From d02c0ba3f44269fa2ed4a86c2d472155bc4fdf09 Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Mon, 3 Mar 2014 23:58:19 -0500
Subject: [PATCH] added hls changes for live tv

---
 MediaBrowser.Api/Playback/BaseStreamingService.cs | 5 ++++-
 MediaBrowser.Api/Playback/Hls/BaseHlsService.cs   | 6 ++++--
 MediaBrowser.Api/Playback/Hls/VideoHlsService.cs  | 4 +++-
 MediaBrowser.Api/Playback/StreamState.cs          | 1 +
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/MediaBrowser.Api/Playback/BaseStreamingService.cs b/MediaBrowser.Api/Playback/BaseStreamingService.cs
index c6bcbded8c..fea44c9a81 100644
--- a/MediaBrowser.Api/Playback/BaseStreamingService.cs
+++ b/MediaBrowser.Api/Playback/BaseStreamingService.cs
@@ -265,7 +265,7 @@ namespace MediaBrowser.Api.Playback
 
                 if (cpuCount >= 4)
                 {
-                    return EncodingQuality.HighQuality;
+                    //return EncodingQuality.HighQuality;
                 }
 
                 return EncodingQuality.HighSpeed;
@@ -1418,6 +1418,9 @@ namespace MediaBrowser.Api.Playback
 
             state.HasMediaStreams = mediaStreams.Count > 0;
 
+            state.SegmentLength = state.ReadInputAtNativeFramerate ? 3 : 10;
+            state.HlsListSize = state.ReadInputAtNativeFramerate ? 20 : 1440;
+
             return state;
         }
 
diff --git a/MediaBrowser.Api/Playback/Hls/BaseHlsService.cs b/MediaBrowser.Api/Playback/Hls/BaseHlsService.cs
index c6055ed51d..5324d2c805 100644
--- a/MediaBrowser.Api/Playback/Hls/BaseHlsService.cs
+++ b/MediaBrowser.Api/Playback/Hls/BaseHlsService.cs
@@ -285,7 +285,7 @@ namespace MediaBrowser.Api.Playback.Hls
             // If performSubtitleConversions is true we're actually starting ffmpeg
             var startNumberParam = performSubtitleConversions ? GetStartNumber(state).ToString(UsCulture) : "0";
             
-            var args = string.Format("{0} {1} -i {2}{3} -map_metadata -1 -threads {4} {5} {6} -sc_threshold 0 {7} -hls_time {8} -start_number {9} -hls_list_size 1440 \"{10}\"",
+            var args = string.Format("{0} {1} -i {2}{3} -map_metadata -1 -threads {4} {5} {6} -sc_threshold 0 {7} -hls_time {8} -start_number {9} -hls_list_size {10} \"{11}\"",
                 itsOffset,
                 inputModifier,
                 GetInputArgument(state),
@@ -296,6 +296,7 @@ namespace MediaBrowser.Api.Playback.Hls
                 GetAudioArguments(state),
                 state.SegmentLength.ToString(UsCulture),
                 startNumberParam,
+                state.HlsListSize.ToString(UsCulture),
                 outputPath
                 ).Trim();
 
@@ -307,11 +308,12 @@ namespace MediaBrowser.Api.Playback.Hls
 
                     var bitrate = hlsVideoRequest.BaselineStreamAudioBitRate ?? 64000;
 
-                    var lowBitrateParams = string.Format(" -threads {0} -vn -codec:a:0 libmp3lame -ac 2 -ab {1} -hls_time {2} -start_number {3} -hls_list_size 1440 \"{4}\"",
+                    var lowBitrateParams = string.Format(" -threads {0} -vn -codec:a:0 libmp3lame -ac 2 -ab {1} -hls_time {2} -start_number {3} -hls_list_size {4} \"{5}\"",
                         threads,
                         bitrate / 2,
                         state.SegmentLength.ToString(UsCulture),
                         startNumberParam,
+                        state.HlsListSize.ToString(UsCulture),
                         lowBitratePath);
 
                     args += " " + lowBitrateParams;
diff --git a/MediaBrowser.Api/Playback/Hls/VideoHlsService.cs b/MediaBrowser.Api/Playback/Hls/VideoHlsService.cs
index ca598c2751..a2080995d0 100644
--- a/MediaBrowser.Api/Playback/Hls/VideoHlsService.cs
+++ b/MediaBrowser.Api/Playback/Hls/VideoHlsService.cs
@@ -163,7 +163,9 @@ namespace MediaBrowser.Api.Playback.Hls
                 return IsH264(state.VideoStream) ? "-codec:v:0 copy -bsf h264_mp4toannexb" : "-codec:v:0 copy";
             }
 
-            const string keyFrameArg = " -force_key_frames expr:if(isnan(prev_forced_t),gte(t,.1),gte(t,prev_forced_t+5))";
+            var keyFrameArg = state.ReadInputAtNativeFramerate ?
+                " -force_key_frames expr:if(isnan(prev_forced_t),gte(t,.1),gte(t,prev_forced_t+1))" : 
+                " -force_key_frames expr:if(isnan(prev_forced_t),gte(t,.1),gte(t,prev_forced_t+5))";
 
             var hasGraphicalSubs = state.SubtitleStream != null && !state.SubtitleStream.IsExternal &&
                                  (state.SubtitleStream.Codec.IndexOf("pgs", StringComparison.OrdinalIgnoreCase) != -1 ||
diff --git a/MediaBrowser.Api/Playback/StreamState.cs b/MediaBrowser.Api/Playback/StreamState.cs
index 55d7b22e2c..3874fa6036 100644
--- a/MediaBrowser.Api/Playback/StreamState.cs
+++ b/MediaBrowser.Api/Playback/StreamState.cs
@@ -56,6 +56,7 @@ namespace MediaBrowser.Api.Playback
         public string LiveTvStreamId { get; set; }
 
         public int SegmentLength = 10;
+        public int HlsListSize;
 
         public long? RunTimeTicks;