From faefbf36cc761f6b488f9ad3dfdd3ebdf7022c8a Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Mon, 6 Jun 2016 13:33:55 -0400
Subject: adjust bitrate in h264/h265 conversions

---
 MediaBrowser.Model/Dlna/ResolutionNormalizer.cs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'MediaBrowser.Model/Dlna/ResolutionNormalizer.cs')

diff --git a/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs b/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
index 8a412ac2c..ed18fed65 100644
--- a/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
+++ b/MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
@@ -56,5 +56,25 @@ namespace MediaBrowser.Model.Dlna
                 MaxHeight = maxHeight
             };
         }
+
+        private static double GetVideoBitrateScaleFactor(string codec)
+        {
+            if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase) ||
+                string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase))
+            {
+                return .5;
+            }
+            return 1;
+        }
+
+        public static int ScaleBitrate(int bitrate, string inputVideoCodec, string outputVideoCodec)
+        {
+            var inputScaleFactor = GetVideoBitrateScaleFactor(inputVideoCodec);
+            var outputScaleFactor = GetVideoBitrateScaleFactor(outputVideoCodec);
+            var scaleFactor = outputScaleFactor/inputScaleFactor;
+            var newBitrate = scaleFactor*bitrate;
+
+            return Convert.ToInt32(newBitrate);
+        }
     }
 }
-- 
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