From 072e3f710e836077defaca424bdad0b69f039fb5 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Tue, 11 Oct 2022 12:32:02 +0200
Subject: [PATCH] fftools/ffmpeg_mux: do not unref a NULL packet

The packet submitted to of_submit_packet() may be NULL to signal EOF.
---
 fftools/ffmpeg_mux.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fftools/ffmpeg_mux.c b/fftools/ffmpeg_mux.c
index 395f7cc89f..a6877ae5ec 100644
--- a/fftools/ffmpeg_mux.c
+++ b/fftools/ffmpeg_mux.c
@@ -329,7 +329,8 @@ int of_submit_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
         /* the muxer is not initialized yet, buffer the packet */
         ret = queue_packet(of, ost, pkt);
         if (ret < 0) {
-            av_packet_unref(pkt);
+            if (pkt)
+                av_packet_unref(pkt);
             return ret;
         }
     }