From f8c88aa632a91f3ca497fcb762f358410a490379 Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Thu, 22 Dec 2016 10:58:31 -0500
Subject: [PATCH] add null checks

---
 MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
index 23e63dad0..116a6a7cf 100644
--- a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
+++ b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
@@ -95,6 +95,11 @@ namespace MediaBrowser.MediaEncoding.Encoder
             int defaultImageExtractionTimeoutMs,
             bool enableEncoderFontFile, IEnvironmentInfo environmentInfo)
         {
+            if (jsonSerializer == null)
+            {
+                throw new ArgumentNullException("jsonSerializer");
+            }
+
             _logger = logger;
             _jsonSerializer = jsonSerializer;
             ConfigurationManager = configurationManager;
@@ -632,7 +637,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
 
                     var result = _jsonSerializer.DeserializeFromStream<InternalMediaInfoResult>(process.StandardOutput.BaseStream);
 
-                    if (result.streams == null && result.format == null)
+                    if (result == null || (result.streams == null && result.format == null))
                     {
                         throw new Exception("ffprobe failed - streams and format are both null.");
                     }