From 049c13cec1cff2764454240674a31da7317452d0 Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Sat, 12 Dec 2015 10:42:00 -0500
Subject: [PATCH] update params when stream copying

---
 .../Playback/BaseStreamingService.cs          | 13 ++++++
 .../Playback/Hls/DynamicHlsService.cs         | 42 +------------------
 .../Playback/Progressive/VideoService.cs      | 20 +++++++--
 3 files changed, 31 insertions(+), 44 deletions(-)

diff --git a/MediaBrowser.Api/Playback/BaseStreamingService.cs b/MediaBrowser.Api/Playback/BaseStreamingService.cs
index a940be763..64862da60 100644
--- a/MediaBrowser.Api/Playback/BaseStreamingService.cs
+++ b/MediaBrowser.Api/Playback/BaseStreamingService.cs
@@ -2178,6 +2178,19 @@ namespace MediaBrowser.Api.Playback
                 inputModifier += " " + videoDecoder;
             }
 
+            if (state.VideoRequest != null)
+            {
+                var videoCodec = GetVideoEncoder(state);
+                // See if we can save come cpu cycles by avoiding encoding
+                if (string.Equals(videoCodec, "copy", StringComparison.OrdinalIgnoreCase))
+                {
+                    if (string.Equals(state.OutputContainer, "mkv", StringComparison.OrdinalIgnoreCase))
+                    {
+                        inputModifier += " -noaccurate_seek";
+                    }
+                }
+            }
+            
             return inputModifier;
         }
 
diff --git a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs
index 3724c8868..c6abffd07 100644
--- a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs
+++ b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs
@@ -291,25 +291,6 @@ namespace MediaBrowser.Api.Playback.Hls
         private double[] GetSegmentLengths(StreamState state)
         {
             var result = new List<double>();
-            if (state.VideoRequest != null)
-            {
-                var encoder = GetVideoEncoder(state);
-
-                if (string.Equals(encoder, "copy", StringComparison.OrdinalIgnoreCase))
-                {
-                    var videoStream = state.VideoStream;
-                    if (videoStream.KeyFrames != null && videoStream.KeyFrames.Count > 0)
-                    {
-                        foreach (var frame in videoStream.KeyFrames)
-                        {
-                            var seconds = TimeSpan.FromMilliseconds(frame).TotalSeconds;
-                            seconds -= result.Sum();
-                            result.Add(seconds);
-                        }
-                        return result.ToArray();
-                    }
-                }
-            }
 
             var ticks = state.RunTimeTicks ?? 0;
 
@@ -936,27 +917,8 @@ namespace MediaBrowser.Api.Playback.Hls
 
         protected override bool CanStreamCopyVideo(VideoStreamRequest request, MediaStream videoStream)
         {
-            if (videoStream.KeyFrames == null || videoStream.KeyFrames.Count == 0)
-            {
-                Logger.Debug("Cannot stream copy video due to missing keyframe info");
-                return false;
-            }
-
-            var previousSegment = 0;
-            foreach (var frame in videoStream.KeyFrames)
-            {
-                var length = frame - previousSegment;
-
-                // Don't allow really long segments because this could result in long download times
-                if (length > 10000)
-                {
-                    Logger.Debug("Cannot stream copy video due to long segment length of {0}ms", length);
-                    return false;
-                }
-                previousSegment = frame;
-            }
-
-            return base.CanStreamCopyVideo(request, videoStream);
+            return false;
+            //return base.CanStreamCopyVideo(request, videoStream);
         }
     }
 }
\ No newline at end of file
diff --git a/MediaBrowser.Api/Playback/Progressive/VideoService.cs b/MediaBrowser.Api/Playback/Progressive/VideoService.cs
index d79040dd4..51bb71bfb 100644
--- a/MediaBrowser.Api/Playback/Progressive/VideoService.cs
+++ b/MediaBrowser.Api/Playback/Progressive/VideoService.cs
@@ -100,6 +100,7 @@ namespace MediaBrowser.Api.Playback.Progressive
             {
                 // Comparison: https://github.com/jansmolders86/mediacenterjs/blob/master/lib/transcoding/desktop.js
                 format = " -f mp4 -movflags frag_keyframe+empty_moov";
+                //format = " -avoid_negative_ts disabled -start_at_zero -copyts -f mp4 -movflags frag_keyframe+empty_moov";
             }
 
             var threads = GetNumberOfThreads(state, string.Equals(videoCodec, "libvpx", StringComparison.OrdinalIgnoreCase));
@@ -135,11 +136,22 @@ namespace MediaBrowser.Api.Playback.Progressive
             }
 
             // See if we can save come cpu cycles by avoiding encoding
-            if (codec.Equals("copy", StringComparison.OrdinalIgnoreCase))
+            if (string.Equals(codec, "copy", StringComparison.OrdinalIgnoreCase))
             {
-                return state.VideoStream != null && IsH264(state.VideoStream) && string.Equals(state.OutputContainer, "ts", StringComparison.OrdinalIgnoreCase) ?
-                    args + " -bsf:v h264_mp4toannexb" :
-                    args;
+                var isOutputMkv = string.Equals(state.OutputContainer, "mkv", StringComparison.OrdinalIgnoreCase);
+
+                if (isOutputMkv)
+                {
+                    //args += " -copyts -avoid_negative_ts disabled -start_at_zero";
+                }
+
+                if (state.VideoStream != null && IsH264(state.VideoStream) &&
+                    (string.Equals(state.OutputContainer, "ts", StringComparison.OrdinalIgnoreCase) || isOutputMkv))
+                {
+                    args += " -bsf:v h264_mp4toannexb";
+                }
+
+                return args;
             }
 
             var keyFrameArg = string.Format(" -force_key_frames expr:gte(t,n_forced*{0})",