add codec tag value

MediaBrowser.MediaEncoding/Encoder/EncodingJob.cs

@@ -368,6 +368,17 @@ namespace MediaBrowser.MediaEncoding.Encoder
             }
         }
 
+        public string TargetVideoCodecTag
+        {
+            get
+            {
+                var stream = VideoStream;
+                return !Options.Static
+                    ? null
+                    : stream == null ? null : stream.CodecTag;
+            }
+        }
+
         public bool? IsTargetAnamorphic
         {
             get

MediaBrowser.MediaEncoding/Encoder/EncodingJobFactory.cs

@@ -750,7 +750,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
                 state.IsTargetCabac,
                 state.TargetRefFrames,
                 state.TargetVideoStreamCount,
-                state.TargetAudioStreamCount);
+                state.TargetAudioStreamCount,
+                state.TargetVideoCodecTag);
 
             if (mediaProfile != null)
             {

MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs

@@ -130,6 +130,7 @@ namespace MediaBrowser.MediaEncoding.Probing
             var stream = new MediaStream
             {
                 Codec = streamInfo.codec_name,
+                CodecTag = streamInfo.codec_tag_string,
                 Profile = streamInfo.profile,
                 Level = streamInfo.level,
                 Index = streamInfo.index,