From f90487063bf7b61ca566b7b86b9089bf16633c40 Mon Sep 17 00:00:00 2001
From: kszaq <737984+kszaq@users.noreply.github.com>
Date: Thu, 6 May 2021 23:25:37 +0200
Subject: [PATCH] HEVC: Use constant frame rate if average is 0

---
 src/main.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 12657fb53..c5872d20a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -890,12 +890,18 @@ class ATTRIBUTE_HIDDEN HEVCCodecHandler : public CodecHandler
               AP4_DYNAMIC_CAST(AP4_HevcSampleDescription, sample_description))
       {
         bool ret = false;
-        if (hevc->GetConstantFrameRate() && hevc->GetAverageFrameRate())
+        if (hevc->GetAverageFrameRate())
         {
           info.SetFpsRate(hevc->GetAverageFrameRate());
           info.SetFpsScale(256);
           ret = true;
         }
+        else if (hevc->GetConstantFrameRate())
+        {
+          info.SetFpsRate(hevc->GetConstantFrameRate());
+          info.SetFpsScale(256);
+          ret = true;
+        }
         return ret;
       }
     }