From e031c7bcaaa7e15be839f2329e7e2721966af302 Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Sun, 2 Jun 2013 10:47:28 -0400
Subject: [PATCH] don't request a higher bitrate than source content

---
 MediaBrowser.Api/Playback/Hls/VideoHlsService.cs |  9 +++++++--
 .../Playback/Progressive/VideoService.cs         | 16 ++++++++++------
 2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/MediaBrowser.Api/Playback/Hls/VideoHlsService.cs b/MediaBrowser.Api/Playback/Hls/VideoHlsService.cs
index 8273335989..19c7d6e05c 100644
--- a/MediaBrowser.Api/Playback/Hls/VideoHlsService.cs
+++ b/MediaBrowser.Api/Playback/Hls/VideoHlsService.cs
@@ -158,9 +158,14 @@ namespace MediaBrowser.Api.Playback.Hls
 
             if (state.VideoRequest.VideoBitRate.HasValue)
             {
-                args += string.Format(" -b:v {0}", state.VideoRequest.VideoBitRate.Value);
-            }
+                // Make sure we don't request a bitrate higher than the source
+                var currentBitrate = state.VideoStream == null ? state.VideoRequest.VideoBitRate.Value : state.VideoStream.BitRate ?? state.VideoRequest.VideoBitRate.Value;
 
+                var bitrate = Math.Min(currentBitrate, state.VideoRequest.VideoBitRate.Value);
+
+                args += string.Format(" -b:v {0}", bitrate);
+            }
+            
             // Add resolution params, if specified
             if (state.VideoRequest.Width.HasValue || state.VideoRequest.Height.HasValue || state.VideoRequest.MaxHeight.HasValue || state.VideoRequest.MaxWidth.HasValue)
             {
diff --git a/MediaBrowser.Api/Playback/Progressive/VideoService.cs b/MediaBrowser.Api/Playback/Progressive/VideoService.cs
index 3e92c96ec4..80ea77d8e6 100644
--- a/MediaBrowser.Api/Playback/Progressive/VideoService.cs
+++ b/MediaBrowser.Api/Playback/Progressive/VideoService.cs
@@ -160,8 +160,7 @@ namespace MediaBrowser.Api.Playback.Progressive
                 args += string.Format(" -r {0}", request.Framerate.Value);
             }
 
-            // Add the audio bitrate
-            var qualityParam = GetVideoQualityParam(request, codec);
+            var qualityParam = GetVideoQualityParam(state, codec);
 
             if (!string.IsNullOrEmpty(qualityParam))
             {
@@ -256,10 +255,10 @@ namespace MediaBrowser.Api.Playback.Progressive
         /// <summary>
         /// Gets the video bitrate to specify on the command line
         /// </summary>
-        /// <param name="request">The request.</param>
+        /// <param name="state">The state.</param>
         /// <param name="videoCodec">The video codec.</param>
         /// <returns>System.String.</returns>
-        private string GetVideoQualityParam(VideoStreamRequest request, string videoCodec)
+        private string GetVideoQualityParam(StreamState state, string videoCodec)
         {
             var args = string.Empty;
 
@@ -284,9 +283,14 @@ namespace MediaBrowser.Api.Playback.Progressive
                 args = "-mbd rd -flags +mv4+aic -trellis 2 -cmp 2 -subcmp 2 -bf 2";
             } 
             
-            if (request.VideoBitRate.HasValue)
+            if (state.VideoRequest.VideoBitRate.HasValue)
             {
-                args += " -b:v " + request.VideoBitRate;
+                // Make sure we don't request a bitrate higher than the source
+                var currentBitrate = state.VideoStream == null ? state.VideoRequest.VideoBitRate.Value : state.VideoStream.BitRate ?? state.VideoRequest.VideoBitRate.Value;
+
+                var bitrate = Math.Min(currentBitrate, state.VideoRequest.VideoBitRate.Value);
+
+                args += " -b:v " + bitrate;
             }
 
             return args.Trim();