Added some ffprobe error handling

MediaBrowser.Controller/FFMpeg/FFProbe.cs

@@ -35,8 +35,11 @@ namespace MediaBrowser.Controller.FFMpeg
 
             FFProbeResult result = Run(item.Path);
 
+            if (result != null)
+            {
                 // Fire and forget
                 CacheResult(result, cachePath);
+            }
 
             return result;
         }

MediaBrowser.Controller/Providers/AudioInfoProvider.cs

@@ -26,12 +26,6 @@ namespace MediaBrowser.Controller.Providers
 
         protected override void Fetch(Audio audio, FFProbeResult data)
         {
-            if (data == null)
-            {
-                Logger.LogInfo("Null FFProbeResult for {0} {1}", audio.Id, audio.Name);
-                return;
-            }
-
             MediaStream stream = data.streams.First(s => s.codec_type.Equals("audio", StringComparison.OrdinalIgnoreCase));
 
             string bitrate = null;
@@ -176,11 +170,19 @@ namespace MediaBrowser.Controller.Providers
 
                 FFProbeResult result = FFProbe.Run(myItem, CacheDirectory);
 
-                if (result.format.tags != null)
+                if (result == null)
+                {
+                    Logger.LogInfo("Null FFProbeResult for {0} {1}", item.Id, item.Name);
+                    return;
+                }
+
+                if (result.format != null && result.format.tags != null)
                 {
                     result.format.tags = ConvertDictionaryToCaseInSensitive(result.format.tags);
                 }
 
+                if (result.streams != null)
+                {
                     foreach (MediaStream stream in result.streams)
                     {
                         if (stream.tags != null)
@@ -188,6 +190,7 @@ namespace MediaBrowser.Controller.Providers
                             stream.tags = ConvertDictionaryToCaseInSensitive(stream.tags);
                         }
                     }
+                }
 
                 Fetch(myItem, result);
             });

MediaBrowser.Controller/Providers/VideoInfoProvider.cs

@@ -27,12 +27,8 @@ namespace MediaBrowser.Controller.Providers
         
         protected override void Fetch(Video video, FFProbeResult data)
         {
-            if (data == null)
+            if (data.format != null)
             {
-                Logger.LogInfo("Null FFProbeResult for {0} {1}", video.Id, video.Name);
-                return;
-            }
-
                 if (!string.IsNullOrEmpty(data.format.duration))
                 {
                     video.RunTimeTicks = TimeSpan.FromSeconds(double.Parse(data.format.duration)).Ticks;
@@ -42,7 +38,10 @@ namespace MediaBrowser.Controller.Providers
                 {
                     video.BitRate = int.Parse(data.format.bit_rate);
                 }
+            }
 
+            if (data.streams != null)
+            {
                 // For now, only read info about first video stream
                 // Files with multiple video streams are possible, but extremely rare
                 bool foundVideo = false;
@@ -64,6 +63,7 @@ namespace MediaBrowser.Controller.Providers
                     }
                 }
             }
+        }
 
         private void FetchFromVideoStream(Video video, MediaStream stream)
         {
@@ -112,6 +112,17 @@ namespace MediaBrowser.Controller.Providers
             video.AudioStreams = streams;
         }
 
+        private void FetchFromSubtitleStream(Video video, MediaStream stream)
+        {
+            SubtitleStream subtitle = new SubtitleStream();
+
+            subtitle.Language = GetDictionaryValue(stream.tags, "language");
+
+            List<SubtitleStream> streams = video.Subtitles ?? new List<SubtitleStream>();
+            streams.Add(subtitle);
+            video.Subtitles = streams;
+        }
+        
         /// <summary>
         /// Determines if there's already enough info in the Video object to allow us to skip running ffprobe
         /// </summary>