diff --git a/MediaBrowser.Api/Playback/BaseStreamingService.cs b/MediaBrowser.Api/Playback/BaseStreamingService.cs
index 00caa74d62..f66363da67 100644
--- a/MediaBrowser.Api/Playback/BaseStreamingService.cs
+++ b/MediaBrowser.Api/Playback/BaseStreamingService.cs
@@ -477,7 +477,7 @@ namespace MediaBrowser.Api.Playback
 
             var pts = string.Empty;
 
-            if (state.SubtitleStream != null && state.SubtitleStream.IsTextSubtitleStream)
+            if (state.SubtitleStream != null && state.SubtitleStream.IsTextSubtitleStream && !state.VideoRequest.CopyTimestamps)
             {
                 var seconds = TimeSpan.FromTicks(state.Request.StartTimeTicks ?? 0).TotalSeconds;
 
@@ -604,6 +604,10 @@ namespace MediaBrowser.Api.Playback
         {
             var seconds = Math.Round(TimeSpan.FromTicks(state.Request.StartTimeTicks ?? 0).TotalSeconds);
 
+            var setPtsParam = state.VideoRequest.CopyTimestamps
+                ? string.Empty
+                : string.Format(",setpts=PTS -{0}/TB", seconds.ToString(UsCulture));
+
             if (state.SubtitleStream.IsExternal)
             {
                 var subtitlePath = state.SubtitleStream.Path;
@@ -621,18 +625,18 @@ namespace MediaBrowser.Api.Playback
                 }
 
                 // TODO: Perhaps also use original_size=1920x800 ??
-                return string.Format("subtitles=filename='{0}'{1},setpts=PTS -{2}/TB",
+                return string.Format("subtitles=filename='{0}'{1}{2}",
                     MediaEncoder.EscapeSubtitleFilterPath(subtitlePath),
                     charsetParam,
-                    seconds.ToString(UsCulture));
+                    setPtsParam);
             }
 
             var mediaPath = state.MediaPath ?? string.Empty;
 
-            return string.Format("subtitles='{0}:si={1}',setpts=PTS -{2}/TB",
+            return string.Format("subtitles='{0}:si={1}'{2}",
                 MediaEncoder.EscapeSubtitleFilterPath(mediaPath),
                 state.InternalSubtitleStreamOffset.ToString(UsCulture),
-                seconds.ToString(UsCulture));
+                setPtsParam);
         }
 
         /// <summary>
diff --git a/MediaBrowser.Api/Playback/Progressive/VideoService.cs b/MediaBrowser.Api/Playback/Progressive/VideoService.cs
index 50aa2df19c..0af419cf33 100644
--- a/MediaBrowser.Api/Playback/Progressive/VideoService.cs
+++ b/MediaBrowser.Api/Playback/Progressive/VideoService.cs
@@ -65,7 +65,8 @@ namespace MediaBrowser.Api.Playback.Progressive
     /// </summary>
     public class VideoService : BaseProgressiveStreamingService
     {
-        public VideoService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, IDlnaManager dlnaManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, IMediaSourceManager mediaSourceManager, IZipClient zipClient, IJsonSerializer jsonSerializer, IImageProcessor imageProcessor, IHttpClient httpClient) : base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, dlnaManager, subtitleEncoder, deviceManager, mediaSourceManager, zipClient, jsonSerializer, imageProcessor, httpClient)
+        public VideoService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, IDlnaManager dlnaManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, IMediaSourceManager mediaSourceManager, IZipClient zipClient, IJsonSerializer jsonSerializer, IImageProcessor imageProcessor, IHttpClient httpClient)
+            : base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, dlnaManager, subtitleEncoder, deviceManager, mediaSourceManager, zipClient, jsonSerializer, imageProcessor, httpClient)
         {
         }
 
@@ -137,11 +138,6 @@ namespace MediaBrowser.Api.Playback.Progressive
 
             var isOutputMkv = string.Equals(state.OutputContainer, "mkv", StringComparison.OrdinalIgnoreCase);
 
-            if (state.RunTimeTicks.HasValue && state.VideoRequest.CopyTimestamps)
-            {
-                args += " -copyts -avoid_negative_ts disabled -start_at_zero";
-            }
-            
             if (string.Equals(videoCodec, "copy", StringComparison.OrdinalIgnoreCase))
             {
                 if (state.VideoStream != null && IsH264(state.VideoStream) &&
@@ -160,10 +156,22 @@ namespace MediaBrowser.Api.Playback.Progressive
 
             var hasGraphicalSubs = state.SubtitleStream != null && !state.SubtitleStream.IsTextSubtitleStream;
 
+            var hasCopyTs = false;
             // Add resolution params, if specified
             if (!hasGraphicalSubs)
             {
-                args += GetOutputSizeParam(state, videoCodec);
+                var outputSizeParam = GetOutputSizeParam(state, videoCodec);
+                args += outputSizeParam;
+                hasCopyTs = outputSizeParam.IndexOf("copyts", StringComparison.OrdinalIgnoreCase) != -1;
+            }
+
+            if (state.RunTimeTicks.HasValue && state.VideoRequest.CopyTimestamps)
+            {
+                if (!hasCopyTs)
+                {
+                    args += " -copyts";
+                }
+                args += " -avoid_negative_ts disabled -start_at_zero";
             }
 
             var qualityParam = GetVideoQualityParam(state, videoCodec);