From 4895aa65c6ddec2e33ec3c023f221b1bafcbaf9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
Date: Fri, 19 Dec 2014 15:40:02 +0200
Subject: [PATCH] libavformat: Allow calling av_write_trailer with a NULL
 AVIOContext
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Signed-off-by: Martin Storsjö <martin@martin.st>
---
 libavformat/mux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/mux.c b/libavformat/mux.c
index 9aee224d1f..2a28fd668a 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -624,7 +624,7 @@ int av_write_trailer(AVFormatContext *s)
     if (s->oformat->write_trailer)
         ret = s->oformat->write_trailer(s);
 
-    if (!(s->oformat->flags & AVFMT_NOFILE))
+    if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
         avio_flush(s->pb);
 
 fail: