support tagging 3d as mvc

MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs

@@ -557,6 +557,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
                         vf = "crop=iw:ih/2:0:0,setdar=dar=a,crop=min(iw\\,ih*dar):min(ih\\,iw/dar):(iw-min(iw\\,iw*sar))/2:(ih - min (ih\\,ih/sar))/2,setsar=sar=1,scale=600:trunc(600/dar/2)*2";
                         // ftab crop heigt in half, set the display aspect,crop out any black bars we may have made the scale width to 600
                         break;
+                    default:
+                        break;
                 }
             }