support for rtsp streams over tcp

Authored-by: Bill Thornton <billt2006@gmail.com>

Merged-by: Cody Robibero <cody@robibe.ro>

Original-merge: b2fb96ffed

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -4970,7 +4970,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             if (state.InputProtocol == MediaProtocol.Rtsp)
             {
-                inputModifier += " -rtsp_transport tcp -rtsp_transport udp -rtsp_flags prefer_tcp";
+                inputModifier += " -rtsp_transport tcp+udp -rtsp_flags prefer_tcp";
             }
 
             if (!string.IsNullOrEmpty(state.InputAudioSync))