From 274e134e49b1c92db0f0b8cb2ae7554fb7b9184c Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Wed, 29 May 2013 15:38:21 +0200
Subject: [PATCH] avconv: check that the output format context exists before
 accessing it

Fixes a segfault in exit_program() if opening an output file fails.
---
 avconv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/avconv.c b/avconv.c
index cce9a83e6a..480823506f 100644
--- a/avconv.c
+++ b/avconv.c
@@ -167,7 +167,7 @@ static void exit_program(void)
     /* close files */
     for (i = 0; i < nb_output_files; i++) {
         AVFormatContext *s = output_files[i]->ctx;
-        if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
+        if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE) && s->pb)
             avio_close(s->pb);
         avformat_free_context(s);
         av_dict_free(&output_files[i]->opts);