From 45a528a19938ca7b8975de68a71607373c54f70b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=80=90=E6=B5=AA=E4=BA=BA?= <zhulangren@gmail.com>
Date: Tue, 10 Mar 2020 10:34:12 +0800
Subject: [PATCH] Update FlvEncoder.cs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

处理视频头部创建异常
---
 src/JT1078.Flv/FlvEncoder.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/JT1078.Flv/FlvEncoder.cs b/src/JT1078.Flv/FlvEncoder.cs
index a2f56f9..cad5ee1 100644
--- a/src/JT1078.Flv/FlvEncoder.cs
+++ b/src/JT1078.Flv/FlvEncoder.cs
@@ -217,7 +217,11 @@ namespace JT1078.Flv
                     flvMessagePackWriter.WriteArray(flvHeader);
                     // always 0
                     flvMessagePackWriter.WriteUInt32(0);
-                    //解析sps 
+                    //解析sps
+                    if (sps == null)
+                    {
+                        return null;
+                    } 
                     var rawData = h264Decoder.DiscardEmulationPreventionBytes(sps.RawData);
                     ExpGolombReader h264GolombReader = new ExpGolombReader(rawData);
                     SPSInfo spsInfo = h264GolombReader.ReadSPS();