Fixed: Formatting of audio channels from media info for some files

src/NzbDrone.Core.Test/MediaFiles/MediaInfo/MediaInfoFormatterTests/FormatAudioChannelsFixture.cs

@@ -104,6 +104,20 @@ namespace NzbDrone.Core.Test.MediaFiles.MediaInfo.MediaInfoFormatterTests
             MediaInfoFormatter.FormatAudioChannels(mediaInfoModel).Should().Be(7.1m);
         }
 
+        [Test]
+        public void should_skip_empty_groups_in_AudioChannelPositions()
+        {
+            var mediaInfoModel = new MediaInfoModel
+            {
+                AudioChannels = 2,
+                AudioChannelPositions = " / 2/0/0.0",
+                AudioChannelPositionsText = null,
+                SchemaRevision = 3
+            };
+
+            MediaInfoFormatter.FormatAudioChannels(mediaInfoModel).Should().Be(2);
+        }
+
         [Test]
         public void should_sum_first_series_of_numbers_from_AudioChannelPositions()
         {

src/NzbDrone.Core/MediaFiles/MediaInfo/MediaInfoFormatter.cs

@@ -36,7 +36,7 @@ namespace NzbDrone.Core.MediaFiles.MediaInfo
             }
 
             return audioChannelPositions.Replace("Object Based / ", "")
-                                        .Split(new string[] { " / " }, StringSplitOptions.None)
+                                        .Split(new string[] { " / " }, StringSplitOptions.RemoveEmptyEntries)
                                         .First()
                                         .Split('/')
                                         .Sum(s => decimal.Parse(s, CultureInfo.InvariantCulture));