From 4cce8baf9b11634524d264f3999703b5c8fa602d Mon Sep 17 00:00:00 2001
From: Thulinma <jaron@vietors.com>
Date: Thu, 27 May 2021 16:03:41 +0200
Subject: [PATCH] Fixed zero-length sortset causing crash in MP4 output

---
 src/output/output_mp4.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/output/output_mp4.cpp b/src/output/output_mp4.cpp
index 9ba6b522..5a15d062 100644
--- a/src/output/output_mp4.cpp
+++ b/src/output/output_mp4.cpp
@@ -1350,7 +1350,7 @@ namespace Mist{
 
     // The remainder of this function handles non-live situations
     if (M.getLive()){
-      sortSet.erase(sortSet.begin());
+      if (sortSet.size()){sortSet.erase(sortSet.begin());}
       return;
     }