From c70508b08984d62d3b62d233f6ce4078f2a75bb1 Mon Sep 17 00:00:00 2001
From: James Harvey <44349936+jmshrv@users.noreply.github.com>
Date: Sat, 4 Feb 2023 01:56:14 +0000
Subject: [PATCH] Add movflags to mp4 audio encoding

---
 .../MediaEncoding/EncodingHelper.cs              | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index a844e64433..d08a5116a0 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -5786,6 +5786,22 @@ namespace MediaBrowser.Controller.MediaEncoding
                 }
             }
 
+            // Copy the movflags from GetProgressiveVideoFullCommandLine
+            // See # for explanation on why this is needed
+            var mp4ContainerNames = new HashSet<String> {
+                "mp4",
+                "m4a",
+                "m4p",
+                "m4b",
+                "m4r",
+                "m4v",
+            };
+
+            if (mp4ContainerNames.Contains(state.OutputContainer.ToLower()))
+            {
+                audioTranscodeParams.Add("-movflags frag_keyframe+empty_moov+delay_moov");
+            }
+
             var threads = GetNumberOfThreads(state, encodingOptions, null);
 
             var inputModifier = GetInputModifier(state, encodingOptions, null);