add MediaInfo.sec response header

MediaBrowser.Api/Playback/BaseStreamingService.cs

@@ -2088,6 +2088,15 @@ namespace MediaBrowser.Api.Playback
             responseHeaders["transferMode.dlna.org"] = string.IsNullOrEmpty(transferMode) ? "Streaming" : transferMode;
             responseHeaders["realTimeInfo.dlna.org"] = "DLNA.ORG_TLAG=*";
 
+            if (string.Equals(GetHeader("getMediaInfo.sec"), "1", StringComparison.OrdinalIgnoreCase))
+            {
+                if (state.RunTimeTicks.HasValue)
+                {
+                    var ms = TimeSpan.FromTicks(state.RunTimeTicks.Value).TotalMilliseconds;
+                    responseHeaders["MediaInfo.sec"] = string.Format("SEC_Duration={0};", Convert.ToInt32(ms).ToString(CultureInfo.InvariantCulture));
+                }
+            }
+
             if (state.RunTimeTicks.HasValue && !isStaticallyStreamed && profile != null)
             {
                 AddTimeSeekResponseHeaders(state, responseHeaders);

MediaBrowser.Api/Playback/Progressive/BaseProgressiveStreamingService.cs

@@ -1,12 +1,10 @@
-using System.Globalization;
-using MediaBrowser.Common.IO;
+using MediaBrowser.Common.IO;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Devices;
 using MediaBrowser.Controller.Dlna;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Library;
-using MediaBrowser.Controller.LiveTv;
 using MediaBrowser.Controller.MediaEncoding;
 using MediaBrowser.Controller.Net;
 using MediaBrowser.Model.IO;
@@ -15,6 +13,7 @@ using MediaBrowser.Model.Serialization;
 using ServiceStack.Web;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;