relocate more ffmpeg params. add channel delay

MediaBrowser.Api/Playback/Progressive/VideoService.cs

@@ -91,8 +91,6 @@ namespace MediaBrowser.Api.Playback.Progressive
         /// <returns>System.String.</returns>
         protected override string GetCommandLineArguments(string outputPath, StreamState state, bool performSubtitleConversions)
         {
-            var probeSize = GetProbeSizeArgument(state.MediaPath, state.IsInputVideo, state.VideoType, state.IsoType);
-
             // Get the output codec name
             var videoCodec = GetVideoCodec(state.VideoRequest);
 
@@ -108,10 +106,7 @@ namespace MediaBrowser.Api.Playback.Progressive
 
             var inputModifier = GetInputModifier(state);
 
-            return string.Format("{0} {1} {2} -fflags genpts{3} -i {4}{5}{6} {7} {8} -map_metadata -1 -threads {9} {10}{11} \"{12}\"",
-                probeSize,
-                GetUserAgentParam(state.MediaPath),
-                GetFastSeekCommandLineParameter(state.Request),
+            return string.Format("{0} -i {1}{2}{3} {4} {5} -map_metadata -1 -threads {6} {7}{8} \"{9}\"",
                 inputModifier,
                 GetInputArgument(state),
                 GetSlowSeekCommandLineParameter(state.Request),