1 files changed, 22 insertions, 5 deletions
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index 61340cd24..5846a603a 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -1380,24 +1380,40 @@ namespace MediaBrowser.Controller.MediaEncoding
 
         public int? GetAudioBitrateParam(BaseEncodingJobOptions request, MediaStream audioStream)
         {
+            if (audioStream == null)
+            {
+                return null;
+            }
+
             if (request.AudioBitRate.HasValue)
             {
                 // Don't encode any higher than this
                 return Math.Min(384000, request.AudioBitRate.Value);
             }
 
-            return null;
+            // Empty bitrate area is not allow on iOS
+            // Default audio bitrate to 128K if it is not being requested
+            // https://ffmpeg.org/ffmpeg-codecs.html#toc-Codec-Options
+            return 128000;
         }
 
         public int? GetAudioBitrateParam(int? audioBitRate, MediaStream audioStream)
         {
+            if (audioStream == null)
+            {
+                return null;
+            }
+
             if (audioBitRate.HasValue)
             {
                 // Don't encode any higher than this
                 return Math.Min(384000, audioBitRate.Value);
             }
 
-            return null;
+            // Empty bitrate area is not allow on iOS
+            // Default audio bitrate to 128K if it is not being requested
+            // https://ffmpeg.org/ffmpeg-codecs.html#toc-Codec-Options
+            return 128000;
         }
 
         public string GetAudioFilterParam(EncodingJobInfo state, EncodingOptions encodingOptions, bool isHls)
@@ -2659,9 +2675,10 @@ namespace MediaBrowser.Controller.MediaEncoding
             state.MediaSource = mediaSource;
 
             var request = state.BaseRequest;
-            if (!string.IsNullOrWhiteSpace(request.AudioCodec))
+            var supportedAudioCodecs = state.SupportedAudioCodecs;
+            if (request != null && supportedAudioCodecs != null && supportedAudioCodecs.Length > 0)
             {
-                var supportedAudioCodecsList = request.AudioCodec.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries).ToList();
+                var supportedAudioCodecsList = supportedAudioCodecs.ToList();
 
                 ShiftAudioCodecsIfNeeded(supportedAudioCodecsList, state.AudioStream);
 
@@ -3068,7 +3085,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 }
             }
 
-            var whichCodec = videoStream.Codec.ToLowerInvariant();
+            var whichCodec = videoStream.Codec?.ToLowerInvariant();
             switch (whichCodec)
             {
                 case "avc":