From f50d8a87fe399541b73c4e36ba2c78c4a8443447 Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Tue, 27 Sep 2016 01:04:44 +0200
Subject: [PATCH] Don't call avio_closep() unless we actually have an output
 file (e.g. in the stream mux).

---
 mux.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mux.cpp b/mux.cpp
index 2947cac..df974f0 100644
--- a/mux.cpp
+++ b/mux.cpp
@@ -94,7 +94,10 @@ Mux::Mux(AVFormatContext *avctx, int width, int height, Codec video_codec, const
 Mux::~Mux()
 {
 	av_write_trailer(avctx);
-	avio_closep(&avctx->pb);
+	if (!(avctx->oformat->flags & AVFMT_NOFILE) &&
+	    !(avctx->flags & AVFMT_FLAG_CUSTOM_IO)) {
+		avio_closep(&avctx->pb);
+	}
 	avformat_free_context(avctx);
 }
 
-- 
2.39.2