Apply suggestions from code review

Co-authored-by: BaronGreenback <jimcartlidge@yahoo.co.uk>

Jellyfin.Api/Controllers/DynamicHlsController.cs

@@ -1453,7 +1453,7 @@ namespace Jellyfin.Api.Controllers
                             || string.Equals(state.MediaSource.Container, "hls", StringComparison.OrdinalIgnoreCase)))
                     {
                         bitStreamArgs = _encodingHelper.GetBitStreamArgs(state.AudioStream);
-                        bitStreamArgs = !string.IsNullOrEmpty(bitStreamArgs) ? " " + bitStreamArgs : string.Empty;
+                        bitStreamArgs = string.IsNullOrEmpty(bitStreamArgs) ? string.Empty : " " + bitStreamArgs;
                     }
 
                     return "-acodec copy -strict -2" + bitStreamArgs;
@@ -1494,7 +1494,7 @@ namespace Jellyfin.Api.Controllers
                         || string.Equals(state.MediaSource.Container, "hls", StringComparison.OrdinalIgnoreCase)))
                 {
                     bitStreamArgs = _encodingHelper.GetBitStreamArgs(state.AudioStream);
-                    bitStreamArgs = !string.IsNullOrEmpty(bitStreamArgs) ? " " + bitStreamArgs : string.Empty;
+                    bitStreamArgs = string.IsNullOrEmpty(bitStreamArgs) ? string.Empty : " " + bitStreamArgs;
                 }
 
                 if (EncodingHelper.IsCopyCodec(videoCodec) && state.EnableBreakOnNonKeyFrames(videoCodec))

Jellyfin.Api/Controllers/VideoHlsController.cs

@@ -448,7 +448,7 @@ namespace Jellyfin.Api.Controllers
                             || string.Equals(state.MediaSource.Container, "hls", StringComparison.OrdinalIgnoreCase)))
                     {
                         bitStreamArgs = _encodingHelper.GetBitStreamArgs(state.AudioStream);
-                        bitStreamArgs = !string.IsNullOrEmpty(bitStreamArgs) ? " " + bitStreamArgs : string.Empty;
+                        bitStreamArgs = string.IsNullOrEmpty(bitStreamArgs) ? string.Empty : " " + bitStreamArgs;;
                     }
 
                     return "-acodec copy -strict -2" + bitStreamArgs;

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -605,7 +605,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
         public string GetBitStreamArgs(MediaStream stream)
         {
-            // TODO This is auto inserted into the mpegts mux so it might not be needed
+            // TODO This is auto inserted into the mpegts mux so it might not be needed.
             // https://www.ffmpeg.org/ffmpeg-bitstream-filters.html#h264_005fmp4toannexb
             if (IsH264(stream))
             {
@@ -617,7 +617,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             }
             else if (IsAAC(stream))
             {
-                // convert adts header(mpegts) to asc header(mp4)
+                // Convert adts header(mpegts) to asc header(mp4).
                 return "-bsf:a aac_adtstoasc";
             }
             else